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Product Service Manual

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HP LaserJet 3100 Produ

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Copyright Information

© 1997 Hewlett-PackardCompany

All Rights Reserved.Reproduction, adaptation, ortranslation without prior writtenpermission is prohibited exceptas allowed under copyrightlaws.

Part Number: C3948-90957

First Edition, March 1998

Warranty

The information contained inthis document is subject tochange without notice.

Hewlett-Packard makes nowarranty of any kind withrespect to this information.HEWLETT-PACKARDSPECIFICALLY DISCLAIMSTHE IMPLIED WARRANTY OFMERCHANTABILITY AND

FITNESS FOR APARTICULAR PURPOSE

Hewlett-Packard shall not beliable for any direct, indirect,incidental, consequential, orother damage alleged inconnection with the furnishing oruse of this information.

NOTICE TO U.S.GOVERNMENT USERS:RESTRICTED RIGHTSCOMMERCIAL COMPUTERSOFTWARE: “Use, duplication,or disclosure by theGovernment is subject torestrictions as set forth in

subparagraph (c)(1)(ii) of theRights in Technical Data Clauseat DFARS 52.227-7013.”

Material scanned by thisproduct may be protected bygovernmental laws and otherregulations, such as copyright

laws. The customer is solelyresponsible for complying withall such laws and regulations.

This product may be serviced

only in the country for which

it was designed to be used.

Tradem

JetSuiteHewlettof JetFa

MicrosoMS-DOtrademCorpor

Iris is a the Cae

ENERGregisterUnited Protect

CompuCompu

All othe

herein mtheir res

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Contents

1 Product Information

Chapter contents . . . . . . . . . . . . . . . . . . . . . . . . . .Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product features . . . . . . . . . . . . . . . . . . . . . . . . . .Product specifications . . . . . . . . . . . . . . . . . . . . . .Model and serial numbers. . . . . . . . . . . . . . . . . . .Product overview. . . . . . . . . . . . . . . . . . . . . . . . . .Regulatory information . . . . . . . . . . . . . . . . . . . . .

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Laser statement for Finland . . . . . . . . . . . . .

FCC regulations . . . . . . . . . . . . . . . . . . . . . . .Telephone consumer protection act (U.S.) . . IC CS-03 requirements . . . . . . . . . . . . . . . . . .Declaration of conformity . . . . . . . . . . . . . . . Canadian DOC regulations. . . . . . . . . . . . . . Environmental product stewardship programMaterial safety data sheet. . . . . . . . . . . . . . . .

2 Installation and operation

Chapter contents . . . . . . . . . . . . . . . . . . . . . . . . . .Operating environment . . . . . . . . . . . . . . . . . . . . .Media requirements. . . . . . . . . . . . . . . . . . . . . . . .Toner cartridge information . . . . . . . . . . . . . . . . . .

Storage conditions . . . . . . . . . . . . . . . . . . . . .Storing opened toner cartridges . . . . . . . . . . Toner Recycling . . . . . . . . . . . . . . . . . . . . . . .

Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Control panel messages . . . . . . . . . . . . . . . . Menu tree

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4 Functional overview

Chapter contents . . . . . . . . . . . . . . . . . . . . . . . . . .Basic functions . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printer functions . . . . . . . . . . . . . . . . . . . . . . . . . .ECU/power system . . . . . . . . . . . . . . . . . . . . . . . .

Print engine control system. . . . . . . . . . . . . . Power system (on ECU) . . . . . . . . . . . . . . . .

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . .Central processing unit . . . . . . . . . . . . . . . . . .Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Parallel interface . . . . . . . . . . . . . . . . . . . . . . .Control panel. . . . . . . . . . . . . . . . . . . . . . . . . .Draft mode . . . . . . . . . . . . . . . . . . . . . . . . . . .

Image formation system . . . . . . . . . . . . . . . . . . . .Toner cartridge . . . . . . . . . . . . . . . . . . . . . . . Step 1: Primary charging . . . . . . . . . . . . . . .

Step 2: Scanning exposure. . . . . . . . . . . . . . Step 3: Developing . . . . . . . . . . . . . . . . . . . . .Step 4: Transferring . . . . . . . . . . . . . . . . . . . .Step 5: Separating . . . . . . . . . . . . . . . . . . . . .Step 6: Drum cleaning . . . . . . . . . . . . . . . . . Fixing stage. . . . . . . . . . . . . . . . . . . . . . . . . . .

Printer feed system . . . . . . . . . . . . . . . . . . . . . . . .

Paper jam detection . . . . . . . . . . . . . . . . . . . .Solenoid, photosensors, and switches . . . . . Document scanner system . . . . . . . . . . . . . . . . . Basic sequence of operation (formatter-to-printer)

5 Removal and replacement

Chapter contents . . . . . . . . . . . . . . . . . . . . . . . . . .Removal and replacement strategy. . . . . . . . . . . Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . .Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . .Right side cover

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Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . .LIU board . . . . . . . . . . . . . . . . . . . . . . . . . . . .Formatter board . . . . . . . . . . . . . . . . . . . . . . .Metal side plate. . . . . . . . . . . . . . . . . . . . . . . Exit roller. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Delivery assembly. . . . . . . . . . . . . . . . . . . . . .Fuser pressure plate. . . . . . . . . . . . . . . . . . . .Front casing . . . . . . . . . . . . . . . . . . . . . . . . . .Heating element . . . . . . . . . . . . . . . . . . . . . . Pressure roller. . . . . . . . . . . . . . . . . . . . . . . .

Face-up/face-down lever . . . . . . . . . . . . . . . Fuser exit roller assembly. . . . . . . . . . . . . . . Paper exit sensor flag . . . . . . . . . . . . . . . . . . .Laser/scanner assembly. . . . . . . . . . . . . . . . Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pickup roller assembly . . . . . . . . . . . . . . . . . Paper feed frame . . . . . . . . . . . . . . . . . . . . . .

Transfer roller guide and transfer roller. . . . . Kick plate . . . . . . . . . . . . . . . . . . . . . . . . . . . .Separation pad . . . . . . . . . . . . . . . . . . . . . . . .Subpads . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Feed assembly . . . . . . . . . . . . . . . . . . . . . . .

Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . .Cable guide. . . . . . . . . . . . . . . . . . . . . . . . . . .

Main Motor . . . . . . . . . . . . . . . . . . . . . . . . . . .ECU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Feet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Troubleshooting

Chapter contents . . . . . . . . . . . . . . . . . . . . . . . . . .

Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . .Error messages. . . . . . . . . . . . . . . . . . . . . . . . . . .Image formation troubleshooting. . . . . . . . . . . . .

Check the toner cartridge . . . . . . . . . . . . . . . Solving image quality problems . . . . . . . . . .

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Troubleshooting tools . . . . . . . . . . . . . . . . . . . . . .Paper path and components. . . . . . . . . . . . . Document path and components . . . . . . . . . Repetitive image defect ruler . . . . . . . . . . . . Main wiring . . . . . . . . . . . . . . . . . . . . . . . . . .

Service menus. . . . . . . . . . . . . . . . . . . . . . . . . . . .Control panel service menu . . . . . . . . . . . . . Extended service menu . . . . . . . . . . . . . . . . .

Softswitches . . . . . . . . . . . . . . . . . . . . . . . . . . . . .To change the country code softswitch. . . . .

Firmware download. . . . . . . . . . . . . . . . . . . . . . . .

7 Parts and diagrams

Chapter contents . . . . . . . . . . . . . . . . . . . . . . . . . .How to use the parts lists and diagrams . . . . . . .

Ordering parts. . . . . . . . . . . . . . . . . . . . . . . . .Consumables and accessories . . . . . . . . . . . . . .

Ordering consumables . . . . . . . . . . . . . . . . . Common hardware . . . . . . . . . . . . . . . . . . . . . . . .Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . .Numerical parts list . . . . . . . . . . . . . . . . . . . . . . .

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Figures

Figure 1. Model and serial number label . . . Figure 2. Document scanner path . . . . . . . . Figure 3. Printer path (1 of 2) . . . . . . . . . . . . Figure 4. Printer path (2 of 2) . . . . . . . . . . . .

Figure 5. Rear view . . . . . . . . . . . . . . . . . . . . Figure 6. Control panel layout . . . . . . . . . . . . Figure 7. Basic configuration . . . . . . . . . . . . Figure 8. Printer unit functional block diagram Figure 9. ECU loads . . . . . . . . . . . . . . . . . . . Figure 10. High-voltage power supply circuit . Figure 11. Image formation block diagram . . .

Figure 12. Simplified paper path . . . . . . . . . . . Figure 13. Solenoid, photosensors, and switcheFigure 14. Simplified document path . . . . . . . Figure 15. General timing diagram . . . . . . . . . Figure 16. Back cover removal (1 of 2) . . . . . . Figure 17. Back cover removal (2 of 2) . . . . . . Figure 18. Right side cover removal . . . . . . . .

Figure 19. Left side cover removal . . . . . . . . . Figure 20. Left front cover removal . . . . . . . . . Figure 21. Top cover removal . . . . . . . . . . . . . Figure 22. RFI shield removal . . . . . . . . . . . . . Figure 23. Printer door removal (1 of 3) . . . . . Figure 24. Printer door removal (2 of 3) . . . . . Figure 25. Printer door removal (3 of 3) . . . . .

Figure 26. Document release door removal (1 oFigure 27. Document release door removal (2 oFigure 28. Upper guide assembly removal (1 ofFigure 29. Upper guide assembly removal (2 ofFigure 30. Contact image sensor removal (1 of

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Figure 42. Fuser pressure plate removal . . . . Figure 43. Fuser pressure plate replacement . Figure 44. Front casing removal . . . . . . . . . . . Figure 45. Heating element removal (1 of 2) . Figure 46. Heating element removal (2 of 2) . Figure 47. Pressure roller guide removal . . . . Figure 48. Face-up/face-down lever replacemeFigure 49. Fuser exit roller assembly removal Figure 50. Paper exit sensor flag replacement Figure 51. Laser/scanner assembly removal .

Figure 52. Solenoid removal (1 of 2) . . . . . . . Figure 53. Solenoid removal (2 of 2) . . . . . . . Figure 54. Pickup roller assembly removal (1 ofFigure 55. Pickup roller assembly removal (2 ofFigure 56. Paper pickup roller assembly replaceFigure 57. Paper feed frame removal (1 of 3) . Figure 58. Paper feed frame removal (2 of 3) .

Figure 59. Paper feed frame removal (3 of 3) . Figure 60. Transfer roller guide and transfer rolFigure 61. Kick plate removal . . . . . . . . . . . . . Figure 62. Kick plate spring replacement . . . . Figure 63. Separation pad removal . . . . . . . . Figure 64. Subpad removal . . . . . . . . . . . . . . Figure 65. Feed assembly removal (1 of 3) . .

Figure 66. Feed assembly removal (2 of 3) . . Figure 67. Feed assembly removal (3 of 3) . . Figure 68. Cable guide removal . . . . . . . . . . . Figure 69. Motor removal . . . . . . . . . . . . . . . . Figure 70. ECU removal (1 of 4) . . . . . . . . . . . Figure 71. ECU removal (2 of 4) . . . . . . . . . . . Figure 72. ECU removal (3 of 4) . . . . . . . . . . .

Figure 73. ECU removal (4 of 4) . . . . . . . . . . . Figure 74. Feet removal . . . . . . . . . . . . . . . . . Figure 75. Engine test switch location . . . . . . Figure 76. Toner cartridge high-voltage connecFigure 77. High-voltage connector assembly .

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Figure 89. Document scanner assembly . . . . Figure 90. Internal components (1 of 3) . . . . . Figure 91. Internal components (2 of 3) . . . . . Figure 92. Internal components (3 of 3) . . . . . Figure 93. Electrical components assembly . . Figure 94. Paper pickup assembly . . . . . . . . . Figure 95. Feed assembly . . . . . . . . . . . . . . . Figure 96. Separation guide assembly . . . . . . Figure 97. Delivery assembly . . . . . . . . . . . . .

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Tables

Table 1. Product features . . . . . . . . . . . . . . . Table 2. Physical specifications . . . . . . . . . . Table 3. Performance specifications . . . . . . Table 4. Power specifications. . . . . . . . . . . . Table 5. Operating acoustical emissions . . . Table 6. Environmental requirements. . . . . . Table 7. Media requirements . . . . . . . . . . . . Table 8. Control panel messages. . . . . . . . . Table 9. Menu tree . . . . . . . . . . . . . . . . . . . . Table 10. Life expectancies of consumables . Table 11. DC power distribution . . . . . . . . . . .

Table 12. Timing. . . . . . . . . . . . . . . . . . . . . . . Table 13. Control panel service menu . . . . . . Table 14. Extended service menu tree. . . . . . Table 15. Extended service mode self-test failuTable 16. Extended service mode tests . . . . . Table 17. Extended service mode reports . . . Table 18. Country code softswitch sequences

Table 19. Consumables and accessories. . . . Table 20. Common fasteners . . . . . . . . . . . . . Table 21. Supports . . . . . . . . . . . . . . . . . . . . . Table 22. External covers and panels . . . . . . Table 23. Printer door (1 of 2) . . . . . . . . . . . . Table 24. Printer door (2 of 2) . . . . . . . . . . . . Table 25. Document scanner assembly . . . . .

Table 26. Internal components (1 of 3). . . . . . Table 27. Internal components (2 of 3). . . . . . Table 28. Internal components (3 of 3). . . . . . Table 29. Electrical components assembly . . Table 30. Paper pickup assembly . . . . . . . . .

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1Product Informat

Chapter contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product features . . . . . . . . . . . . . . . . . . . . . . . . . .

Product specifications . . . . . . . . . . . . . . . . . . . . . .

Model and serial numbers . . . . . . . . . . . . . . . . . . .

Product overview. . . . . . . . . . . . . . . . . . . . . . . . . .

Regulatory information . . . . . . . . . . . . . . . . . . . . .

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Introduction

The HP LaserJet 3100 product is a powerful busincapabilities of a full range of office equipment. Wi3100 product, you can:

q Print—Easily print documents with the laser qcome to expect from an HP LaserJet printer.

q Fax—Use the HP LaserJet 3100 product as amachine to send and receive faxes, as well astasks such as forwarding faxes to other locatisoftware to send faxes from and receive them

q Copy—Make superior laser-quality copies. Yo99 copies of a 30-page original. You can alsoadjust contrast and collate.

q Scan—Scan important documents to create e

q Use Software—Use the software to print, fax, use the software to store and organize scann

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Product features

Table 1. Product features

Feature Description

Print speed 6 pages per minute (ppm)

Copy speed 6 ppm

Fax transmission speed 6 seconds per page

Margins for scanned items 0.16 in (4.06 mm) at leading and trailing edg0.12 in (3.05 mm) at sides

Margins for printed pages 0.20 in (5.08 mm) at sides0.25 in (6.35 mm) at leading and trailing edg

Fax compatibility International Telecommunications Union (IT

Fax coding schemes MR, MMR, MH, and JBIG

Modem speed 14,400 bits per second (bps)

Speed dialing Yes

Distinctive ring detect Yes

Multiple copies Up to 99 per job

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Table 4. Power specifications

Category Specification

Power requirements 100 to 127 Volts alternating current (Vac) +/220 to 240 Vac +/-10%; 50 hertz

Power consumption (incontinuous copy mode)

135 watts

Power consumption (idle) 9 watts

Minimum recommendedcircuit capacity

4.2 amps (110 volts)2 amps (220 volts)(4.2 amps maximum pull)

Table 5. Operating acoustical emissions (per International SOrganization 9296) specifications

Category Specification

Sound Power Level,LWAd (1 bel = 10 decibels)

5.7 bels (B)

Sound Pressure Level,LpAm (Operator Position)

52 decibels (dB)

Sound Pressure Level,LpAm (Bystander Position)

43 dB

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Model and serial numbers

The model number and serial number are listed olabel located on the back of the printer. The modeLaserJet 3100 product is C3948A.

The serial number contains information about the the Revision Level, the Production Code, and prothe HP LaserJet 3100 product.

The label also contains power rating and regulato

Figure 1. Model and serial number label

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Product overview

Figure 2. Document scanner path

1 Document output support

2 Document output slot3 Document release door/control panel

4 Document feeder tray guides

5 Document feeder tray

6 Document feeder support

7 Special media lever

1

2

7

34 5

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Figure 3. Printer path (1 of 2)

1 Front paper output

2 Paper path lever

3 Control panel

4 Printer door

5 Printer door release latches

6 Paper output support

7 Paper input support

1

2

3

4 5 6

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Figure 4. Printer path (2 of 2)

1 Output bin

2 Input bin

3 Paper guides

4 Single-sheet input slot

1

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Figure 5. Rear view

1 Power cable connector

2 Phone line connector (or connectors, depend

3 Parallel cable connector

1

2

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Regulatory information

Safety

Transportation

Non-operating Magnetic Field Emissions, IATA PaInstructions 902

Laser safety statement

The Center for Devices and Radiological Health (Food and Drug Administration has implemented rproducts manufactured since August 1, 1976. Commandatory for products marketed in the United Stcertified as a “Class 1” laser product under the U.

