np1550

SERVICE BULLETIN COPIER

NP6216MODEL:

Major quality issues

Field quality problems

Quality upgrade/production efficiency

Miscellaneous

SUBJECT:

Issued by Canon Europa N.V.

DIFFERENCES BETWEEN THE NP1550 AND NP6216

OutlineAccompanying the marketing of the NP6216, notification is made here of differences between the NP6216and the NP1550.This content will be incorporated into the next revision of the NP1550 Service Manual (FY8-13BN-010),Service Hand Book (FY8-2380-010) and Parts Catalog (FY8-31AS-010).

Details1) The major differences between the NP1550 and NP6216 are listed below.

• Accessory changeThe Stapler Sorter has been changed from the Stapler Sorter-B1 to the Stapler Sorter-D2. Otheraccessories are unchanged.

• Modification to shape and color of external cover

• Change in Control Card V attachment positionThe attachment position has been changed from the right side of the control panel to the left side.Connect the 4P connector cable to the extension cable and the 4P connector on the copier control panel.

• Change in copy speed (see the table below)

• The auto shut off mode is available.

• Serial number change

NP6216 (230V UK) : F13-4451 QBE 00001 and laterNP6216 (230V Europe) : F13-4491 UCC 00001 and later

- 1/7 -

Reduction ratio Paper size Cassette

A3

A4

A4R

—

A4R

A3

—

Copies/min.

9

16

12

—

10

10

—

A3 (297 × 420 mm)

A4 (210 × 297 mm)

A4R (297 × 210 mm)

50%

A3 → A4

A4 → A3

200%

Direct

ReductionI

II

EnlargementI

II

No.: 1550-006 Rev. 1(D6-12E-035-1)

DATE: 13.06.97

- 2/7 -

1550-006 Rev. 1

2) Differences in Parts Catalog

[Changed parts]

Fig./Key no.

100-13

100-13A

100-18

100-13D

325-

325-1

325-11

325-9A

325-9

325-11A

101-4

101-12

130-

130-17

130-10

130-9

130-8

130-3

130-11

130-12

130-13

130-16

130-2

102-37

810-

810-33

103-22

1-3-22B

103-

190-

190-1

100-7

100-6

100-19

640-4

640-5

101-18

Part no. (OCI part no. is in parenthesis)Q’ty

NP1550 NP6216Part name

FG2-4181-00P

FC1-3552-00P

FA0-0186-00P

FC1-3550-00P

FG0-2987-01P

FF2-5619-00P

FF2-6702-00P

FC1-3553-00P

FF2-6700-00P

FC1-3554-00P

FC1-0928-00P

FH0-0068-00P

FG2-2970-02P

FC1-5384-00P

FC1-1009-00P

FC1-1008-01P

FC1-1007-00P

FC1-5373-00P

FC1-5375-00P

FC1-5381-00P

FC1-5378-01P

FC1-5383-00P

FC1-5374-00P

WT2-0434-000

FG1-7396-380

FG1-7397-390

FA5-1958-000

FF2-7417-00P

FC1-5369-00P

FG0-1111-00P

FG2-3024-01P

FC1-0893-01P

FC1-0751-00P

FF0-0066-01P

FA0-0157-00P

FA5-1764-000

FA5-1765-000

FC1-0983-00P

FG0-1216-00P (992990J)

FA0-0658-00P (992959W)

FA0-0671-00P (992961Q)

FA0-0678-00P (992986A)

FG0-1213-00P (992885D)

FF0-0199-00P (992886E)

FF0-0198-00P (992887F)

FA0-0654-00P (992892C)

FF0-0197-00P (992894E)

FA0-0679-00P (992922H)

FA0-0648-00P (992984E)

FH7-6268-00P (992991F)

FG0-1215-00P (992979S)

FA0-0680-00P (992966M)

FA0-0660-00P (992967N)

FA0-0661-00P (992968X)

FA0-0662-00P (992969Y)

FA0-0664-00P (992970V)

FA0-0665-00P (992971J)

FA0-0666-00P (992972K)

FA0-0667-00P (992974M)

FA0-0668-00P (992975N)

FA0-0669-00P (992976P)

WT2-5300-000 (363855E)

FG0-1214-00P (992880L)

FG0-1223-00P (992881H)

FA0-0651-00P (992896G)

FG0-1208-00P (992898J)

FA0-0650-00P (992897H)

FG0-1207-00P (992900Y)

FG0-1225-00P (992884C)

FF2-0202-00P (992883B)

FA0-0657-00P (992888Q)

FA0-0656-00P (992889R)

FA0-0652-00P (992895F)

FS4-2186-000 (362460M)

FC1-7200-00P (362462B)

FA0-0873-00P (992980Q)

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

4

1

1

1

1

1

1

1

1

1

1

1

1

1

1

DOOR, FRONT

LABEL, JAM BY-PASS

BLOCK, DOOR LOCK

LABEL, INSTRUCTION

MULTI FEED ASSEMBLY

HANDLE

COVER

LABEL

GUIDE, PAPER

LABEL, PAPER SUPPLY

MOUNT, MAIN SWITCH

SWITCH, ROCKER

CONTROL PANEL ASSEMBLY

FRAME, RESISTOR

SUPPORT, CONTROL PANEL, LEFT

SUPPORT, CONTROL PANEL, CENTER

SUPPORT, CONTROL PANEL, RIGHT

COVER, CONTROL CARD

KEY TOP, NUMERIC

FRAME, KEY TOP

KEY TOP, PRINT/RESET

KNOB, SLIDE

LABEL, OPERATION KEY

CLIP

FIXING ASSEMBLY 220V

FIXING ASSEMBLY 240V

HANDLE

LEVER, RELEASE

LEVER, FEEDER ASSEMBLY RELEASE

KNOB, FIXING ASSEMBLY

EXHAUST FAN ASSEMBLY

DUCT

TRAY, MANUAL FEED

TRAY, MANUAL FEED

TRAY, COPY

SPRING, TORSION

ROD, STIRRING 2

PLATE, MAGNET CATCH

1550-006 Rev. 1

- 3/7 -

Fig./Key no.

350-

350-1

350-4

350-5

350-6

350-7

350-17

930-


NP1550 NP6216Part name

FG2-2978-01P

FA5-1891-000

FA5-1894-000

FA5-1895-000

FA5-1896-000

FC1-0705-00P

FA5-1908-000

FG2-3008-01P

FG0-1070-00P(362190F)

FA0-0244-00P(362191U)

FA0-0245-00P(362192V)

FA0-0247-00P(362194X)

FA0-0246-00P(362193W)

FA0-0251-00P(362198B)

FA0-0252-00P(362199C)

FG0-1226-00P(992760A)

1

3

1

3

3

1

1

1

FEEDER ASSEMBLY

BELT FEEDER

SHAFT

PULLEY, DRIVE

PULLEY

SEAL, DUCT

GUIDE, PAPER FEED

DC CONTROLLER PCB ASSEMBLY

Added pages

Fig./Key no.

350-8

350-11

350-14

350-24

350-501

350-502

350-503

350-504

350-505

350-506

350-507

350-508

930-Q318

930-Q303


NP6216Part name

FA0-0250-00P(362197S)

FA0-0249-00P(362196Z)

FA0-0248-00P(362195Y)

FA0-0277-00P(362371P)

XB1-2300-409

XB1-2400-609

XD3-2200-122

XD2-1100-642

XD1-4200-402

XD2-1100-502

XD3-2200-182

XD1-1108-225

FG0-1229-00P(992768E)

FG2-9015-00P(994661V)

1

1

1

1

2

9

1

5

1

2

1

2

1

1

SUPPORT, PAPER TRANSPORTATION

GUIDE, AIR

GUIDE, PAPER

CUSHION

SCREW, MACH., TRUSS HEAD, M3x4

SCREW, MACH., TRUSS HEAD, M4x6

PIN, DOWEL

RING, E

WASHER, TOOTHED LOCK

RING, E

PIN, DOWEL

SHIM

ROM

CPU

Added parts

Fig./Key no.