Health and Human Services (DHHS) Radiation PeStandard according to the Radiation Control for Heof 1968. Since radiation emitted inside this printerconfined within protective housings and external cbeam cannot escape during any phase of normal

WARNING! Using controls, making adjustments, or performinthan those specified in this manual may result in expradiation.

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Laser statement for Finland

Luokan 1 laserlaite

Klass 1 Laser Apparat

HP LaserJet 3100 laserkirjoitin on käyttäjän kannaluokan 1 laserlaite. Normaalissa käytössä kirjoittimestää lasersäteen pääsyn laitteen ulkopuolelle.Laturvallisuusluokka on määritetty standardin EN 60

mukaisesti.

Varoitus!

Laitteen käyttäminen muulla kuin käyttöohjeessa saattaa altistaa käyttäjän turvallisuusluokan 1 ylittnäkymättömälle lasersäteilylle.

Varning!

Om apparaten används på annat sätt än i bruksaspecificerats, kan användaren utsättas för osynlig överskrider gränsen för laserklass 1.

HUOLTOHP LaserJet 3100 -kirjoittimen sisällä ei ole käyttäolevia kohteita. Laitteen saa avata ja huoltaa ainohuoltamiseen koulutettu henkilö. Tällaiseksi huoltokatsota väriainekasetin vaihtamista, paperiradan muita käyttäjän käsikirjassa lueteltuja, käyttäjän tetarkoitettuja ylläpitotoimia, jotka voidaan suorittaa

erikoistyökaluja.

Varo!

Mikäli kirjoittimen suojakotelo avataan, olet alttiina

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FCC regulations

This equipment has been tested and found to comfor a Class B digital device, pursuant to Part 15 of

These limits are designed to provide reasonable pharmful interference in a residential installation. Tgenerates, uses, and can radiate radio frequencyinstalled and used in accordance with the instructharmful interference to radio communications. Hoguarantee that interference will not occur in a part

If this equipment does cause harmful interferencetelevision reception, which can be determined by equipment off and on, the user is encouraged to tinterference by one or more of the following meas

q Reorient or relocate the receiving antenna.

q Increase separation between equipment and

q Connect equipment to an outlet on a circuit diwhich the receiver is located.

q Consult your dealer or an experienced radio/T

Note Any changes or modifications to the printer that aapproved by HP could void the user’s authority toequipment.

Note Use of a shielded interface cable is required to coB limits of Part 15 of FCC rules.

FCC part 68 requirements

This equipment complies with FCC rules, Part 68.equipment is a label that contains, among other inregistration number and ringer equivalence numb

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This equipment uses the following USOC jacks:

RJ11C

An FCC-compliant telephone cord and modular p

this equipment. This equipment is designed to betelephone network or premises wiring using a com jack which is Part 68 compliant.

This equipment cannot be used on telephone comservice. Connection to Party Line Service is subje

If this equipment causes harm to the telephone ne

telephone company will notify you in advance thadiscontinuance of service may be required. If advpractical, the telephone company will notify the cupossible. Also, you will be advised of your right to the FCC if you believe it is necessary.

The telephone company may make changes in its

equipment, operations, or procedures that could aof the equipment. If this happens, the telephone coadvance notice in order for you to make the necesin order to maintain uninterrupted service.

If trouble is experienced with this equipment, pleasin the front of this manual for repair and (or) warra

If the trouble is causing harm to the telephone netwcompany may request you remove the equipmentuntil the problem is resolved.

The following repairs can be done by the custome

Replace any original equipment that came with theproduct. This includes the toner cartridge, the supbins, the power cord and the telephone cord.

It is recommended that the customer install an ACthe AC outlet to which this device is connected. Tdamage to the equipment caused by local lightnin

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Telephone consumer protection

The Telephone Consumer Protection Act of 1991 for any person to use a computer or other electron

fax machines, to send any message unless such contains, in a margin at the top or bottom of each on the first page of the transmission, the date andan identification of the business, other entity, or indmessage and the telephone number of the sendinbusiness, other entity, or individual. (The telephonmay not be a 900 number or any other number fo

exceed local or long-distance transmission charge

In order to program this information into your facs“Setting the fax header” and “Setting the time andguide.

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IC CS-03 requirements

NOTICE: The Industry Canada label identifies cerThis certification means that the equipment meets

telecommunications network protective, operationrequirements as prescribed in the appropriate TerTechnical Requirement document(s). The Departguarantee the equipment will operate to the user’s

Before installing this equipment, users should enspermissible to be connected to the facilities of the

telecommunications company. The equipment muusing an acceptable method of connection. The caware that compliance with the above conditions degradation of service in some situations.

Repairs to certified equipment should be coordinarepresentative designated by the supplier. Any remade by the user to this equipment, or equipmentgive the telecommunications company cause to redisconnect the equipment.

Users should ensure for their own protection that tconnections of the power utility, telephone lines awater pipe system, if present, are connected togeprecaution may be particularly important in rural a

Caution: Users should not attempt to make such themselves, but should contact the appropriate elauthority, or electrician, as appropriate.

The Ringer Equivalence Number (REN) of this de

NOTICE: The Ringer Equivalence Number (REN)

terminal device provides an indication of the maxiterminals allowed to be connected to a telephonetermination on an interface may consist of any comsubject only to the requirement that the sum of theEquivalence Number of all the devices does not e

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Declaration of conformity

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name: Hewlett-Packard Company

Manufacturer’s Address: 11311 Chinden BoulevardBoise, Idaho 83714-1021, USA

declares, that the product

Product Name: HP LaserJet 3100 product

Model Number: C3948A

Product Options: ALL

conforms to the following Product Specifications:

Safety: IEC 950:1991+A1+A2+A3 / EN 60950:1992+A1+A2+AEN 41003:1993IEC 825-1:1993 / EN 60825-1:1994 Class 1 (Laser/LED

EMC: CISPR 22:1993+A1 / EN 55022:1994 Class B1 

EN 50082-1:1992IEC 801-2:1991 / prEN 55024-2:1992-3kV CD, 8kV IEC 801-3:1984 / prEN 55024-3:1991-3 V/mIEC 801-4:1988 / prEN 55024-4:1992-0.5 kV Signal

1IEC 1000-3-2:1995 / EN61000-3-2:1995IEC 1000-3-3:1994 / EN61000-3-3:1995

FCC Title 47 CFR, Part 15 Class B2 / ICES-003, Issue AS / NZS 3548:1995 / CISPR 22:1993 Class B1

Supplementary Information:

The product herewith complies with the requirements of the following Directivmarking accordingly:- the EMC directive 89/336/EEC- the Low Voltage Directive 73/23/EEC

1This product was tested in a typical configuration with Hewlett-Packard Pers2This Device complies with part 15 of the FCC Rules. Operation is subject to

conditions: (1) this device may not cause harmful interference, and (2) this dinterference received, including interference that may cause undesired opera

March 25, 1997

For Compliance Information ONLY, contact:

A t li C t t P d t R l ti M H l tt P k d A t li Ltd

C di DOC l i

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Canadian DOC regulations

Complies with Canadian EMC Class B requireme

Conforme á la classe B des normes canadiennesélectromagnétiques. << CEM>>.

Environmental product stewards

Protecting the environment

Hewlett-Packard Company is committed to providin an environmentally sound manner. This HP Lasbeen designed with several attributes to minimizeenvironment.

This HP LaserJet printer design eliminates:

Ozone productionThe printer does not use high-voltage corona wireelectrophotographic process and therefore generaozone gas (O3). Instead, this printer uses chargingcartridge and in the print engine.

This HP LaserJet printer design reduces:

Energy consumption

Energy usage drops to as little as 9 watts while in does this save natural resources, but it also savesaffecting the high performance of this product. Thfor the ENERGY STAR Program (U.S. and Japan). Evoluntary program established to encourage the d

energy-efficient office products. ENERGY STAR is aservice mark of the U.S. Environmental Protection

As an ENERGY STAR pPackard Company ha

T ti

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Toner consumption

Depending on the type of printer driver you have, select a “draft” mode which uses about 50% less extending the life of the toner cartridge. This is onprinter driver properties when printing or making csoftware.

Paper use

Depending on the type of program you use, you m2 or 4 document pages on each printed page. Thi

practice and the printer’s manual duplex capabilityprinting) reduce paper usage and the resulting deresources.

The design of this HP LaserJet printer facilitatof:

Plastics

Plastic parts have marking according to internatioenhance the ability to identify plastics for recyclingend of the product’s life. The plastics used in the pchassis are technically recyclable.

HP toner cartridges/photoconductive drum

In many countries, this product’s toner cartridge/dreturned to HP using the prepaid shipping label anincluded inside each new HP toner cartridge box. not listed in the recycling guide, call your local HPOffice for further instructions.

HP cartridge recycling program

Since 1990, the HP LaserJet Toner Cartridge Reccollected more than 12 million cartridges that othebeen discarded into landfills or similar facilities. Oreturned through the prepaid return program, it is reusable components and the plastic housing are

Printer and parts

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Printer and parts

Design for recycling has been incorporated into thaccessories. The number of materials has been kwhile ensuring proper functionality and high produDissimilar materials have been designed to separFasteners and other connections are easy to locaremove with common tools. High priority parts havbe accessed quickly for efficient disassembly and have been primarily designed in two colors to enhoptions. A few small parts are colored specifically

customer access points.HP provides a product return system for customeMany of the functional parts are recovered, testedfully warranted service parts. Used parts are not pproduct manufacturing. Remaining product parts apossible. For product return information, contact:

Hewlett-Packard GmbHWertstoffzentrumFronackerstr .3071063 Sindelfingen

Paper

This printer is suited for the use of recycled paper

meets the guidelines outlined in the HP LaserJet PSpecification Guide, HP part number 502-8956. Tfor the use of recycled paper according to DIN 19

To ensure longevity of your HP LaserJet printefollowing:

Extended warranty

HP SupportPack provides coverage for the HP haall HP-supplied internal components. The hardwacovers a three-year period from date of the HP proSupportPack must be purchased by the customer

Material safety data sheet

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Material safety data sheet

The Material Safety Data Sheet for the toner can calling U.S. HP FIRST (Fax Information Retrieval

Technology) at (800) 231-9300. After connecting,request document number 10164.

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2 Installation and

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2 Installation and

operation

Chapter contents

Operating environment . . . . . . . . . . . . . . . . . . . . .

Media requirements. . . . . . . . . . . . . . . . . . . . . . . .

Toner cartridge information . . . . . . . . . . . . . . . . . .Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating environment

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Operating environment

The environmental requirements listed below mus

ensure the proper operation of the HP LaserJet 3

Consider the following before installing the printer

q Install in a well-ventilated, dust-free area.

q Install on a hard, flat, continuous surface, withDo not install on carpet or other soft surfaces

q Ensure adequate power is supplied. Uninterrusupplies (UPS) should not be used with the Hproduct.

CAUTION Using uninterruptible power supplies can damage

q Install away from direct sunlight, open flames,

Table 6. Environmental requirements

Category Requirement

Operating (working orstandby)

Temperature: 59 to 90.5 degrees Fahrenhe(15 to 32.5 degrees Celsius)

Humidity: 10 to 80 percent relative humidity

Non-operating Temperature (toner cartridge): -4 to 104°F (Temperature (product): -4 to 140°F (-20 to 6Humidity: 10 to 90 percent relative humidity

Normal storage Temperature: 32 to 95°F (0 to 35°C)Humidity: 35 to 85 percent relative humidity

Media requirements

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Media requirements

Media must be in good condition. Do not use med

or irregular. The table below details media requireLaserJet 3100 product.

Table 7. Media requirements

Input for paper input bin and single-sheet input slot (for print

Media size Maximum: 8.5 by 14 in (216 by 356 mm)Minimum: 3 by 5 in (76.2 by 127 mm)

Media weight For paper output bin: 16 to 28 lb; (60 to 105

For front output slot: 16 to 42 lb (60 to 157 g

Paper input bin capacityUp to 100 sheets of media at 20 lb (75 g/m

2

(fewer than 100 sheets of heavier media) or

Input for document feeder tray (for document scanner path)

Item size Maximum width: 8.5 in (216 mm)Maximum length: 39 in (991 mm); up to 118

“long pages” enabledMinimum size: 2 by 3.5 in (51 by 89 mm)

Item weight Maximum: 28 lb (105 g/m2) for normal use;

up to 67 lb (252 g/m2) when using specia

Minimum: 12 lb (44 g/m2)

Document feeder traycapacity

Up to 30 pages of an item at 20 lb (75 g/m2

Fewer than 30 pages of items up to 28 lb (1

One page at a time of 12 to 67 lb (44 to 252special media lever

Toner cartridge information

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Toner cartridge information

Toner cartridges contain components that are sen

temperature, and humidity. Follow the recommensection to ensure the highest quality and longest cartridges.

Keep the HP LaserJet 3100 product within the folenvironmental conditions for optimum performanc

Storage conditions

Toner cartridges are affected by their environmenprotects toner cartridges from light and increases important to store cartridges in their original packainstallation.

When storing cartridges in a warehouse or work astorage place meets the conditions specified in Ta

Storing opened toner cartridges

Because cartridges do not have shutters to cover access slot, they should be kept inside the HP Lasuntil empty. Toner cartridges that have had the toremoved are also more vulnerable to environmen

If a toner cartridge must be removed from the HP product, always store the cartridge:

q Inside the protective bag in which it was origin

q In a dark cabinet, away from direct sunlight.q Correct side up and in a horizontal position (n

q Away from ammonia or organic solvent fumes

Control panel

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Control panel

Figure 6. Control panel layout

1 2 3 4 5

6 7

8

1

12131415

16

17

18

1. Ready light 7. Forward arrow key 13. Spee

2. Error light 8. Stop/clear key 14. Redia

3. Control panel display 9. Copy key 15. Nume

4. Enter/menu key 10. One-touch keys 16. Volum

5. Backspace key 11. Start key 17. Reso

6. Back arrow key 12. Manual dial key 18. Contr

Control panel messages

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p g

These control panel messages are listed alphabeaccompanied by the cause for the message and s

resolve the problem.Table 8. Control panel messages

Message Cause Solution

(number) is a Group

Group not Allowed

The group-dial code you entered is

assigned to a group, but a group cannotbe dialed at this point.Entries assigned as groups cannot beassigned into other groups.

Enter a differen

speed-dial code

Already in Group While programming a group-dial code,you have tried to add a fax number that is

already in the group.

Continue by addyou want to the

Blacklisted(France only)

The fax number you are trying to dial hasreceived a voice answer or no answer,was busy on the first dial and redials, orwas busy with redials pending.

To clear the blamachine’s powestrip or outlet an

Busy While sending a fax, receiving fax line wasbusy for all redial attempts.

Check the fax nthe fax. If the mtry sending to anagain later.

Cancel Group EditENTER to Confirm

You pressed Back Space while in agroup-dial code in the Group Dial Setup

Menu level.

Press START to code and contin

Press ENTER /MDial Setup levelENTER /MENU aggroup-dial codePress STOP /CLE

settings

Table 8. Control panel messages

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Clear DocumentFrom Scanner

Your document jammed while being fedthrough the document feeder tray or theHP LaserJet 3100 product loaded multiplesheets of the document.

The special media lever was in the wrongposition for the document you sent.

The control panel configuration was setincorrectly.

Pull the documeremove the jamclose the door.

Remove the jamabove. Then, chlever. It should weight items or items, which mu

Check the contrfor outgoing faxlong pages” sett

Message Cause Solution

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Table 8. Control panel messages

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ConfigurationErr # (number 1-4)

An error was detected in the staticrandom-access memory (SRAM).

Unplug the powsource, wait 10 the power cord.Chapter 6, “Tro

Config. Stuck Addr In Service Mode only, SRAM stuckaddress test.

Unplug the powsource, wait 10

the power cord.Chapter 6, “Tro

Config. Tied Addr. In Service Mode only, SRAM tied addresstest.

Unplug the powsource, wait 10 the power cord.Chapter 6, “Tro

Decoding Error#(number 1-3)

There was an error in decoding with theimage processing chip.

Unplug the powsource, wait 10 the power cord.Chapter 6, “Tro

Documents Were

Lost START toContinue

Power to the HP LaserJet 3100 product

was interrupted, and documents inmemory were lost.

Press START. Th

product prints alog status columDocument was the associated oincoming faxes,resend them.

Encoding Error There was an error in encoding with theimage processing chip.