350-3

350-8

350-11

350-14

350-15

350-23

350-27

350-26

350-28

350-30


NP1550Part name

FA5-1893-000

FA5-1898-000

FC1-1025-00P

FA5-1905-000

FA5-1906-010

FH7-1529-000

FA5-2160-000

FA5-1909-000

WT2-0030-000

XA9-0134-000

1

1

1

16

3

1

1

1

1

6

PLATE, ROLLER HOLD

PLATE, MOUNT, FEED ASSEMBLY

DUCT

HOLDER, PULLEY

COUPLING

FAN, DC24V

CUSHION

GUIDE, PAPER FEED, FRONT

TIE, CABLE

NUT, PUSH

Deleted parts

- 4/7 -

Page NP1550 NP6216

3-24 G. Developing Assembly/Drum Cleaner1. Outlines

•••••

When the amount of toner in the hopper issufficient, the sensor output is “1”. When it isbelow the specified level, the output is “0”.The DC controller checks for 5 seconds aftercopying is completed if the TONER EMPTYsignal (TEP) is being outputted. If the signal isoutputted continuously for 5 seconds, it is regardedas “TONER OUT -First time”. If another TONEREMPTY signal is received in the same way afterthe next copying operation is completed, it isregarded as “TONER OUT -Second time” and theDC controller makes the ADD TONER indicatorflash. The CT unit for this copier does not have aremaining toner sensor or waste toner sensor.

1550-006 Rev. 1

<NP1550 Service Manual (FY8-13BN-010) modified contents>

G. Developing Assembly/Drum Cleaner1. Outlines

•••••

When the amount of toner in the hopper issufficient, the sensor output is “1”. When it isbelow the specified level, the output is “0”.The DC controller checks for 40 seconds duringcopying if the TONER EMPTY signal (TEP) isbeing outputted. If the signal is outputtedcontinuously for 40 seconds, it is regarded as“TONER OUT” and the DC controller makes theADD TONER indicator flash.The CT unit for this copier does not have aremaining toner sensor or waste toner sensor.

Added pages

- 5/7 -

1550-006 Rev. 1

5-5

Step Work

Turn the door switch ON using the door••••

Make a copy after the COPY START keyhas gone green.Wait for ten seconds or more after the drumhas stopped, and make another copy.

Check that counter operaters properly.

Remarks

Added pages

••••

Check the following:

• No abnormal sound is heard.• The ADD TONER indicator flashes about

five to ten seconds after the second copyoperation is over.

Check that the reading has increased by twofrom the reading recorded in step 7.

C. Checking the Operation

1••••

8

9

Turn the door switch ON using the door••••

After making any copies of the following.The COPY START key goes red.1 making 7 continuous copies on A32 making 9 continuous copies on A43 making 5 single copies on A34 making 5 single copies on A4

Check that counter operaters properly.

••••

Check the following:• No abnormal sound is heard.• The ADD TONER indicator starts to flash

when the Copy key on the control panelturns red at the end of copying for any offollowing.

1 making 7 continuous copies on A32 making 9 continuous copies on A43 making 5 single copies on A34 making 5 single copies on A4

Check that the reading has increased by thenumber of copies made from the readingrecorded in step 8.

C. Checking the Operation

1••••

8

9

Page NP1550

NP6216

Step Work Remarks

Remarks

- 6/7 -

1550-006 Rev. 1

3-41

Added pages

VI. SERVICE MODE

<NP1550 Service Manual (FY8-13BN-010) added contents>

A. Outline••••

B. Using the Service Mode••••

<Mode No.C18>Press the AE key twice, and check ‘CEE’ is indicated on the control panel; then, press theSORT/GROUP key.

<Mode No.C21>Change the setting using the NUMERIC keypad, and press the SORT/GROUP key.

8) Press the service switch (SW300) to leave the service mode.