Unplug the powsource, wait 10 the power cord.Chapter 6, “Tro

Message Cause Solution

Table 8. Control panel messages

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Fax Document wasLost

Faxes in memory were lost due to a powerfailure.

If you set up faxtime or to be poidentify which faenter the faxes If the HP LaserJto receive faxesprinting), any domemory also ha

the sender and resent.

Fax Memory Error#(number 1-5)

An error was detected in dynamicrandom-access memory (DRAM).

Unplug the powsource, wait 10 the power cord.service may be r

“TroubleshootinIf you set up faxtime or to be poidentify which faThen, re-enter tLaserJet 3100 preceive faxes toprinting), any do

memory also mawere expecting sender and requresent.

Group is Empty, UseONE-TOUCH/ SPEED DIAL

Appears when you are creating a group-dial code.

Begin adding fadial code by preone-touch key oentering the faxcode, and press

Input Limit Reached Too many fax numbers were dialed when The maximum n

Message Cause Solution

Table 8. Control panel messages

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Long Page?START to Continue

The HP LaserJet 3100 product senses adocument over 39 inches (991 mm), suchas a banner, may be feeding through thedocument feeder tray or that a paper jamhas occured.

Press START to you do not presseconds, the methe document sbecause it thinkIf you are sendidocument longemm), you can a

configuration towhich ensures twithout having tpress START bescanner shuts o

Memory Full - Send

Unscanned Pages

During the fax job the memory filled. All

pages of the fax have to be in memory fora fax job to work correctly. Only the pagesthat fit into memory were sent.

Reload the unsc

send them to finOr, scan the uncomputer and facomputer.

Memory is Full The HP LaserJet 3100 product’s memoryhas been completely filled during a copy

or a scan.

This message sautomatically w

(for example whreceive a fax).

Modem Error #(number 1-3)

An error was detected with the modem. Unplug the powsource, wait 10 the power cord.

No Answer You tried to send a fax, but the receivingfax line did not answer for all redialattempts.

Check the fax nthe fax. If the mtry sending to anagain later.

Message Cause Solution

Table 8. Control panel messages

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No Memory forReportErase/PrintDocument

Memory needed to print a report may bebeing used to store faxes that have beenreceived to memory.

Needed memory may be being used tostore faxes set up to be sent at a futuretime or to be polled.

Print faxes that memory.

If you have sevesent at a future clearing these fa

No Modem Installed There is a problem with the line interfaceunit (LIU).

Unplug the powsource, wait 10 the power cord.Chapter 6, “Tro

No Room in Fax Log The fax log was unable to print due to an

error, such as out of paper.

Load paper in th

HP LaserJet 31log.

Not Enough Memory There is not enough memory to completethe job indicated.

Try resending thpersists, try redactivity on the Hproduct and canbefore resendin

Out of MemorySwitching to ONECOPY

The HP LaserJet 3100 product does nothave enough memory to complete thecopy job.

The HP LaserJecopy, but only oDivide the copy and then try copIf you are collatcollation feature

the document aguide for instrucDocument Assis

N F P i Th HP L J t 3100 d t tt t d W it f f th

Message Cause Solution

Table 8. Control panel messages

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Paper Bin is EmptyPlease Add Paper

The paper input bin is empty. Load paper. If premove it. Chec

 jammed sheets reload the pape

Password must be 4Digits

Attempt was made to enter a passwordthat was not four digits.

Re-enter four-d

Paused (MemoryFull)

The HP LaserJet 3100 product’s memoryis full, and the current job in the documentfeeder tray is paused to wait for memoryto become available.

Reduce activity 3100 product, ofinish so memorIf there are faxesent at a future cancel these job

PC Print Timed Out The print job took too long to print, and theHP LaserJet 3100 product timed out.

Let the “print jobminutes. If the Hproduct still doeprint job.

Phone Number Error Too many characters were entered when

dialing a phone number.

The maximum n

that can be entenumber longer tbreak the numbEnter the first papress REDIAL /PA

character in theenter the secondit were a second

group. When thtreat both numb

Polling-In Error The HP LaserJet 3100 product tried to pollth f hi Th ll f il d

Make sure the sd t b ll

Message Cause Solution

Table 8. Control panel messages

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Printer Comm Error There was an error in communicating withthe HP LaserJet 3100 product.

Check that the pconnected betw3100 product anIf the problem pLaserJet 3100 pfrom the power and then replugIf neither of thes

Chapter 6, “Tro

Printer Comm Error^1

In Service Mode only. There was an errorin communicating with the HP LaserJet3100 product.

Check that the pconnected betw3100 product anIf the problem pLaserJet 3100 p

from the power and then replugIf neither of thesChapter 6, “Tro

Printer Cover Openor No Cartridge

The printer door is open or the tonercartridge is not installed properly.

Make sure the pCheck the toner

installation.

Printer Fixing ErrorReplace Fixing Unit

There is an error with the print engine. See Chapter 6,

Printer is Busy The HP LaserJet 3100 product istemporarily unavailable for other types of

printing (such as printing faxes or copies).

No action is neestarted another

copy job througtray and it was srequested a repbe completed w3100 product be

Message Cause Solution

Table 8. Control panel messages

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Printer Motor ErrorCall for Service

A problem has occurred with the printengine.

Unplug the powsource, wait 10 the power cord.Chapter 6, “Tro

Printer Paper JamCheck Paper Path

A paper jam has occurred. Check the inputand the interior

clear the jam. Tto print. If it doe

 job.

Printer signal error The printer door is partially open.

There was an error in the HP LaserJet

3100 product print unit.

Open and reclo

Unplug the pow

source, wait 10 the power cord.Chapter 6, “Tro

Receive Error An error occurred while the HP LaserJet3100 product was receiving a fax.

Call the sender resend the fax.

Redial Failed Attempts to redial a fax number failed. Try resending thto transmit, call that his or her faworking and to v

Remote Fax wasBusy

The fax number dialed was busy. Try resending thto transmit, call

that his or her faworking and to v

Scan ReferenceError

There was an error detected in the HPLaserJet 3100 product

Recalibrate the

Message Cause Solution

Table 8. Control panel messages

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Scanner isn’tAvailable

The document scanner mechanism is inuse.

Wait until the dofinished the currthe next job.

Scanner Jam -Reload

A document has jammed in the documentscanner area.

Pull open the doand then removdocument.

Speed Dial (number)is not Assigned

You tried to dial a speed-dial code thatdoesn’t have a fax number stored in it oryou assigned a non-defined one-touchkey to a group.

Choose a speedhave already as

System Error An error has occurred that may requireservicing. In some cases, the error can becleared by turning off the power, thenturning it on again.

Unplug the powsource, wait 10 the power cord.longer displayedsolved and you HP LaserJet 31If the message the three-digit emessage and se“Troubleshootin

There are NoDocuments inMemory

HP LaserJet 3100 product tried to printfaxes from memory when no faxes hadbeen received to memory.

No action is reqfaxes to retrieve

UnrecognizedFormat When printing, the incorrect printer driverwas selected or an error occured on theparallel interface.

After selecting thprogram from wselect the HP L

printer. Reprint

Message Cause Solution

Menu tree

Th f ll i h th l t f th

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The following page shows the layout of the menu hierarchical diagram. You may want to refer to thi

making changes to settings and features. To see tprint a configuration report. Current settings are masterisk (*).

The service menu and the extended service menuChapter 6, “Troubleshooting.”

To print a menu tree1 Press ENTER /MENU.

2 Use the < and > keys to select Reports and p

3 Use the < and > keys to select Print the MeENTER /MENU.

The HP LaserJet 3100 product exits the menu setmenu tree.

Table 9. Menu tree

Press ENTER/ Use the < and > keys

Use the < and > keys to

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Press ENTER / MENU toaccess theMenu.

Use the < and > keysto select one of thechoices below andpress ENTER /MENU.

Use the < and > keys toselect one of thechoices below andpress ENTER /MENU.

Job StatusFax Functions

Time/Date, Header

Reports

Copy Settings

Fax Settings

Delayed FaxReprint Last FaxesPrint FaxesClear MemorySend ConfirmationPolling

Time/DateFax Header

Fax Log

Transmission ReportsPhonebook

Print the MenuPrint Config ReportSelf TestPrint All

Default CollationNext Copy Size

Phonebook

Outgoing Faxes

Incoming Faxes

3

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3Maintenance

Chapter contents

Life expectancies of consumables . . . . . . . . . . .

Cleaning and maintaining the equipment . . . . . .

Cleaning the document scanner path . . . . . . . . . Cleaning the print path . . . . . . . . . . . . . . . . . . . . .

Using a cleaning page. . . . . . . . . . . . . . . . . . . . . .

Recalibrating the document scanner. . . . . . . . . .

Life expectancies of consumables

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Inspect the consumables when servicing the HP L

Replace consumables as needed, based on failurstrictly on usage.

The following table lists approximate schedules foconsumables.

Table 10. Life expectancies of consumables

Description Part number Estimated

life (pages)

Remarks

Toner cartridge (userreplaceable)

C3906A 2,500* When prinredistribut

Printer transfer roller RG5-3452-000CN(Transfer guide assembly)

50,000 Can affectpaper mov

Printer pickup rollerassembly

RG5-3486-000CN 50,000 Look for g

Printer separation padand subpads

RB1-7181-000CN(Separation armassembly)

50,000 Can affect

Heating element RG5-4678-000CN (110V)

RG5-4681-000CN (220V)

50,000 Can affect

paper mov

Pressure roller RF5-2362-000CN 50,000 Look for mor upper T

Document scanner pickuproller assembly

RG5-4688-000CN 25,000 Look for g

Document scanner

separation pad

RB2-3430-000CN 25,000 Can affect

Document scanner feedroller and documentscanner delivery roller

RG5-4223-000CN(Document scannerassembly)

25,000 Can affect

Cleaning and maintaining the equipme

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WARNING! Before you perform these steps, unplug the printehazard.

To maintain quality, thoroughly clean the HP Lase

q Any time a new toner cartridge is installed.

q After printing approximately 2,500 pages.

q

Whenever print quality problems appear.Clean the outside of the printer with a slightly wateClean the inside with only a dry, lint-free cloth (su

To avoid permanent damage to the toner cartridgammonia-based cleaners on or around the HP Laproduct.

WARNING! When cleaning around the printer door area, avoid telement. It might be very hot and can cause burns

CAUTION Do not touch the surface of the transfer roller. Coroller can cause print quality problems.

Note Be careful not to touch the glass surface of the iminadvertently touch the glass, clean it according tothe following pages.

Cleaning the document scanner path

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Clean parts of the do

the ink on items you asmudged with your hhave excessive amoon them. Also clean tare smudges or othedocuments or scans

WARNING!

Before cleaning the Hproduct, disconnect isource.

1 Open the docum

2 If the white sheetwith a dry cotton something on theswab in a small aalcohol and gentsheet.

CAUTIONWhen you use alcohosmall amount. Exposdripping alcohol can

3 If the glass surfaimage sensor is ddry cotton swab. something on thein a small amoun

1

2

3

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4 Inspect each of t

document scanndebris. Using a lidampened with aisopropyl alcoholrollers using a sid

CAUTIONDo not spray alcohol directly into the HP Lproduct. Doing so caproduct.

CAUTIONAs much as possiblewhite sheet and the galcohol.

5 Near the top, insdocument releasthree pressure feor debris. If they them with a lint-frwith a small amo

6 Close the docum

after allowing alc

4

5

6

Cleaning the print path

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Clean the print path t

quality if you frequennotice other marks o

WARNING!

Before cleaning the Hproduct, disconnect i

source.

1 Clean the outsidea slightly damp cwater).

CAUTION

Using ammonia-basearound the HP Lasercan damage it.

2 Use the two latchdoor to open it. C

the HP LaserJet dry, lint-free clothspilled toner, and

CAUTIONOnly use a dry, lint-frdust and toner. Usingdevice to clean insidedamage it. Also, do ntransfer roller. Touchthe print quality of ou

1

2

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6 Scrub the expose

front) of the pickuside-to-side motithe roller to cleansides.

7 Using a dry, lint-fexposed area of

using a side-to-s8 After the alcohol

has dried completoner cartridge adoor.

8

7

6

Using a cleaning page

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After you have clean

use this procedure tocleaning page, if neepage can help removyour printed pages.

To use a cleanin

1 Place a stack of sized paper into (Do not use thick

2 For Windows 95Explorer.- Or -For Windows 3.1Manager.

3 Open the JetSuitJetSuite Pro softto the default loc“C:\JetSuite”).

NoteIf you do not have accsoftware, a cleaning from the HP LaserJeaddress:http://www.hp.com/su

4 Double-click Cleathe cleaning pag

5 When the docum

1

6

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7 Place the cleanin

paper input bin, t8 Print a different f

9 Inspect the pageshiny, black spotblack strip, the pDiscard the pagehas been comple

10 If there are shinypage’s black stripcleaned from thethe page. Repeauntil there are no

on the page.

NoteIf toner specks appeaa frequent need to cltry using a different tymake sure the paperspecifications. If the psee Chapter 6, “Troudetailed information adefects and other imaproblems.

7

9

10

Recalibrating the document scanner

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Recalibrate the docu

notice that copies, itecomputer, or faxes yoor white lines running

To recalibrate thscanner

1 Clean the HP Lasbefore recalibrati“Cleaning the HPproduct” earlier in

2 On the control paMENU.

3 Press < once to dpress ENTER /MEN

4 Use the < and >Correction and

5 Insert a blank, brletter-sized pape

feeder tray.

6 The HP LaserJetthe piece of papeprints a recalibraDiscard this pageprocedure is com

5

6

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4 Functional overv

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4 Functional overv

Chapter contents

Basic functions . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printer functions . . . . . . . . . . . . . . . . . . . . . . . . . .

ECU/power system . . . . . . . . . . . . . . . . . . . . . . . .Formatter system . . . . . . . . . . . . . . . . . . . . . . . . .

Image formation system . . . . . . . . . . . . . . . . . . . .

Printer feed system . . . . . . . . . . . . . . . . . . . . . . . .

Document scanner system . . . . . . . . . . . . . . . . .

Basic sequence of operation (formatter-to-printer)

Basic functions

This chapter presents a functional overview of the

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This chapter presents a functional overview of theproduct’s processes. The following systems are d

q optical system (document scanner)

q ECU (engine controller unit) system/power sy

q formatter system

q image formation system

q

paper feed system (printer) and document fee(document scanner)

q laser/scanner system

q telecommunications system/line interface unit

The HP LaserJet 3100 product consists of the pridocument scanner. Operation sequences of the p

by the ECU. Operation sequences of the documecontrolled by the video controller.

FORMATTER

Printer functions

Printer functions are divided into four groups:

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Printer functions are divided into four groups:

q engine controlq image formation

q printer laser/scanner

q pickup/feed

The following figure is a block diagram of the prin

Figure 8. Printer unit functional block diagram

ECU/power system

The ECU coordinates all print engine activities, dr

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The ECU coordinates all print engine activities, drcoordinates print data from the formatter with the process. The ECU also includes power supply ancircuitry. The ECU controls the following systems

q print engine control

• laser/scanner drive

• paper motion photosensors (paper out, pap

paper exit sensors)• motor

q power system

• AC power distribution

• DC power distribution

• overcurrent/undervoltage protection• high-voltage power distribution

The following figure shows the various ECU loads

Formatter

Print engine control system

Printer laser/scanner drive

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Based on information received from the formattersignals to the laser/scanner assembly to modulate“on” and “off” and to drive the laser/scanner motoinformation, see “Image formation system” later in

Paper motion monitoring and control

The ECU controls paper motion by continuously mvarious paper sensors and coordinating the timingprocesses.

For a detailed explanation of paper movement, anphotosensors and solenoid with the paper movemthe “Printer feed system” section later in this chap

12-volt DC power shutoff switch

The 12-volt DC power shutoff switch (SW101), locthe printer, is activated by the printer door. The froclosed before the printer can resume printing.

Engine test switchThe engine test switch (SW201), located on the Emanually from the bottom of the HP LaserJet 310switch causes the print engine to perform a self-dbypasses the formatter and prints a full page of bThis test is useful for troubleshooting printer probl

isolates the print engine from the formatter. (See section of Chapter 6, “Troubleshooting,” for more engine tests.)

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High-voltage power distribution

The high-voltage power supply PCA applies an ovvoltage to the primary charging roller and the devecircuit also applies a positive or negative DC volta

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circuit also applies a positive or negative DC volta

roller according to the instructions from the ECU.This circuit also controls the image density by chaAC voltage and the developing AC bias accordingsetting.

High voltage is disabled when SW101 is open (in the printer door is open).

Figure 10. High-voltage power supply circuit

Formatter system

The formatter is responsible for the following:

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q controlling the document scannerq formatting and controlling faxes

q formatting and controlling copies

q receiving and processing print data from the p

q monitoring the control panel and relaying prininformation

q developing and coordinating data placement aprint engine

q communicating with the host computer througinterface

The formatter receives print data from the bidirect

and converts it into a dot image. The ECU synchrformation system with the paper feed system andformatter to send the print image data. The formaimage data (dots) in the form of a video signal andprocess begins.

Central processing unitThe formatter incorporates a Motorola 68030 custoperating at 25.2 megahertz (MHz).

Memory

Memory can be cleared by removing the formatteinformation about removing the formatter board, s“Removal and replacement.”

Random-access memory (RAM)

q One bank of RAM, which is battery-backed, sAnother two banks of RAM are used for temp

q DRAM (Dynamic RAM) provides temporary st

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q DRAM (Dynamic RAM) provides temporary st

scan, and print data.

Parallel interface

The formatter receives incoming data through its interface. This interface provides high speed and

communication between the printer and the host, change printer settings and monitor printer status computer.

Control panel

q two front panel status lights

q control panel keyboard

q control panel display

Draft mode

Depending on the printer driver, selecting a “draftmode from the printer driver allows the HP LaserJuse approximately 50% less toner, extending the cartridge. This is only available using printer driveprinting or making copies from the software.

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CAUTION The printer's toner cartridge does not include a ligBe careful to avoid exposing the drum to light, whidamage the drum. Protect the cartridge whenever printer.

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p

Step 1: Primary charging

This process consists of applying a uniform negatsurface of the drum with the primary charging rolltoner cartridge. The primary charging roller is coa

rubber. An AC bias is applied to the roller to erasecharges from any previous image. In addition, a napplied by the charging roller to create a uniform on the drum surface. The amount of DC voltage isprint density setting.

Step 2: Scanning exposureDuring this process, a modulated laser diode proja rotating scanning mirror. As the mirror rotates, ththe mirror, first through a set of focusing lenses, thfinally through a slot in the top of the toner cartridgphotosensitive drum. The beam sweeps the drum

discharging the negative potential wherever the bsurface. This creates a latent electrostatic image, developed into a visible image.

Because the beam is sweeping the entire length odrum is rotating, the entire surface area of the druAt the end of each sweep, the beam strikes the begenerating the beam detect signal (BD signal). Thto the ECU, where it is converted to an electrical ssynchronize the output of the next scan line of da

Step 4: Transferring

During the transferring process, the toner image ois transferred to the paper. A positive charge applthe paper by the transfer roller causes the negativ

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the paper by the transfer roller causes the negativ

on the drum surface to be attracted to the paper. Adrum is cleaned and conditioned for the next imag

Step 5: Separating

During the separating process, the paper separat

To stabilize the feed system and prevent dropoutsimage at low temperature and humidity, the chargpaper is reduced by the static charge eliminator.

Step 6: Drum cleaning

The cleaning blade is in contact with the surface otimes. As the drum rotates during printing, excessand stored in the waste toner receptacle.

Fixing stage

During the fixing process, the toner is fused into th

and pressure to produce a permanent image. Thebetween a heated fusing element and a soft pressmelts the toner and presses it into the paper.

Printer feed system

Both the paper input bin and the single-sheet inpuone main input area Paper placed in either of the

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one, main input area. Paper placed in either of thethe paper-out sensor (PS202), which informs the present.

When the printer receives a print job and is readyenables the laser/scanner assembly and the motobegins when the ECU energizes solenoid SL1. Thpickup roller to rotate once. Two actions occur as

rotation. First, the paper kick plate pushes the pappickup roller. Second, the pickup roller grabs the tadvances it to the feed assembly drive rollers. To one sheet is fed, a main separation pad and two sremainder of the stack in place.

The feed assembly drive rollers advance the pape

registration photosensor (PS203). This sensor infoexact location of the paper's leading edge, so thatwritten on the photosensitive drum can be precisepage. The feed assembly drive rollers then advantransfer area where the toner image on the photostransferred to paper.

After the image is transferred, the paper enters thwhere heat from the fuser and pressure from the permanently bond the toner image to paper. The (PS201) determines that paper has successfully mfusing area. The fusing assembly exit rollers delivthe paper output bin or the front paper output slotthe position of the face-up/face-down lever.

The following figure shows a simplified printer pap

31 2

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Figure 12. Simplified paper path

1 Face-up output path

2 Document output support

3 Face-down output path

4 Single-sheet input slot5 Paper input bin

6 Delivery roller

6

87 9 10 11

Paper jam detection

The paper out sensor (PS202), paper registrationand the paper exit sensor (PS201) detect paper mHP LaserJet 3100 product. If a paper jam is detec

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immediately stops the printing process and displamessage on the control panel.

A paper jam can be detected under any of the foll

q Power-on jams. Paper is present under either power-on.

q

Pickup jams. Paper does not reach and clear pwithin a specified period of time. The time periPaper Pickup Solenoid (SL1) is energized.

q Delay jams. Paper does not reach or clear a swithin a specified period of time.

Solenoid, photosensors, and swi

The following figure shows the locations of the sophotosensors, and switches.

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Figure 13. Solenoid, photosensors, and switc

21 3 4

1 Pickup solenoid (SL1). Enables the pickup roller.

2 Paper registrationsensor (PS203).

Detects the leading and trailing edges of thSynchronizes the photosensitive drum and

3 Door open/cartridge

sensor (SW101).

Detects whether or not the printer door is c

cartridge is present. Printing cannot continudoor is closed and the toner cartridge is in i

4 Paper out sensor(PS202).

If the sensor does not sense paper in the psingle-sheet input slot, the control panel dis

Document scanner system

The document scanner system consists of the optdocument pickup and feed systems.

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The optical system, also known as the contact imcontains the following:

q light-emitting diode (LED) array

q contact glass

q rod lens array

q phototransistor array

The LED array, which emits light from two types ofby the formatter. The contact glass refracts the ligLight reflected from documents passes through ththe phototransistor array.

The phototransistor array consists of 2,574 phototcircuits that amplify the light reception output in unphototransistors. The image data is converted anddriver circuits to the formatter.

The document pickup and feed systems contain afeed roller, and a delivery roller, all of which are ddocument scanner motor. There are also two phodocument path. PS801 detects the presence of a PS802 detects the leading edge of a document.

The following figure shows a simplified Documentpath.

31 2

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Figure 14. Simplified document path

1 Document output support

2 Document delivery roller

3 Document feed roller

4 Document input bin

5 Contact image sensor

6 D t i k ll

4

5 6

Basic sequence of operation (formatte

The formatter and the ECU share information duroperation. The ECU-to-formatter connector (J201

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operates as a serial data bus. This allows printer information, and dot-image data to be passed betfollowing events take place during normal printer

Table 12. Timing

Period Purpose Re

WAIT (WAIT period)From power ON to the end of theinitial rotation of the main motor.

To clear the drum surface of itscharge and to clean the transfercharging roller.

STBY (STANDBY)From the end of the WAIT period or

the LSTR period until the input ofthe /PRNT signal from the videocontroller. Or from the end of theLSTR period until power OFF.

To maintain the printer in readymode.

INTR (INITIAL ROTATION period)From the input of the /PRNT signalfrom the video controller until the

end of the APC operation.

To stabilize the photosensitivedrum sensitivity in preparationfor printing. Also to clean the

transfer charging roller.PRINT (print)From the end of initial rotation untilthe motor stops.

To form images on thephotosensitive drum based onthe /VDO signal from the videocontroller and transfers thetoner image to paper.

LSTR (LAST ROTATION period)From when the primary highvoltage (DC) goes OFF until themain motor stops.

To deliver the last page. Also toclean the transfer chargingroller.

TheINT /PRfrom

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5 Removal andreplacement

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Chapter contents

Removal and replacement strategy. . . . . . . . . . .

Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Document scanner assemblies . . . . . . . . . . . . . .

Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . .

Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . .

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Required tools

q #1 Phillips screwdriver with a magnetic tip

q #2 Phillips screwdriver with a magnetic tip

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q small flatblade screwdriver

q needlenose pliers

q ESD mat

A 5.5 mm hexhead nutdriver might also prove userequired.

CAUTION A Posidriv screwdriver will damage screw heads o3100 product. Use Phillips only.

Covers

Back cover

1 U l th d d h d( ) d

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1 Unplug the power cord and phone cord(s) andparallel cable from the back of the printer.

2 Remove all supports and bins.

3 Press the printer door release latches and op

4 Remove the toner cartridge.

5 Rotate the HP LaserJet 3100 product so that ythe product.

6 Remove the four (4) screws (callout 1) from th

21

7 Insert the small flatblade screwdriver into the at the top of the back cover to pop the upper c

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Figure 17. Back cover removal (2 of 2)

8 Remove the back cover by grabbing it on bothaway.

To reinstall

After placing the back cover in its correct positioncover and the paper input tray together to secure

21

Right side cover

1 Remove the back cover.

2 Rotate the HP LaserJet 3100 product so that side.

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3 Remove one (1) screw (callout 1) from the topcover.

Figure 18. Right side cover removal

4 Pop the latches at the top of the cover.

5 Remove the cover by lifting it up and off the la

21

Left side cover

1 Remove the back cover.

2 Rotate the HP LaserJet 3100 product so that ythe product.

3 P h l h h d b ( ll

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3 Pop the latches at the top and bottom (calloutthe product.

Figure 19. Left side cover removal

4 Remove the left side cover by rotating it awaythe front of the product.

21

Left front cover

1 Remove the back cover and the left side cove

2 Rotate the HP LaserJet 3100 product so that y

3 Remove the pressure release lever cover byfl tbl d d i i t th l t ( ll t 1) t

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3 Remove the pressure release lever cover by flatblade screwdriver into the slot (callout 1) toand then pressing up from the left side of the

4 Remove one (1) screw (callout 2) from the topcover.

Figure 20. Left front cover removal

2

21

2

Top cover

1 Remove the back cover, the right side cover, and the left front cover.

2 Remove one (1) screw (callout 1) from the top

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Figure 21. Top cover removal

3 Lift the top cover off the product.

4 Lift the input bin straight up and away from th

21

RFI shield

1 Remove all covers.

2 Remove the five (5) screws (callout 1) from th

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Figure 22. RFI shield removal

3 Remove the RFI shield by lifting the shield up(callout 2).

2

22

1

Document scanner assemblies

Printer door

1 Press the printer door release latches and op

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p p2 Remove all covers and the RFI shield.

3 Pull the four (4) cables (callout 1) from the covertically along the right side of the formatter open tie-wrap that holds all four cables to rele

4 Remove the three (3) grounding screws (callo

Fi 23 P i d l (1 f 3)

21

5 Remove the printer door cable guide (callout and lifting it out.

6 Remove the spacer (callout 2) by releasing thand then lifting it out.

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Figure 24. Printer door removal (2 of 3)

2

21

2

7 Rotate the HP LaserJet 3100 product so that

Tabs on the printer door hinge covers prevent thebecoming dislodged. The tabs flex inward (towardproduct) to release the hinge covers.

8 Beginning with the left hinge cover, use the smscrewdriver to pry the tab inward

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screwdriver to pry the tab inward.

9 When the hinge cover is released from the prihinge cover up and then slide it off the hinge.

Figure 25. Printer door removal (3 of 3)

10 R t th d t th i ht hi

Document release door

Note Although it is possible to separate the document reprinter door without opening or removing the printrecommends that you remove the printer door befcomponents of the document release door.

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1 Remove the printer door from the HP LaserJe

2 Release the interlocks (callout 1) on each siderelease door and lift open the door (callout 2)

Figure 26. Document release door removal (1

2

21

2

4 To release the right hinge of the document reprinter door, use one hand to simultaneously of the document release door toward the left adoor frame to the right.

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Figure 27. Document release door removal (2

5 Lift out the right side of the document release it to the right to release the left hinge.

Upper guide assembly

1 Remove the four (4) screws (callout 1) from thassembly.

2 Lift up and rotate the assembly toward you.

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Figure 28. Upper guide assembly removal (1 o

21

3 Remove the screw (callout 1) from one of the boards.

4 Release two (2) cables (callout 2) from their ceach of the small printed circuit boards.

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Figure 29. Upper guide assembly removal (2 o

To reinstall

Make sure that the assembly is inserted correctly notches.

21

Contact image sensor

1 Remove the document scanner guide by liftinpressing the two tabs at the left side of the as

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Figure 30. Contact image sensor removal (1 o

2 Release the contact image sensor and its moremoving the two (2) screws (callout 1) from t

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Figure 31. Contact image sensor removal (2 o

3 Lift up the contact image sensor and its moun

4 Remove the grounding screw and the cable frthe contact image sensor.

Note Clean the scanner glass after the contact image s

Document scanner assembly/mo

1 Remove the document scanner guide by liftinpressing the two tabs at the left side of the as30).

2 Remove the two (2) screws (callout 1) from thscanner assembly.

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Figure 32. Document scanner assembly/moto

3 Use firm pressure to lift the document scannesliding it in the direction of the input bins to relscanner assembly

The scanner motor is located on the left side of thscanner assembly.

4 Remove the two (2) screws (callout 1) from thscanner motor.

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Figure 33. Document scanner assembly/moto

5 Lift the document scanner motor straight out.

To reinstall

Reinstall the document scanner motor to the sameits removal if the motor is not reinstalled to the sa

21

Document scanner pickup roller

It is possible to remove the document scanner picremoving the document release door. However, thdetail pickup roller removal with the assumption th

release door has already been removed.1 Remove the document scanner guide by liftin

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pressing the two tabs at the left side of the as30).

2 Use the small flatblade screwdriver to pry thepickup roller shaft from its plastic mounting.

Figure 34. Document scanner pickup roller re

Internal assemblies

LIU board

1 Remove the back cover.2 Pull out slightly the connector for the flat, flexi

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to release the cable and disconnect the cable

3 Remove the three (3) screws (callout 2) from

.

Figure 35. LIU board removal

22

Formatter board

1 Remove all covers and the RFI shield.

2 If the LIU board has not been removed from tslightly the connector for the flat, flexible cable

left side of the formatter board to release the disconnect the cable from the formatter board

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3 Pull out slightly the connector for the flat, flexiat the bottom of the formatter board to releasethen disconnect the cable from the formatter b

Figure 36. Formatter board removal (1 of 2)

2

2

1

2

4 Pull the four (4) cables from the connectors (cvertically along the right side of the formatter open the tie-wrap that holds all four cables to

CAUTION When step 5 below is performed, all memory is cl

formatter, including country-specific settings. Clearender the product illegal or inoperable. See the s“Troubleshooting ” about softswitches to restore t

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Troubleshooting, about softswitches to restore t

5 Remove the remaining screw from the formatt

Figure 37. Formatter board removal (2 of 2)

21

Metal side plate

1 Remove all covers, the LIU board, the RFI shformatter board.

2 Remove the two (2) screws (callout 1) from th

and lift the grounding plate from the product.3 Remove the three (3) grounding screws (callo

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Note Upon reinstallation, make sure that you reinstall thto their correct locations.

4 Release the cable guide from the frame (callo5 Remove the remaining two (2) screws (callou

side plate.

2

23

24

1

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Delivery assembly

1 Remove all covers, the RFI shield, the printerroller.

2 Remove the cartridge guide by pressing in the

sliding the guide toward the front of the HP Laproduct (callout 2).

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Figure 40. Delivery assembly removal (1 of 2)

2

2

1

2

3 Use the magnetic screwdriver to remove the t(callout 1).

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Figure 41. Delivery assembly removal (2 of 2)

4 Rotate the rear of the delivery assembly up anout of the printer.

Note Upon reinstallation, the tabs on the front end of the

must fit under the sheet metal fuser plate below to delivery assembly.

21

Fuser pressure plate

1 Remove all covers, the RFI shield, the printer and the delivery assembly.

2 Remove the two (2) screws (callout 1).

3 Press the fuser plate retainer clips out (calloupressure plate.

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4 Rotate the plate around and toward the back (to remove it.

Figure 42. Fuser pressure plate removal

2

23

21

2

To reinstall

The fuser pressure plate is held in place by four loin each corner. Place the rear slits in the plate ovethat hold the fusing assembly (callout 1). Lower thretaining clips, pressing on both sides of the fuser

(callout 2). It is important that the spring is placed pin (callout 3) because inadequate pressure will cproblems. Replace the screws.

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p ob e s ep ace t e sc e s

Figure 43. Fuser pressure plate replacement

Front casing

1 Remove all covers, the RFI shield, and the pr

2 Remove the two (2) screws (callout 1) from th

Note The lower screw on each of the hinge holders secgrounding plate. Upon reinstallation, make sure thare in the correct position.