3-43aMode No. Display

C21Auto shut offmodesetting

Selects/Deselects the auto shut off mode: 0,OFF; 1, ON(The copier’s fixing unit and keyboard unless theENERGY SAVER key will turn OFF if the copieris left alone for 30 minutes.)

Default Settings

0

0 or 1

Page NP6216

- 7/7 -

1550-006 Rev. 1

4-15

Cause/Problemarea Procedure Action

Added pages

27. Indicator does not GO OFF when there is toner during black copying

1

2

3

Does the indicator come back ONwhen the power switch is set OFF,then ON again?

Turn the power OFF, and disconnectedJ39. Turn the power ON, and press theCOPY START key; 5 sec or moreafterthe main motor has stopped, press theCOPY START key once again. Doesthe indicator go ON when the mainmotor is at rest?

Does the stirring rod inside the blackdeveloping assembly operatenormally?

YES

YES

NO

YES

Replace the DCcontroller PCB.


Check the stirring rodand gear.

Replace the black tonerlevel sensor(TS1).

Check Result

Does the indicator come back ONwhen the power switch is set OFF, thenON again?

Turn the power OFF, and disconnectedJ39. Turn the power ON, and press theCOPY START key to make any copiesof the following:1 making 7 continuous copies on A32 making 9 continuous copies on A43 making 5 single copies on A34 making 5 single copies on A4Press the COPY START key onceagain.Does the indicator go red when anycopies of above has been made?

Does the stirring rod inside the blackdeveloping assembly operatenormally?



Check the stirring rodand gear.

Replace the black tonerlevel sensor(TS1).

<NP1550 Service Hand Book(FY8-2380-010) modified contents>

Page NP1550

NP6216

DC controllerPCB

DC controllerPCB

Stirring rodgear

Black tonerlevel sensor

27. Indicator does not GO OFF when there is toner during black copying

Cause/Problemarea Procedure ActionCheck Result

1

2

3

DC controllerPCB

DC controllerPCB

Stirring rodgear

Black tonerlevel sensor

YES

YES

NO

YES

SERVICE BULLETIN COPIER

NP6216(MANUFACTURED BY OCI)

MODEL:

Major quality issues

Field quality problems

Quality upgrade/production efficiency

Miscellaneous

LOCATION:SUBJECT:


COPY-BOARD COVER

STIFFING AND GRIPPING OF COPY-BOARD COVERHINGES

OutlineThis bulletin details the measures for preventing stiffing and gripping of hinges of the Copy-Board Covercaused by the modified profile of the rotation cam located in the hinges of Copy-Board Cover.

Details[Phenomena]After few hundreds of open/close cycles of the Copy-Board Cover, the hinges might become stiff andeventually grip.

[Cause]The interference between the rotation cam and the hinge of the Copy-Board Cover was increased to allowthe unit maintaining an open angle of 45o.Such higher interference may however cause hinges to become stiff and eventually grip after few hundredsof open/close cycles.

Factory Measure[Temporary Measure]The rotation cams located in the hinges are being lubricated with Grease Permalub G-2 (CK-0551-000) inthe Factory. Several thousands of machines are being retrofitted from the warehouse by lubricating withGrease Permalub G-2 (CK-0551-000) the rotation cam located in the hinges of Copy-Board Cover.Although avoiding the stiffing and gripping of the hinges, this will however maintain the ability for the unitto keep an open angle of 45

o.

[Permanent Measure]The Permanent Measure is yet to be defined at the time of issuing of this bulletin.

Field MeasureThe rotation cams located in the hinges of Copy-Board Cover shall be lubricated with Grease Permalub G-2(CK-0551-000).

[Operations]1) Remove the copy board cover (blanket), and hold it onto a table.2) Bend the hinges of the unit.3) Lubricate the profile and the guides of the rotation cams located in the hinges using Grease Permalub G-2

as described in Fig. 1.4) Remount the Copy Board Cover on the machine.

- 1/2 -

CanonNo.: 1550-007

(D6-12E-038)DATE: 21.11.97

- 2/2 -

1550-007

Apply Grease Permalub G-2 in the Gap

Note: Apply Grease Permalub G-2 (CK-0551-000) on along the full width and the inner surface of the gap on the rotationcams.