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a p s

Figure 44. Front casing removal

3 Lift the right hinge holder from the frame.

21

Heating element

1 Remove all covers, the RFI shield, the printer the delivery assembly, the fuser pressure platcasing.

2 Disconnect the AC voltage to the heating elemthe connector located on the ECU. Press dowrelease with the small flatblade screwdriver (cthi i ll it i h i t h

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this is a small space, it is much easier to reacha screwdriver.) Pull the connector straight out

Figure 45. Heating element removal (1 of 2)

21

22

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Pressure roller

1 Remove all covers, the RFI shield, the printer the delivery assembly, the fuser pressure platand the heating element.

2 Remove the pressure roller guide by lifting theand then rolling it gently backward (callout 2).

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Figure 47. Pressure roller guide removal

3 Lift the right end of the pressure roller up andchassis.

22

Face-up/face-down lever

1 Remove all covers, the RFI shield, the printer the delivery assembly, the fuser pressure platthe heating element, and the pressure roller.

2 Rotate the lever forward 90 degrees (past thestraight out the front of the printer.

T i t ll

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To reinstall

1 Make sure the lever arm is on the left and is idownward.

2 Pull the spring forward using needlenose plie

3 Slide the short, round tabs into the grooves oguide assembly. The machined ridges on the

4 Release the spring so it falls in place in front o

Fuser exit roller assembly

1 Remove all covers, the RFI shield, the printer the delivery assembly, the fuser pressure platthe heating element, the pressure roller, and down lever.

2 Remove the gear from the left end of the rolledown on the catching mechanism with the smscrewdriver and pulling the gear away

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screwdriver and pulling the gear away.

3 Remove the exit roller assembly by pressing tupward (callout 1) and rotating it around (callo

4 Slide the exit roller assembly forward and outprinter.

22

21

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Laser/scanner assembly

1 Remove all covers.

2 Remove both laser/scanner connectors.

3 Remove the four (4) screws (callout 1).

4 Lift the assembly straight off.

N t O f th f i l th th th th

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Note One of the four screws is longer than the other thrreinstallation, the longer screw must be replaced in

Figure 51. Laser/scanner assembly removal

21

Solenoid

1 Remove all covers, the RFI shield, the LIU boboard, and the metal side plate.

2 On the left side of the printer, remove the pap

(callout 1) by pressing the tabs in the center oand pulling the gear off.

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Figure 52. Solenoid removal (1 of 2)

21

3 Remove the solenoid connector (callout 1) fro

4 Remove the self-tapping screw (callout 2) thain place.

5 Unthread the wires from the printer chassis.

6 Lift the solenoid off.

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Figure 53. Solenoid removal (2 of 2)

To reinstall

The paper pickup gear is keyed to go on the shaft

2

2

1

2

Pickup roller assembly

1 Remove all covers, the RFI shield, the printerboard, the formatter board, the metal side plapickup gear.

2 Remove the pickup roller grounding clip on thby lifting each end of the clip up and over the and sliding the clip off.

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Figure 54. Pickup roller assembly removal (1

3 Using needlenose pliers, pull the bottom of th(callout 1), then turn it counterclockwise (callo

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Figure 55. Pickup roller assembly removal (2

4 Lift the bushing out.

5 From inside the front of the printer, slide the rpickup roller assembly forward, then lift the le

2

2

1

2

To reinstall

After placing the pickup roller shaft through on the idler roller tabs while repositioning the right side. Rand forth until the pickup roller and the idler roller reinstalled.

Note It is important that the pickup roller is placed back roller tabs up, so that they fit into the underside ofbehind the laser/scanner assembly.

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behind the laser/scanner assembly.

Figure 56. Paper pickup roller assembly repla

Paper feed frame

1 Remove all covers, the RFI shield, the printerboard, the formatter board, the metal side platgear, and the pickup roller assembly.

2 Disconnect the following:• Solenoid from the ECU at J204 (see Figure

• Two connectors from the laser/scanner anfrom SW101 (callout 1)

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from SW101 (callout 1).

Figure 57. Paper feed frame removal (1 of 3)

21

3 Remove the four (4) screws (callout 1) from thplate and lift it off.

4 Remove the four (4) screws (callout 2) from th

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Figure 58. Paper feed frame removal (2 of 3)

2122

5 Release the sensor unit connector (callout 1).

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Figure 59. Paper feed frame removal (3 of 3)

6 Verify that all cables are clear of the frame anstraight back to remove it.

To reinstall

The paper feed frame may be easier to reinstall if

printer on its front, so that you can apply pressurescrews back in place.

21

Transfer roller guide and transfer

1 Remove all covers, the RFI shield, the printerboard, the formatter board, the metal side platgear, the pickup roller assembly, and the pap

2 Looking at the back of the printer, note the twshaped release tabs on each end of the transUsing the small flatblade screwdriver, carefuloutward to release it.

3 R ll h l d i f h id T

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3 Roll the released portion of the guide up. To rroller guide, pull it off each end of the transferexposes the transfer roller.

Kick plate

CAUTION Be careful working with the kick plate and separatunderneath the kick plate might stay attached to thalso likely to spring away from the kick plate. Place

separation pad disassembly.1 Remove all covers, the RFI shield, the printer

board, the formatter board, the metal side platgear, and the pickup roller assembly.

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2 Press the separation pad.

3 Allow the kick plate to pivot upward (a spring push it up) and lift the kick plate off its mounti

To reinstall

If the spring on the kick plate does not remain attaplate, replace the spring, making certain the diamsurrounds two lower pins on the kick plate and respin. Use needlenose pliers to place the spring cor

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Figure 62. Kick plate spring replacement

While rotating the kick plate into place, guide the spring onto the silver grounding plate located on tframe.

Separation pad

1 Remove all covers, the RFI shield, the printerboard, the formatter board, the metal side platgear, the pickup roller assembly, and the kick

2 Lift the bottom of the white plastic tab (callout paper feed frame up slightly and slide it up, topaper feed frame. This will release the separa

3 Lift the separation pad 90 degrees and slide itof their retainers

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of their retainers.

Figure 63. Separation pad removal

Subpads

Note When you replace the separation pad, you shouldsmaller subpads.

1 Place your index finger on the subpad.

2 Press toward the top of the printer.

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Figure 64. Subpad removal

Feed assembly

The feed assembly is located in the paper feed fra

1 Remove all covers, the RFI shield, the printerboard, the formatter board, the metal side plat

gear, the pickup roller assembly, and the pap2 Turn the paper feed frame upside down.

3 Remove the feed roller shaft by lifting the plasand sliding it out the side (callout 2) of the pap

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Figure 65. Feed assembly removal (1 of 3)

2

2

1

2

4 Remove the self-tapping screw (callout 1) thaassembly in place.

Note Before proceeding, examine the tabs and how the(callout 2). The tabs must be reinstalled to exactly

5 Remove the feed assembly.

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Figure 66. Feed assembly removal (2 of 3)

21

22

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Bottom assemblies

Cable guide

1 Remove all covers, the RFI shield, the printer

board, the formatter board, and the metal side

2 Two tabs hold the cable guide on the printer ctab inward.

3 Pull the cable guide out.

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g

Figure 68. Cable guide removal

Main Motor

1 Remove all covers, the RFI shield, the printerboard, the formatter board, and the metal side

2 Remove the motor connector (callout 1).

3 Remove two (2) motor screws (callout 2).4 Lift the motor out.

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Figure 69. Motor removal

21

ECU

Remove all covers, the RFI shield, the printer doorformatter board, the metal side plate, and the fron

1 Disconnect the motor connector from the mot

2 Release all connectors from the ECU.3 Tip the printer on its top, with the front facing

4 Remove the five (5) screws (callout 1) from th

One of the screws is a grounding screw The loca

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One of the screws is a grounding screw. The locagrounding screw is marked by a star etched into t

Note Make certain when you reinstall the ECU that the gthe washer is replaced in the same location.

21

5 Lift the bottom plate and release the fusing as(callout 1).

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Figure 71. ECU removal (2 of 4)

6 Lift the bottom plate from the product and pla

CAUTION Placing the ECU on a conductive surface can damthe ECU on an ESD mat.

7 Squeeze the speaker cover to release it from and lift it off the bottom plate.

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Figure 72. ECU removal (3 of 4)

8 Remove the (7) remaining cables.

9 Remove the screws (5) that secure the ECU t

2

2

2

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Figure 73. ECU removal (4 of 4)

10 Remove the ECU by lifting gently on the side formatter, then sliding it out.

Note When ordering, the ECU does not come with any cables from the product on which you are working“Parts and diagrams,” for ordering information.

2

2

2

1

1

2

Feet

1 Insert the small flatblade screwdriver into the tab.

2 Lift off the foot.

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Figure 74. Feet removal

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Basic troubleshooting

Verification steps Possible problems Solution

Is Power On successful?When the product is connected toa grounded power source, theprinter motor should rotate forapproximately six seconds and thedocument scanner motor should

f i l

No power. 1. Verify thplugged in2. Verify thfunctional3. Verify thnot open.

If ll f

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rotate for approximately twoseconds.

Printer motor does not rotate.

Document scanner motor does notrotate.

4. If all of tcorrect, re

1. Verify thpresent.2. Verify thclosed.3. Verify thpaper inpu4. Verify th

sensors a5. Verify thJ1 is seate6. Verify thmounted t7. If all of tcorrect, re8. If, after

printer moreplace th

1. Verify thscanner min the form2. Verify thscanner m

mounted iassembly.3. If these

Is the product ready?The control panel should functionwithout error messages.

Control panel display an errormessage, such as “EncodingError.”

Control panel is not functional.

Control panel does not function

Consult thmessagescorrect the

Verify that

is seated ipanel at J9board at Jconnectedcontrol pa

1. Verify th

Verification steps Possible problems Solution

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pcorrectly.

ycable is se

control paformatter b2. Use themenu, if avpanel tests3. If, after tests, the cnot functio

control pa4. If after rpanel, thenot functioengine teslater in this5. If the ensuccessfu

-Or-If the engireplace th

Do engine tests and internalreports print?Print an engine test, which isdiscussed later in this chapter.The engine test should print

without paper feed problems orprint quality problems. Also printinternal reports (follow the

Engine test is not successful.

Internal reports do not print.

Poor print quality.

Replace th

If the engininternal rereplace th

See “Solvin this cha

Is the copy function operational?Place the reports into thedocument scanner input bin andcopy them to the printer. Reportsshould feed smoothly through the

document scanner path andcopies should print without printquality problems.

Poor copy quality. If the printreports anacceptablethe copiesimage sen

and then rscanner. (“Maintenarecalibratiperformingproblem pcontact im

Verification steps Possible problems Solution

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Paper does not move smoothlythrough the document scannerpath.

Configuration set incorrectly.

Clear the dof obstrucphotosensto make sucorrectly. replace door guides

Review anDoes the product send a fax?Connect the phone line and verifythe dial tone (using a hand set, ifnecessary). Attempt to send a fax.

Telephone line is not operationalor the product is not plugged intothe telephone line.

The telephone cord is plugged into

the wrong connector.

Product’s fax settings are setincorrectly.

The LIU is not operational.

Make sureplugged inyou know DIAL and lcheck the

In some co

LaserJet 3connectorphone corconnector

Review ansettings.

Replace thDoes the product receive a fax?Use another fax machine to send

Too many telephone devices areplugged in or telephone devices

Make the product th

Does the product print from thecomputer?Connect the parallel cable to theproduct and the computer. Use aword processing application to

send a print job to the printer.

The parallel cable is notconnected.

An incorrect printer driver isselected.

Other devices are connected tothe parallel port.

There is an LPT port driverproblem in Windows 95.

Connect th

Reset the

Disconnectry again t

Reset the settings.

Does the product scan to the Other devices are connected to Disconnec

Verification steps Possible problems Solution

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Does the product scan to thecomputer?

Initiate a scan from either thecomputer’s basic desktop softwareor from the product.

Other devices are connected tothe parallel port.

The BIOS settings for the parallelport are set incorrectly.

The computer’s parallel port

hardware is not bidirectional.

Disconnectry again t

Reset the settings. Ifreset the B(See the uinformatio

Check har

see if the pchanged.

Does the product send a fax fromthe computer?Initiate a fax from the computer’sbasic desktop software. Initiateanother fax, this time using a “print

to fax” command from anapplication.

An incorrect fax driver is selected. Reset the

Error messages

These control panel messages are listed alphabeaccompanied by the cause for the message and sresolve the problem.

Message Cause Solution

ConfigurationErr # (number 1-4)

An error was detected in the SRAM. Unplug the powsource, wait 10 th d

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the power cord.

If the error persformatter.

Config. Stuck Addr In Service Mode only, SRAM stuckaddress test.

Unplug the powsource, wait 10 the power cord.If the error persformatter.

Config. Tied Addr. In Service Mode only, SRAM tied addresstest.

Unplug the powsource, wait 10 the power cord.If the error persformatter.

Decoding Error#(number 1-3)

There was an error in decoding with theimage processing chip.

Unplug the powsource, wait 10 the power cord.If the error persformatter.

Encoding Error There was an error in encoding with theimage processing chip.

Unplug the powsource, wait 10 the power cord.If the error pers

Keypad Test Failed In Service Mode only, the keypad testfailed.

Check the cablithe keypad test If the error pers

panel.Run the keypadIf, after replacinerror persists, re

Modem Error #(number 1-3)

An error was detected with the modem. Check the cabliIf the error pers

Message Cause Solution

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(number 1 3) If the error perscord from the po

seconds, and reIf the error persIf, after replacinpersists, replace

No Modem Installed There is a problem in the LIU. Unplug the powsource, wait 10

the power cord.If the error persIf, after replacinpersists, replace

Nov-22-93 06:30 PM(or any other

incorrect date thatcannot be reset tothe correct date)

The battery inside the HP LaserJet 3100product has failed, causing all Menu

features to revert to the factory settings.Settings that contained alphabetic andnumeric characters you entered, such asheader information and speed-dial namesand numbers, have been erased.

Replace the form

Printer Fixing ErrorReplace Fixing Unit

There is an error in the print engine. Check the cabliheating elemen

Perform the “Hewhich is discussIf the error pers

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Image formation troubleshooting

Check the toner cartridge

Image formation defects are many times the resu

problems. If there is any doubt, always replace thbefore troubleshooting image defects.

Use the following checklist to ensure that the toneoperable.

ο Ensure that the toner cartridge is seated prope

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ο Inspect the toner cartridge for remaining tonerο Check the expiration date stamped on the tone

ο Check the toner cartridge to see if it has been refilled.

ο Inspect the cartridge to see if toner is leaking t

ο Check the surface of the photosensitive drum see if it has been damaged or scratched. Touccontaminates the photosensitive surface and cand image defects.

ο Blurred areas on printed pages indicate that th

drum in the cartridge has been overexposed tooverexposure to light causes permanent damaphotosensitive drum, the cartridge should be r

Note A toner cartridge weighs 730 grams (26.1 ounces640 grams (22.7 ounces) when it is empty.

To redistribute toner in the cartridge

Solving image quality problems

Use the following table to help solve problems witSee also “Solving paper feed problems” in this ch

Problem Cause Solution

Parts of the pagearound the edgesaren’t printing.

The HP LaserJet 3100 product cannotprint to the edge of the paper. The HPLaserJet 3100 product has minimummargins on each edge of 0.25 in (6.4 mm).

If printing or copying, the reduction setting

To get the image area, slightly redu

For printing, check

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If printing or copying, the reduction setting

is set incorrectly.

For printing, check

the “Print” or “Setuthe program you acheck the reductiopanel or from the

Images will notprint.

The HP LaserJet 3100 product is notplugged in.

The parallel cable is loose.

Make sure that theproduct is plugged

power strip.

Check that the paconnected betweeproduct and the co

Faxes you send,copies, orscanned imagesare too light or toodark.

The contrast is not set correctly.

The original image is very light or verydark.

The scanned image is too light or too darkbecause the original was on a coloredpaper.

Adjust the contrasfrom the control pAssistant.

Adjust the resolutsetting(s) from theafter you click Sca

Assistant.

If the original wasincluding a brown may not be clear. contrast and/or b

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Light charactershadows orrepetitive marksappear on thepage.

A roller is damaged.

The HP LaserJet 3100 product needs tobe cleaned.

If you are using transparencies, they donot meet HP’s specifications.

The paper’s texture is too coarse

Use the “Repetitivlater in this chapteroller is damaged.

See the appropria“Maintenance.”

Make sure that thespecifications detaspecifications guid

Try changing to a

Problem Cause Solution

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The paper s texture is too coarse.

The toner cartridge is damaged, causing arepetitive black flaw on every printout.

The toner cartridge’s photosensitive drumhas been overexposed to bright light,causing repetitive defects (usually a fuzzy

black area).

Try changing to a finish.

Replace the toner

Replace the toner

Character voidsappear (whiteareas within theparts of charactersthat should be

solid black).

The paper or transparencies do not meetHP’s specifications.

You are printing on the wrong surface of

the paper.

Make sure that thespecifications detaspecifications guid

Remove the pape

(The wrapper on mhas an arrow indic

Background Background scatter results from bits of Try changing the p

The page iscompletely black.

The toner cartridge was improperlyinstalled.

The toner cartridge is defective.

Discontinuities exist in the high-voltagecontact points.

There is a problem in the ECU or thelaser/scanner.

Remove the cartri

Replace the toner

Perform the “Highcheck,” which is dchapter.

Follow the steps itroubleshooting” toReplace the ECU

Problem Cause Solution

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Replace the ECU

needed.

Characters areonly partiallyprinted (alsoreferred to asdropouts).

A single sheet of paper is defective.

The print density needs to be adjusted.

The moisture content of the paper isinconsistent or the paper has moist or wetspots on the surface.

The paper was damaged by inconsistentmanufacturing processes.

A “draft mode” or “economy mode” isselected in the software.

Try reprinting the

Adjust the print depanel.

Make sure that thespecifications detaspecifications guid

Make sure that thespecifications detaspecifications guid

Try a “normal” or “

The bottom of theprinted page isblank or part of agraphic’s image iscut off.

The page is too complex. (There is notenough memory to process the page.)

Set the resolutionsoftware or printehelp for printer dri

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Scanned imageshave black dots orstreaks in top andbottom margins.

There is ink, glue, white-out, or someother substance on the contact imagesensor.

There is a problem in the contact imagesensor.

See the appropria“Maintenance.”

Replace the conta

Problem Cause Solution

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Scanned text is notclear.

The contrast, resolution, or brightnessneeds to be adjusted before scanning.

The original is on colored paper.

There is a problem in the contact imagesensor.

Adjust the resolutbrightness settingthat appears afterDocument Assista

If the original was including a brownmay not be clear. resolution, contrassettings from the dafter you click Sca

Assistant.

Replace the conta

Scanned imagesprint at a reducedsize.

The JetSuite Pro software reduced theimage.

If necessary, the Jautomatically reduimage to fit it on thyou scan an 8.5- b279.4-mm) page, JetSuite Pro softw

size edge to edgecannot print right paper. To get the

Solving paper feed problems

Use the following table to solve problems related documents through the HP LaserJet 3100 produc

Problem Cause Solution

Pages are comingout curled orwrinkled from theHP LaserJet 3100product.

Paper is curled or wrinkled when using thepaper output bin.

Paper is not stored properly.

Use the front papethe paper path lev

Whenever possibsealed ream at ro

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There is debris in the fixing unit. See the appropria“Maintenance.”

Long pages stopfeeding throughthe document

scanner.

The document feeder tray guides are notset correctly, are broken, or are missing.

The maximum scannable page length is39 inches (991 mm). If the page is longer,scanning stops at 39 inches (991 mm).

Check for broken feeder tray guidesnecessary.

Do not try to pull tyou may damage To remove the parelease door and media.Then, rescan the document scanne

(991 mm) mark, thLong Page? START

moments only. Qucontinue scanningmessage disappescanner stops scathe page has jammIf you are sendingdocument longer tmm), you can alsoconfiguration to “S

th t l

Print is misalignedon the page(skewed pages).

The paper input bin is overfilled.

The paper guides are not set correctly,are broken, or are missing.

The paper’s weight or surface finish doesnot meet HP’s specifications.

Remove some of

Be sure to center guides. Verify thatadjusted too tightlthe paper. Check paper guides and

Make sure that thespecifications detaspecifications guid

Problem Cause Solution

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Scanned itemsare crooked.

The document feeder tray guides are notadjusted properly.

Be sure to center guides. Also, verifadjusted too tightlthe paper. Check document feeder as necessary.

The HP LaserJet3100 product isfeeding multiplesheets or jamsfrequently fromthe paper input binor single-sheetinput slot.

Paper guides are not adjusted properly.

Paper was not removed from the paperinput bin before filling the bin.

The paper input bin is overfilled.

Slide the guides astack in the papersingle sheet in theto center the papeare not adjusted to

Always remove painput bin before re

Remove some of input bin can holdlb (75g/m2) bond w

Problem Cause Solution

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More than one sheet was placed in thesingle-sheet input slot.

The paper was poorly cut by themanufacturer and is sticking together.

The paper does not meet HP’sspecifications for print media.

The output capacity was exceeded in thepaper output bin or front paper output slot.

The pickup roller is dirty.

The pickup roller is damaged.

heavier paper) or

Place only one shsingle-sheet input

“Break” the ream into an upside-doweffectively decrea

turning the paper opposite end first,of paper.

Make sure that thespecifications detaspecifications guid

Do not allow morelb (75g/m2) bond wheavier paper) to Do not allow morefront of the front p

See the appropria“Maintenance.”

Replace the picku

The HP LaserJet3100 product isfeeding multiplesheets or jams

frequently fromthe documentfeeder tray.

The special media lever is in the incorrectposition.

Guides are not adjusted properly.

The special medialeft to send regulaThe lever should bthick documents,

loaded one page a

Remove the docufeeder tray. Straigreinsert it. Slide thsides of the item tthe guides are not

Problem Cause Solution

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The document feeder tray is overfilled.

The item was too thick, too slick, orotherwise did not meet specifications.

The output capacity was exceeded in thedocument output tray.

The document scanner pickup roller orseparation pad is dirty and cannot feedthe document.

The document scanner pickup roller orseparation pad is damaged or worn.

A sensor isn’t operating properly.

There is a problem in the document

scanner path.

Remove some of document feeder pages, dependingpages.

Make sure that thespecifications detaspecifications guid

Do not allow moreup in the docume

See the appropria“Maintenance.”

Replace the roller

Check the sensorsof them are jamme“unjammed,” repla

Check the path fo

any damaged pargears.

Functional checks

Engine test

The engine test is used to verify that the print eng

correctly. The formatter is bypassed during an enengine test is useful for isolating printer problemsprints vertical lines down the entire printable area also useful for checking and adjusting registration

Engine test button location

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The engine test switch is accessible without removlocated on the bottom of the HP LaserJet 3100 pr

.

Internal reports

Use the control panel to print configuration reportsreports. The configuration report shows the settingcontrol panel. The self-test report contains resultsself-test, including modem speed, number of pagerecent error messages.

To print a configuration report

1 Press ENTER /MENU.

2 Use the < and > keys to select Reports and p

3Print Config

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3 Use the < and > keys to selectENTER /MENU.

To run a self-test and print a self-test r

1 Press ENTER /MENU.

2 Use the < and > keys to select Reports and p

3 Use the < and > keys to select Self Test andMENU.

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Half-self test functional check

The electrophotographic process can be subdividestages:

q Image formation stage (charges the drum andimage to the drum with the laser)

q Development stage (forms a toner image on tq Transfer stage (transfers the image to paper)

q Cleaning stage (removes excess toner from t

q Fixing stage (applies heat and pressure to mapaper permanent)

Th f th h lf lf t t h k i t d t

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The purpose of the half-self test check is to determis malfunctioning. Perform the test as follows:

1 Initiate a self test.

2 Open the printer door after the paper advancethe printer (about 8 seconds after the motor bleading edge of the paper should have advan

cartridge.

3 Remove the toner cartridge.

4 Open the toner cartridge drum shield to view a dark and distinct toner image is present on assume that the first two functions of the elecprocess are functioning (image formation andTroubleshoot the failure as a transfer or fixing

If there is no image on the photosensitive drum, pfunctional checks:

1 Make sure you have removed the entire lengthfrom the toner cartridge before you installed t

2 Perform a drum rotation functional check.

3 Perform a high-voltage power supply check

Drum rotation functional check

The photosensitive drum, located in the toner cartfor the print process to work. The photosensitive ddrive from the main drive assembly. To verify thatrotating:

1 Open the printer door.2 Remove the toner cartridge.

3 Mark the drive gear on the cartridge with a felNote the position of the mark.

4 Install the toner cartridge and close the printe

h ld t t th d h t

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sequence should rotate the drum enough to m5 Open the printer and inspect the gear that wa

Verify that the mark moved.

If the mark did not move, inspect the main drive asure that it is meshing with the toner cartridge geaappear functional and the drum does not move, re

cartridge.

Note This test is especially important if refilled toner caused.

Heating element check

1 Paper passes between the heating element aroller to fuse toner to the paper. To verify that tis functioning correctly:

2 Unplug the HP LaserJet 3100 product for at le

3 Verify that the thermistor connector (see Figuboth the printer chassis and J206 of the ECU

4 Remove the heating element connector (see ECU. To measure the continuity of the heatingthe resistance between pins one and two of th

N N l i i 30 h / 10 h

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Note Normal resistance is 30 ohms +/- 10 ohms.

5 If no resistance is measured, replace the hea

6 Remove the thermistor connector (see Figurethe resistance between pins one and two.

Note Normal resistance is 440K ohms +/- 30K ohms at

7 If no resistance is measured, replace the hea

High-voltage power supply check

The high-voltage power supply PCA provides the for the electrophotographic processes.

Checking the toner cartridge connectio

Visually inspect the three connection points on theend of the toner cartridge: charging (callout 1), dru2), and developing roller (callout 3). If they are dirtythe connections, or, if they are damaged, replace cartridge.

Note Use only alcohol to clean the connections

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Note Use only alcohol to clean the connections.

Figure 76. Toner cartridge high-voltage conne

Checking the high-voltage connector a

The assembly uses three spring-loaded pins to cocartridge: charging (callout 1), drum ground (callodeveloping roller (callout 3). Verify that the pins arcorroded and that the spring-loading action is funcare dirty, clean them using alcohol only. If they are

the high voltage connector assembly.

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Figure 77. High-voltage connector assembly

Paper curlPaper curl is inherent to the laser printing process

21

22

23

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Troubleshooting tools

Paper path and components

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Figure 79. Paper path and components

Document path and components

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Figure 80. Document path and components

Repetitive image defect ruler

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Figure 81. Repetitive image defect ruler

Main wiring

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ECU

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Formatter

Service menus

Control panel service menu

Use the control panel menu, under “service,” to seservicing and to recalibrate the document scanne

The service portion of the control panel menu is shierarchical diagram:

Table 13. Control panel service menu

Press ENTER / MENU toth

Use the < and > keysto select “Service”

d E /

Use the < and > keys toselect one of theh i b l d

Usb

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Tests in control panel service mode

Brief explanations of tests in the control panel sershown below:

q Remote test sets up the product to test throu

q Remote setup, followed by Receive setup orfor softswitch settings to be sent or received t

q T.30 protocol trace allows you to set how o

access thecontrol panelmenu.

and press ENTER / MENU.

choices below andpress ENTER /MENU.

bM

ServiceRemote testRemote setup

T.30 protocol traceScan correction

S

Extended service menu

Use the extended service mode to run various sechange softswitch settings, such as the country csetting.

The following page shows the layout of the extend

settings in a hierarchical diagram.

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Self-test in extended service mode

If you perform a self-test from the extended servicreport will also show firmware revision number an

Note Print the internal reports before performing extendtests. The reports contain a record of all settings arestoring the product to its settings.

The table below lists the tests that are performed and the actions to take when tests fail:

Table 15. Extended service mode self-test failures

Test If the test fails, take these actions:

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Configuration test #1 Replace the formatter.

Fax memory test #1

Program test #1 1. Cycle power by unplugging the power cord from waiting 10 seconds, and replugging in the power

2. If the test fails again, clear all memory (see the etree).

3. If the test fails again, replace the formatter.

Configuration test #2Configuration test #3

Configuration test #4

Fax memory test #2

Fax memory test #3

Fax memory test #4

Fax memory test #5

Modem 1 test #1

Modem 1 test #2

Modem 1 test #3

Modem 1 dial tonedetect

1. Make sure that the telephone cable is plugged inon the product and that the telephone line is oper

Other tests in extended service mode

The chart below shows tests that can be performeservice mode and a brief explanation of each test

Table 16. Extended service mode tests

Test Explanation

Keypad test Tests all keypad keys by pressing in sequence.

LCD test Tests the control panel display.

C l l T t th t l l li ht

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Control panel test Tests the control panel lights

Sensor states Shows current detector activation levels. Detector 1 asize detectors. The control panel display shows the pedetector is activated.

All LCD characters Scrolls through the full list of control panel display cha

Scanner plots Tests and recalibrates the document scanner.

Scanner LED After selecting this menu item, lift the document releas

of the LEDs in the contact image sensor are lit.

ADF feed test Runs the document scanner pickup rollers once.

ADF motor test Runs the document scanner motor.

Individual diagnostics Run individual tests from the self-test sequence (see T

Reports in extended service mode

The chart below shows reports that can be printedservice mode and a brief explanation of each repo

Table 17. Extended service mode reports

Report Explanation

T.30 protocol trace Prints a report of the G3 protocol transmissions and re

SRAM dump Prints SRAM address values in an address range you

S l t Prints the calibration page

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Scanner plots Prints the calibration page.

Log debug report Prints detailed fax and memory address information. F job number, start time used, fax ID, transmission typemode, and status.

Task stacks Prints address locations of various tasks.

Translations Prints text strings used in the display, beginning with tThese text strings are printed in the language currentYou can compare the numbers in this report to the nureport to translate non-English messages on the displ

Printer fonts Prints all characters of fonts available in memory.

Firmware version(under “memory/ softswitch”)

Shows firmware revision information on the control pa

Whit f Di l i i d i hit f

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Softswitches

Any time the formatter board is replaced or otherwthe product, or when softswitches are reset to defcode softswitch must be reset.

Extended service mode allows you to change softproduct. A softswitch is a set of one to eight bits (a1's and 0's), as needed. See the software techniccomplete list of softswitches.

To change the country code softs

1 Enter Backspace#** to access the extended s

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2 Press < or > until Memory/Softswitches appeon the control panel.

3 Press the Enter/Menu.

4 If Softswitches does not appear below Memor

the control panel, press < or > until it appears

5 Press Enter/Menu.

6 Use the keypad to enter 101 (the “country cod

7 Press Enter/Menu.

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Firmware download

Newer versions of the firmware for the HP LaserJebe downloaded to the product.

To perform a firmware download1 Restart the computer in MS-DOS mode (do n

window).

2 Press down and hold Stop/Clear while perform

3 Cycle power by unplugging the power cord fro

source, and then replugging in the power cord4 Type the following, substituting the current ve

fi f

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firmware for XXX:Copy /b leonXXX.rom lpt1:

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7 Parts and diagra

Chapter contentsHow to use the parts lists and diagrams . . . . . . .

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How to use the parts lists and diagrams . . . . . . .

Consumables and accessories . . . . . . . . . . . . . .

Common hardware . . . . . . . . . . . . . . . . . . . . . . . .

Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . .

Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . .

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Common hardware

Table 20. Common fasteners

Example Description

Screw, machine, truss head

Screw, star

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Screw, self-tapping

Screw, hex-head

Screw, hex-head, star

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Table 21. Supports

Reference Part number Description

1 RB2-3362-000CN Paper input support

2 RB2-3410-000CN Paper output support

3 RB2-3455-000CN Document feeder support

4 RB2-3470-000CN Document output support

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Table 22. External covers and panels

Reference Part number Description

1 C3948-40010 I/O bezel

2 RB2-3341-000CN Right cover

3 RB2-3360-000CN Left cover

4 RB2-3361-000CN Rear cover

6 RB2-3349-000CN Front casing

7 RB2-3450-000CN Top cover

8 RB2-3451-000CN Left front cover

9 RG5-3488-000CN Input bin assembly

10 RG5-4763-000CN Single-sheet input slot assem

11 RB2-3452-000CN Pressure release lever cover

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12 RB2-3453-000CN Paper path lever

14 XA9-0476-000CN Screw, TP, M3X8

16 XA9-0724-000CN Screw, M3X8 (2)502 XA9-0497-000CN Screw, M4X6 (4)

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Table 23. Printer door (1 of 2)

Reference Part number Description

RG5-4220-000CN Printer door assembly

RG5-4221-000CN Upper guide assembly

RG5-4223-000CN Document scanner assembly

RG5-4241-000CN Control panel assembly

1 HB1-2867-000CN Strap

5 RB2-3436-000CN Document scanner guide

10 HB1-2895-000CN Cover, arm

11 RB2-3430-000CN Document scanner separation

13 RB2-3351-000CN Cable tube

15 RB2-3454-000CN Spacer

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17 RB2-3468-000CN Left hinge cover

18 RB2-3469-000CN Right hinge cover

19 RB2-3409-000CN Cable guide30 RB2-4114-000CN Sheet, pad

501 XB4-7300-807CN Screw, tapping, truss head, M

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Table 24. Printer door (2 of 2)

Reference Part number Description

RG5-4220-000CN Printer door assembly

1 RB2-3365-000CN Sheet, arching (2)

4 RB2-3401-000CN Duct, 1

5 RB2-3402-000CN Duct, 2

24 XA9-0614-000CN Screw, M3X8 (4)

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Table 25. Document scanner assembly

Reference Part number Description

RG5-4223-000CN Document scanner assembly

1 RG5-4688-000CN Pickup roller assembly, docum

11 RG5-4239-000CN Contact image sensor assem

14 FA9-1449-000CN Screw

15 RG5-4233-000CN Cable, contact image sensor

17 RG5-4238-000CN Cable, CIS grounding

19 RH7-1376-000CN Motor, AC 1.08W

503 XB4-7300-807CN Screw, M3X8

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RG5-3484-070CN

RG5-3474-020CNRG5-3486-000CN

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Table 26. Internal components (1 of 3)

Reference Part number Description

RG5-3484-070CN Paper pickup assembly

RG5-3486-000CN Pickup roller assembly

RG5-3474-020CN Delivery assembly

1 RB2-3345-000CN Cap

2 RB1-7247-000CN Paper guide

3 RB2-3350-000CN Cable guide, formatter

4 RF5-2664-000CN Reinforcement plate

5 RB2-3364-000CN Metal plate

6 RB1-7130-020CN Cable guide

7 RB1-7234-000CN Cap

8 RB2 3366 000CN C bl id h ld f tt

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8 RB2-3366-000CN Cable guide holder, formatter

9 XA9-0724-000CN Screw M3X8 (11)

10 XA9-0855-000CN Screw, RS, with washer, M3X

11 RB1-7176-000CN Guide sheet

12 RB2-4118-000CN Grounding plate

13 RB2-3467-000CN Grounding plate (2)

14 WT2-0317-000CN Cable guide, control panel

15 WT2-5498-000CN Cable guide, frame16 RB2-3409-000CN Cable mount

17 RB2-3465-000CN Left hinge holder

18 RB2-3466-000CN Right hinge holder

19 XA9-0434-000CN Screw, TP, M3X4 (4)

20 RG5-4237-000CN Cable, grounding, document s

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Table 27. Internal components (2 of 3)Reference Part number Description

1 RY7-5005-000CN Gear kit #1

2 RB1-7288-020CN Bushing (2)

3 RB1-7105-000CN Pressure release lever

4 RB2-1632-000CN Gear support plate

5 RB1-7107-000CN Gear holder

6 RY7-5007-000CN Fuser release kit

7 RH7-1320-000CN Motor, DC 12V

8 RY7-5036-000CN Gear kit #2

16 RG5-3453-000CN Switch lever assembly

17 RF5-2367-000CN Exit roller

19 RG5 3494 050CN Laser/scanner assembly

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19 RG5-3494-050CN Laser/scanner assembly

20 RB1-7385-020CN Grounding spring

21 XA9-0267-000CN Screw, TP, M3X6 (2)

22 XA9-0382-000CN Screw, TP, M3X12

23 WE8-5192-000CN Ferrite ring core

24 RB9-0227-000CN Spacer

25 XA9-0267-000CN Screw, TP, M3X6 (2)

501 XB6-7300-807CN Screw, TP, M3X8 (5)502 XB4-7300-809CN Screw, tapping, truss head, M

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Table 28. Internal components (3 of 3)Reference Part number Description

RG5-3475-020CN Separation guide assembly

1 RB1-7223-000CN Grounding clip

2 RB1-7246-000CN Bushing (2)

3 RB1-7341-030CN Right cartridge guide #1

4 RF5-2362-000CN Pressure roller

5 RF5-1517-020CN Pressure plate

6 RF5-2358-000CN Transfer guide

7 RF5-1534-000CN Transfer roller

8 RB1-7129-000CN Grounding metal

9 RF5-1515-020CN Right cartridge guide #2

10 RF5-1514-020CN Left cartridge guide

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10 RF5 1514 020CN Left cartridge guide

11 RS5-0796-000CN Pressure roller gear (27T)

12 RB1-7256-000CN Right side plate

13 RB1-7255-000CN Left side plate

14 RF5-1533-000CN Pressure roller ground guide

15 VS1-5057-002CN Fuser connector (2P)

16 RG5-4678-000CN Fixing assembly, 110 V

16 RG5-4681-000CN Fixing assembly, 220 V19 RS5-2508-000CN Spring, compression

20 XA9-0824-000CN Screw, RS, M3X10

21 XA9-0686-000CN Screw, M3X6

22 XA9-0724-000CN Screw, M3X8

23 RG5-3452-000CN Transfer guide assembly

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Table 29. Electrical components assemblyReference Part number Description

1 RB2-3346-000CN Speaker mount

2 RB2-3342-000CN Bottom plate

3 RB2-3347-000CN Spacer, PCB (7)

4 RF5-2663-000CN Foot (4)

5 RG5-2035-000CN Cable, laser

6 RH2-5346-000CN Cable, formatter

7 RH6-3845-000CN Speaker

8 RG5-2029-000CN Cable, paper pickup

9 RG5-3662-000CN Cable, door switch

10 RG5-2032-000CN Cable, thermistor

11 RG5-2033-000CN Cable, motor

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12 RG5-3661-000CN Cable, scanner

13 WT2-0276-000CN Clamp, wire

14 WT2-0367-000CN Clamp, cable

15 WT2-5178-000CN Clamp, cable

16 XA9-0828-000CN Screw, with star washer, M3X

17 XA9-0890-000CN Screw, with washer, M3X6 (4

18 RG5-4690-000CN ECU, 110 V18 RG5-4691-000CN ECU, 220 V

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Table 30. Paper pickup assemblyReference Part number Description

RG5-3484-000CN Paper pickup assembly

RG5-3485-030CN Feed assembly

RG5-3486-040CN Pickup roller assembly

1 RB1-7172-000CN Spring, grounding

2 RB1-7181-000CN Separation arm assembly

3 RB1-7182-000CN Input sensor assembly

5 RB1-7184-000CN Bushing

6 RB1-7197-020CN Clutch

7 RB1-7199-000CN Spring, grounding

9 RG5-1947-000CN Paper feed drive assembly

13 RH7-5139-000CN Solenoid

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14 RS5-2501-000CN Spring, compression

16 RB1-7185-000CN Arm, plate, left

17 RB1-7186-000CN Arm, plate, right

18 RF5-2372-000CN Plate, middle

20 RB1-7177-000CN Frame, paper feed

501 XB4-7401-000CN Screw, tapping, pan head, M4

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Table 31. Feeder assembly

Reference Part number Description

RG5-3485-030CN Feed assembly

1 RB2-1699-000CN Feed roller

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Table 32. Separation guide assembly

Reference Part number Description

RG5-3475-020CN Separation guide assembly

2 RG5-3476-000CN Face-up/face-down lever

4 RB2-1690-000CN Fuser roller bushing

5 RB1-7293-000CN Lever, sensor

6 RB1-7294-000CN Spring, torsion

7 RF5-2368-000CN Fuser exit roller assembly

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Table 33. Delivery assembly

Reference Part number Description

RG5-3474-020CN Delivery assembly

1 RB1-7284-020CN Delivery roller #1 (4)

2 RB2-1685-000CN Delivery roller #2 (2)

3 RB1-7286-000CN Delivery spring #1 (4)4 RB1-7287-000CN Delivery spring #2 (2)

6 RG5-3479-000CN Spur assembly outside (2)

7 RG5-3478-000CN Spur assembly inside (2)

8 RB1-7334-000CN Jammed paper protector

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Alphabetical parts list

Table 34. Alphabetical parts list

Part name Part number Figu

Arm, plate, left RB1-7185-000CN 94

Arm, plate, right RB1-7186-000CN 94

Bottom plate RB2-3342-000CN 93

Bushing RB1-7184-000CN 94

Bushing (2) RB1-7246-000CN 92

Bushing (2) RB1-7288-020CN 91

Cable guide RB1-7130-020CN 90

Cable guide RB2-3409-000CN 87

Cable guide holder, formatter RB2-3366-000CN 90

C C

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Cable guide, control panel WT2-0317-000CN 90

Cable guide, formatter RB2-3350-000CN 90

Cable guide, frame WT2-5498-000CN 90

Cable tube RB2-3351-000CN 87

Cable, CIS grounding RG5-4238-000CN 89

Cable, contact image sensor (J1004 toJ903)

RG5-4233-000CN 89

Cable, door switch RG5-3662-000CN 93

Cable, formatter RH2-5346-000CN 93

Cable, grounding, document scanner motor RG5-4237-000CN 90

Cable, laser RG5-2035-000CN 93

Cable, motor RG5-2033-000CN 93

Cable paper pickup RG5 2029 000CN 93

Clutch RB1-7197-020CN 94

Contact image sensor assembly RG5-4239-000CN 89

Control panel assembly RG5-4241-000CN 87

Cover, arm HB1-2895-000CN 87Delivery assembly RG5-3474-020CN 90

Delivery assembly RG5-3474-020CN 97

Delivery roller #1 (4) RB1-7284-020CN 97

Delivery roller #2 (2) RB2-1685-000CN 97

Delivery spring #1 (4) RB1-7286-000CN 97

Delivery spring #2 (2) RB1-7287-000CN 97

Document feeder support RB2-3455-000CN 85

Document output support RB2 3470 000CN 85

Table 34. Alphabetical parts list

Part name Part number Figu

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Document output support RB2-3470-000CN 85

Document scanner assembly RG5-4223-000CN 87

Document scanner assembly RG5-4223-000CN 89

Document scanner guide RB2-3436-000CN 87

Document scanner separation pad RB2-3430-000CN 87

Duct, 1 RB2-3401-000CN 88

Duct, 2 RB2-3402-000CN 88

ECU, 110 V RG5-4690-000CN 93

ECU, 220 V RG5-4691-000CN 93

Exit roller RF5-2367-000CN 91

Face-up/face-down lever RG5-3476-000CN 96

Feed assembly RG5-3485-030CN 94

Front casing RB2-3349-000CN 86

Fuser connector (2P) VS1-5057-002CN 92

Fuser exit roller assembly RF5-2368-000CN 96

Fuser release kit RY7-5007-000CN 91Fuser roller bushing RB2-1690-000CN 96

Gear holder RB1-7107-000CN 91

Gear kit #1 RY7-5005-000CN 91

Gear kit #2 RY7-5036-000CN 91

Gear support plate RB2-1632-000CN 91

Grounding clip RB1-7223-000CN 92

Grounding metal RB1-7129-000CN 92

Grounding plate RB2-4118-000CN 90

Table 34. Alphabetical parts list

Part name Part number Figu

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Grounding plate RB2-4118-000CN 90

Grounding plate (2) RB2-3467-000CN 90

Grounding spring RB1-7385-020CN 91

Guide sheet RB1-7176-000CN 90

I/O bezel C3948-40010 86

Input bin assembly RG5-3488-000CN 86

Input sensor assembly RB1-7182-000CN 94

Jammed paper protector RB1-7334-000CN 97

Laser/scanner assembly RG5-3494-050CN 91

Left cartridge guide RF5-1514-020CN 92

Left cover RB2-3360-000CN 86

Left front cover RB2-3451-000CN 86

Motor, DC 12V RH7-1320-000CN 91

Paper feed drive assembly RG5-1947-000CN 94

Paper guide RB1-7247-000CN 90

Paper input support RB2-3362-000CN 85Paper output support RB2-3410-000CN 85

Paper path lever RB2-3453-000CN 86

Paper pickup assembly RG5-3484-000CN 94

Paper pickup assembly RG5-3484-070CN 90

Pickup roller assembly RG5-3486-000CN 90

Pickup roller assembly RG5-3486-040CN 94

Pickup roller assembly, document scanner RG5-4688-000CN 89

Plate middle RF5-2372-000CN 94

Table 34. Alphabetical parts list

Part name Part number Figu

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Plate, middle RF5 2372 000CN 94

Pressure plate RF5-1517-020CN 92

Pressure release lever RB1-7105-000CN 91

Pressure release lever cover RB2-3452-000CN 86

Pressure roller RF5-2362-000CN 92

Pressure roller gear (27T) RS5-0796-000CN 92

Pressure roller grease CK-8006-000CN 92

Pressure roller ground guide RF5-1533-000CN 92

Printer door assembly RG5-4220-000CN 87

Printer door assembly RG5-4220-000CN 88

Rear cover RB2-3361-000CN 86

Reinforcement plate RF5-2664-000CN 90

Screw M3X8 (11) XA9-0724-000CN 90

Screw, M3X6 (9) 0515-2672 90

Screw, M3X6 XA9-0686-000CN 92

Screw, M3X8 XA9-0724-000CN 92Screw, M3X8 XB4-7300-807CN 89

Screw, M3X8 (2) XA9-0724-000CN 86

Screw, M3X8 (4) XA9-0614-000CN 88

Screw, M4X8 (4) XA9-0497-000CN 86

Screw, RS, M3X10 XA9-0824-000CN 92

Screw, RS, with washer, M3X8 XA9-0855-000CN 90

Screw, tapping, pan head, M4X10 (2) XB4-7401-000CN 94

Screw, tapping, truss head, M3X8 XB4-7300-809CN 91

Table 34. Alphabetical parts list

Part name Part number Figu

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Sc e , tapp g, t uss ead, 3 8 300 809C 9

Screw, tapping, truss head, M3X8 (7) XB4-7300-807CN 87

Screw, tapping, truss head, M4X8 (3) XB4-7400-807CN 90

Screw, TP, M3X12 XA9-0382-000CN 91

Screw, TP, M3X4 (4) XA9-0434-000CN 90

Screw, TP, M3X6 (2) XA9-0267-000CN 91

Screw, TP, M3X6 (2) XA9-0267-000CN 91

Screw, TP, M3X8 XA9-0476-000CN 86

Screw, TP, M3X8 (5) XB6-7300-807CN 91

Screw, truss head, with washer (4) FA9-1449-000CN 90

Screw, with star washer, M3X4 XA9-0828-000CN 93

Screw, with washer, M3X6 (4) XA9-0890-000CN 93

Spacer RB9-0227-000CN 91

Spacer, PCB (7) RB2-3347-000CN 93

Speaker RH6-3845-000CN 93

Speaker mount RB2-3346-000CN 93Spring, compression RS5-2501-000CN 94

Spring, compression RS5-2508-000CN 92

Spring, grounding RB1-7172-000CN 94

Spring, grounding RB1-7199-000CN 94

Spring, tension RB1-7294-000CN 96

Spur assembly inside (2) RG5-3478-000CN 97

Spur assembly outside (2) RG5-3479-000CN 97

Strap HB1-2867-000CN 87

Table 34. Alphabetical parts list

Part name Part number Figu

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p

Switch lever assembly RG5-3453-000CN 91

Top cover RB2-3450-000CN 86

Transfer guide RF5-2358-000CN 92

Transfer guide assembly RG5-3452-000CN 92

Transfer roller RF5-1534-000CN 92

Upper guide assembly RG5-4221-000CN 87

Numerical parts list

Table 35. Numerical parts list

Part number Part name Figu

0515-2672 Screw, M3X6 (9) 90

C3948-00002 RFI shield 90

C3948-40010 I/O bezel 86

C3948-67903 LIU board (U.S.) 90

C3948-67904 LIU board (worldwide) 90

C3949-67901 Formatter 90

CK-8006-000CN Pressure roller grease 92

FA9-1449-000CN Screw 89

FA9-1449-000CN Screw, truss head, with washer (4) 90

HB1-2867-000CN Strap 87

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p

HB1-2895-000CN Cover, arm 87

RB1-7105-000CN Pressure release lever 91

RB1-7107-000CN Gear holder 91

RB1-7129-000CN Grounding metal 92

RB1-7130-020CN Cable guide 90

RB1-7172-000CN Spring, grounding 94RB1-7176-000CN Guide sheet 90

RB1-7177-000CN Frame, paper feed 94

RB1-7181-000CN Separation arm assembly 94

RB1-7182-000CN Input sensor assembly 94

RB1-7184-000CN Bushing 94

RB1-7255-000CN Left side plate 92

RB1-7256-000CN Right side plate 92

RB1-7284-020CN Delivery roller #1 (4) 97

RB1-7286-000CN Delivery spring #1 (4) 97RB1-7287-000CN Delivery spring #2 (2) 97

RB1-7288-020CN Bushing (2) 91

RB1-7293-000CN Lever, sensor 96

RB1-7294-000CN Spring, torsion 96

RB1-7334-000CN Jammed paper protector 97

RB1-7341-030CN Right cartridge guide #1 92

RB1-7385-020CN Grounding spring 91

RB2-1632-000CN Gear support plate 91

Table 35. Numerical parts list

Part number Part name Figu

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RB2-1685-000CN Delivery roller #2 (2) 97

RB2-1690-000CN Fuser roller bushing 96

RB2-1699-000CN Feed roller 95

RB2-3341-000CN Right cover 86

RB2-3342-000CN Bottom plate 93

RB2-3345-000CN Cap 90

RB2-3346-000CN Speaker mount 93

RB2-3347-000CN Spacer, PCB (7) 93

RB2-3349-000CN Front casing 86

RB2-3350-000CN Cable guide, formatter 90

RB2-3351-000CN Cable tube 87

RB2-3409-000CN Cable guide 87

RB2-3410-000CN Paper output support 85

RB2-3430-000CN Document scanner separation pad 87

RB2-3436-000CN Document scanner guide 87RB2-3450-000CN Top cover 86

RB2-3451-000CN Left front cover 86

RB2-3452-000CN Pressure release lever cover 86

RB2-3453-000CN Paper path lever 86

RB2-3454-000CN Spacer 87

RB2-3455-000CN Document feeder support 85

RB2-3465-000CN Left hinge holder 90

RB2-3466-000CN Right hinge holder 90

Table 35. Numerical parts list

Part number Part name Figu

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RB2-3467-000CN Grounding plate (2) 90

RB2-3468-000CN Left hinge cover 87

RB2-3469-000CN Right hinge cover 87

RB2-3470-000CN Document output support 85

RB2-4114-000CN Sheet, pad 87

RB2-4118-000CN Grounding plate 90

RB9-0227-000CN Spacer 91

RF5-1514-020CN Left cartridge guide 92

RF5-1515-020CN Right cartridge guide #2 92

RF5-1517-020CN Pressure plate 92

RF5-1533-000CN Pressure roller ground guide 92

RG5-1947-000CN Paper feed drive assembly 94

RG5-2029-000CN Cable, paper pickup 93

RG5-2032-000CN Cable, thermistor 93

RG5-2033-000CN Cable, motor 93RG5-2035-000CN Cable, laser 93

RG5-3452-000CN Transfer guide assembly 92

RG5-3453-000CN Switch lever assembly 91

RG5-3474-020CN Delivery assembly 90

RG5-3474-020CN Delivery assembly 97

RG5-3475-020CN Separation guide assembly 92

RG5-3475-020CN Separation guide assembly 96

RG5-3476-000CN Face-up/face-down lever 96

Table 35. Numerical parts list

Part number Part name Figu

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RG5-3478-000CN Spur assembly inside (2) 97

RG5-3479-000CN Spur assembly outside (2) 97

RG5-3484-000CN Paper pickup assembly 94

RG5-3484-070CN Paper pickup assembly 90

RG5-3485-030CN Feed assembly 94

RG5-3485-030CN Feed assembly 95

RG5-3486-000CN Pickup roller assembly 90

RG5-3486-040CN Pickup roller assembly 94

RG5-3488-000CN Input bin assembly 86

RG5-3494-050CN Laser/scanner assembly 91

RG5-3661-000CN Cable, scanner 93

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XA9-0434-000CN Screw, TP, M3X4 (4) 90

XA9-0476-000CN Screw, TP, M3X8 86

XA9-0497-000CN Screw, M4X8 (4) 86

XA9-0614-000CN Screw, M3X8 (4) 88XA9-0686-000CN Screw, M3X6 92

XA9-0724-000CN Screw M3X8 (11) 90

XA9-0724-000CN Screw, M3X8 92

XA9-0724-000CN Screw, M3X8 (2) 86

XA9-0824-000CN Screw, RS, M3X10 92

XA9-0828-000CN Screw, with star washer, M3X4 93

XA9-0855-000CN Screw, RS, with washer, M3X8 90

XA9-0890-000CN Screw, with washer, M3X6 (4) 93

Table 35. Numerical parts list

Part number Part name Figu

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XB4-7300-807CN Screw, M3X8 89

XB4-7300-807CN Screw, tapping, truss head, M3X8 (7) 87

XB4-7300-809CN Screw, tapping, truss head, M3X8 91

XB4-7400-807CN Screw, tapping, truss head, M4X8 (3) 90

XB4-7401-000CN Screw, tapping, pan head, M4X10 (2) 94

XB6-7300-807CN Screw, TP, M3X8 (5) 91

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IndexAAC power distribution 70

accessories and consumablesavailability 32life expectancies 54list 195ordering 195part numbers 54replacement schedule 54

acoustical emissions 17

adjusting registration 168amperage 17assemblies

cable guide 140contact image sensor 102delivery 112, 222document release door 98

separation guseparation pad

solenoid 124speaker 144transfer roller

132upper guide 1

assemblies, docupart numbers

assembly diagram

authorized deale

Bbattery failure 46bidirectional

ECP interfaceparallel cable,

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document scanner 104

document scanner motor 104document scanner pickup roller 106document scanner, illustration 206electrical 215exit roller 111face-up/face-down lever 120feed 137feed, illustration 218

feed, part numbers and descriptions219feet 146front casing 116fuser exit roller 121fuser pressure plate 114fusing 77heating element 117

high-voltage connector 175kick plate 133

p ,bins

input 21, 82input capacitymedia requiremedia weight output 21output capacitpaper input 7

bits per second (

blackdots on pagesdots on scannpages 161streaks on pag

blacklist 40blank

areas on page

bottom of pag162

cables

parallel 22, 195phone 22power 22

Canadian requirements 28, 30capacity

circuit 17document feeder tray 37media input bin 37

output 37paper output bin 37cartridge sensor (SW101) 80cartridges, toner. See 

toner cartridgescentral processing unit (CPU) 72characters partially printed 161charging the drum 75checking registration 168

checksdrum rotation 172half-self test 171high-voltage power supply 174

circuitcapacity 17diagram 180driver 81

reports 169

settings 51configuration tesconformity, declaconnection pointsconnectors

ECU-to-formaparallel cable phone line 22

power cable 2conserving toner consumables and

availability 32life expectanclist 195ordering 195part numbers

replacement sconsumer protecconsumption

energy 30paper 31toner 31

contact image secontact image se

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driver 81

circuitryhigh-voltage 71power 70

cleaningequipment 55glass surface 55image sensor 55page 61photosensitive drum process 76print path 58rollers 56, 59, 60toner cartridge connection points 174toner from clothing 59transfer charging roller 83

codecountry 189

communication error 42, 48compatibility, fax 15

contact image se

contrastdefault 52key on contro

control paneldescription 73illustration 19messages 40

control panel sercontrol panel testcontrol, paper mocopy

key on controreduction and settings 52size default 5speed 15, 16

cordsparallel 22

crooked pages 165

curledpages 164paper 175

Customer Information Center 195customer support

ordering parts 194Support Materials Europe (SME) 194Support Materials Organization (SMO)

194cycle, dutyprinter 15scanner 15

Ddark

faxes 157, 159

scanned images 157date/time

incorrect 46invalid 44setting 52toner cartridge expiration 156

DC power distribution 70d l 195

feeder tray inp

input bin 82  jammed 41output slot 19output suppooutput tray capickup roller 8release door release door a

too long 45document feederillustration 19input media remedia input re

document pathcomponents 1

document scanne

assembly/motpickup roller adocument scanne

illustration 20part numbers

document scannedocument scannedocument sensor

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dealers 195

declaration of conformity 29decoding error 43defaults

restoring 52settings 51

defect ruler for images 179defects on page 160delivery assembly 112, 222

delivery rollerillustration 78motion 176

density default, print 52depth of unit 16detect, distinctive ring 15developing process 75diagrams

assembly 194timing 84

document sensor

documentsfall out of feedlost 43

door open sensodoor release latcdoors

document releprinter 20, 95

dotson pages 158on scanned im

dots per inch (dp(dots per inc

download, firmwadpi (dots per inchdraft mode 73DRAM (dynamic r

73

dynamic random-access memory (DRAM)

73

EECP interface 73ECU (engine controller unit)

description 68loads 68

edge of document sensor (PS802) 80

edge of paper, not printing to 157electrical components

illustration 214part numbers and descriptions 215

electrophotographic process 171electrostatic discharge (ESD). See ESD

(electrostatic discharge)element, heating

estimated life 54when cleaning 55

emissions, acoustical 17encoding error 43energy consumption 30ENERGY STAR program 30engine control function 67engine controller unit (ECU) See ECU

extended service

extended serviceextended serviceextended warran

Fface-down outputface-up output paface-up/face-dow

face-up/face-dowfaded print 158failure, battery 4faint printing 54fasteners, commofax

coding schemcompatibility

memory errorredial failure 4resolution 16settings 52transmission ltransmission s

fax logon menu tree

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engine controller unit (ECU). See ECU

(engine controller unit)engine test 168engine test switch (SW201) 69, 80enlargement, copy 15envelopes, input capacity 37environmental

product stewardship program 30requirements 36

equipment, cleaning 55errorscommunication 42, 48configuration 43decoding 43encoding 43fax memory 44light on control panel 39

memory full 45messages on control panel 40

on menu tree

unable to printfax memory test faxes

light or dark 1lost 43

FCC regulations features, productfeed assembly 1

illustration 21part numbers feed assembly drfeed functions 67feeder support, dfeeder tray, docu

capacity 37input media re

media input refeeding problems

front paper output slot capacity 37

functional checksdrum rotation 172fuser

exit roller assembly 121gear motion 176pressure plate assembly 114roller motion 176

fuses 70

fusingassembly 77element 76

Gglass, cleaning 55graphic, bottom cut off 161guide assembly

cable 140separation 220

guides, document feeder tray 19guides, paper 21

Hhalf-self test 171

images

lines on page print at reducetoo light or da

individual diagnoIndustry Canada

28initial rotation perinput

bins 21fax number limmedia requiremedia weight single-sheet ssupport 20

input bins 37installation requir

installing self-tapinterruptions in pISO 9296 specific

J  jammed documeJBIG fax coding sjob status 52

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halftone resolution 16hardware

common 196maintenance 32

heating elementassembly 117estimated life 54when cleaning 55

height of unit 16

high-voltageconnector assembly 175power distribution 71power supply check 174

HP authorized dealers 195HP Customer Information Center 195HP FIRST fax service 32HP SupportPack 32

HP website 31

  job status 52

Kkeypad test 44, kick plate

assembly 133motion 77, 1spring 133

Llabel, product 18language settinglaser safety statelaser/scanner asslast rotation periolatches, printer dLCD characters tLCD test 186

lines

on scanned images 159phone 22LIU (line interface unit)

board assembly 107log debug report 187log, fax

on menu tree, fax 52unable to print 46

lostdocuments 43fax transmission 44

Mmagnetic field emissions 23main motor assembly 141manual dial key on control panel 39

marginsfor printed pages 15for scanned items 15

masked ROM (read-only memory) 72material safety data sheet (MSDS) 33maximum media size 37measurements of unit 16media

modem

error 45speed 15modem dial tone modem modulatimodem test 185modem tone test monitoring papermotion control 69

motordescription 69document scarotation 176

motor, main 141MR fax coding scMSDS (material smultiple pages fe

Nno answer 40, 4no dial tone 45numbers

model and serpart 54product 195

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media

requirements 37special lever 19megahertz rating 72memory

boot ROM (read-only memory) 72DRAM (dynamic random-access

memory) 73fax error 44

flash ROM (read-only memory) 72full 45, 47masked ROM (read-only memory) 72not enough 46RAM (random-access memory) 73ROM (read-only memory) 72specifications 15

menu tree

control panel service 182extended service 184

product 195

Ringer Equiva

Ooperating environoptical system 8ordering

accessories aparts 194

outputbin 21bin capacity 3document supfront paper 20slot, documensupport 19, 2tray capacity

overcurrent 70

pages

blank print 162bottom cut off 161completely black 161crooked 165curled or wrinkled 164long stop feeding 164multiple feeding 166, 167per minute 15, 16

skewed 162, 165panel, control 19, 20paper

consumption 31curl 175feed problems 164guides 21

  jammed 41

motion 77not being picked up 176not moving through path 176not printing to edge 157output bin capacity 37recycling 32size default 52

paper exit sensor (PS201) 77, 79, 80

scanner 19, 3

scanner, cleapath, documentcomponents 1

path, papercheck 176cleaning 58components 1

pause key on con

paused printing 4performancespecifications toner cartridge

phone line connephone. See  telepphonebook reporphoto resolution

photosensitive drcharging 75cleaning procrecycling 31troubleshootin

photosensors. Se

phototransistor apickup roller asse

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paper exit sensor flag assembly 122paper feed frame assembly 129paper input bin 78

media requirements 37media weight requirements 37

paper jams 166, 167paper motion control 69paper out sensor (PS202) 77, 79, 80paper path

check 176components 177lever 20

paper pickup assembly 216paper registration sensor (PS203) 77, 79,

80parallel cable

connector 22

ordering 195

estimated life motion 176

pickup rollersdocument scaestimated life illustration 78

pickup/feed functplates

fuser pressurekick 77, 133,metal side ass

pliers required fopolling error 47power

AC distributioncable connectconsumption

DC distributio

primary charging 75

printdensity default 52misaligned 165path 58resolution 16skewed 165speed 15, 16

print engine control system 69

printerdoor 20door assembly 95door release latches 20duty cycle 15feed system 77functions 67isolating problems 168

laser/scanner assembly 123laser/scanner functions 67path 20, 21, 78pickup roller assembly 54separation pad 54sequence of operation 83

printer doorillustrations 202, 204

b d d i i 203

R

RAM (random-acrandom-access mread-only memorrecycling 31

parts 32printer 32

redialfailure 49

key on controreduced scannedreduction

copy 15registration checkregulations

Canadian 28,FCC 25

laser safety 2transportationrelease door 19REN (Ringer Equrepetitive

image defect rmarks on pag

reports

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part numbers and descriptions 203,205

printer fonts report 187printing

configuration report 51engine test page 168faded 158faint 54menu tree 51misaligned 162paused 47timeout 47to edge of paper 157won’t print 157

problems. See errors; troubleshootingproduct

block diagram 67

description 14

configuration extended servfax log 52internal 169log debug 18menu settingsphonebook 52printer fonts 1self-test 52SRAM dump T.30 protocol task stacks 1translations 1transmission

requirementsCanadian 28,environmentamedia 37

scan 16

standard 16superfine 16RFI shield assembly 94ring detect

distinctive 15Ringer Equivalence Number (REN) 28rod lens array 81rollers

cleaning 56, 59, 60delivery 78document delivery 82document feed 82document pickup 82document scanner pickup 106exit 77, 111feed assembly drive 77

fuser exit 121motion 176pickup 78, 126pressure 54, 78, 119printer pickup, estimated life 54scanner pickup 54transfer 54, 78, 132transfer guide 132

ROM (read onl memor ) 72

schemes, fax cod

screwdrivers requscrewscommon 196installing 86self-tapping 8

seconds per pageself-tapping screwself-test

procedure 16report 52, 16sensor states tessensors

contact imagedocument 80document leaddocument pre

door open 80edge of documimage 55location and fupaper exit 80paper exit (PSpaper out (PSpaper registratoner cartridge

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ROM (read-only memory) 72rotation period

initial 83last 83

rotation, drum 172ruler, repetitive image defect 179

S

safety statement, laser 23, 24scanprocess 75, 171resolution 16

scanned imageslines on page 159print at reduced size 163too light or dark 157

scanned text unclear 163scanner

toner cartridgeseparating proceseparation guide separation pad aseparation pads

description 77estimated life scanner 54

serial number 18

service and suppHP Customer ordering partsSupport MaterSupport Mater

194settings

lost due to bat

menu 51

slots

document output 19medial requirements 37output capacity 37single-sheet input 21, 78

SME (Support Materials Europe) 194smears on page 159SMO (Support Materials Organization)

194

smudges on page 158softswitches 189solenoid 80solenoid assembly 124, 176sound

control panel volume key 39emissions 17power level 17pressure level 17volume setting 52

spare parts 32speaker 144special media lever 19specifications, product 23specks from toner on paper 62speed

copy 15 16

support and serv

HP Customer ordering partsSupport Mater

194Support MaterialsSupport Materials

194SupportPack 32

supportsdocument feedocument outillustration 19input 20output 20part numbers

switchesengine test (Slocation and fupower shutoff

system error 50

TT.30 protocol tractask stacks repor

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copy 15, 16dial key on control panel 39dialing 15fax transmission 15modem 15print 15, 16

speed-dialkey on control panel 39

springs, kick plate 133, 134

SRAM dump report 187stains on page 158standard resolution 16standby period 83statement, laser safety 23, 24stewardship program 30storage

requirements 36

toner cartridge 38

telephoneconsumer protemperature requtest

engine switchkeypad 44page for engin

tests

all LCD characonfiguration control panel document scadocument scaengine 168extended servfax memory 1

half-self 171individual diag

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*C3948-90957**C3948-90957*

C3948-90957

Copyright© 1998Hewlett-Packard Co.Printed in USA 3/98

Manual Part No.C3948-90957

Printed on at least50% Total Recycled Fiber withat least 10% Post-Consumer Paper