Caution : When applying the grease, take care not to paste it on outer surfaces, neither of the hinges, nor of the cams.

Fig. 1 Lubricating The rotation Cams

SERVICE BULLETIN COPIERIssued by Canon Europa N.V.

MODEL: NP6216, NP1550 No.: 1550-008 Rev. 1

VERY IMPORTANT Date: 09.07.99

SUBJECT: DEFECTIVE OPTIONAL POWER SUPPLY FH3-2388

PROBLEM

The Sorter or Stapler Sorter is not working.

CAUSE

The optional power supply FH3-2388-000 is defective.

The Optional Power Supply may break down under the following conditions:1. When the copier main switch is turned on with the sorter cable connector DETACHED!

(This condition could happen when the sorter is detached for troubleshooting.)2. When the sorter cable connector is pulled out of the machine when the copier is on.

Condition 1 is “normal” and belongs to the properties of the PCB design. Normally, only an error codewill be displayed.Condition 2 is not normal and a countermeasure will be made to prevent this.

FACTORY MEASURE

At the output of the power supply a resistance is added to prevent an open-circuit.

FIELD MEASURE

Add the resistance unit FM6-2275 to the power supply.

Connect the connector of the resistance unit FM6-2275 to the connector J3 on the power supply PCBFH3-2388.Tighten the metal sheet, on which the resistance is mounted, with the PCB mounting plate FA6-8611.See the figures 1 and 2.

Note:When the resistance is not added to the power supply, it must be prevented that the copier is switchedon with the sorter cable detached.

SERVICE PART

NO. DESCRIPTION PART NO Q'TY IC P.C.

1 O YY ---

N RESISTANCE UNIT FM6-2275 0 – 1

COPIER - 2 - 1550-008 Rev. 1

Tighten the countermeasure part with the PCBmounting plate with a screw here.

Fig. 1: The power supply unit with countermeasure part installed

Countermeasure part

Sorter power supply

Pass the connectorthrough the opening andconnect to the J3 on thepower supply PCB

COPIER - 3 - 1550-008 Rev. 1

Fig. 2: Connect the connector of the countermeasure part to the connector J3.

Tighten the countermeasure partwith the cover sheet metal.


MODEL: NP6216 No.: 1550-009(D6-OCI-002-00)

Date: 10.08.99

LOCATION: EXHAUST FAN ASSEMBLY

SUBJECT: PREVENTING GENERATION OF NOISE

OUTLINE

This bulletin has the purpose of informing the Field about the measures for preventing the occurrenceof noise from the Exhaust Fan Assembly. This bulletin also describes the proper sequence ofoperations and precautions to observe for by upgrading the unit’s configuration of installed machines.

DETAILS

The Exhaust (ozone) Fan Assembly may occasionally generate noise.The accidental, partial detaching of the Adhesive Sponge Ring from the Front Fan Support Platecauses the noise.

[Phenomenon]In the original configuration, the movement of the springs suspending the fan wheel at the front islimited by the fact that a portion of them is stuck to the Adhesive Sponge Ring. This, in turn, is stuckto the Front Fan Support Plate. See Figure 1 for details.

Fig. 1 – Original Configuration (Front Fan Support Plate with Adhesive Sponge RingFA0-0698-00P)

This solution was introduced in April 1998 for reducing the noise generated by the unit through limitingthe movement of the suspension springs.However, it was recently understood that this might not be completely reliable.

COPIER - 2 - 1550-009

[Cause]Analyses conducted in the Factory on defect samples returned from the Field and other units sampledfrom the warehouses led to identify two different reasons for the reported defect.1. If the surfaces of either the Front Fan Support Plate or the Springs are not properly treated

(cleaned and conditioned) before the Adhesive Sponge Ring is stuck to them, the sponge will soondetach and hence become partially loose.In the case, this will typically show up relatively early (few thousands copies) in the life of the unit.

2. Because of the resonance of the system (fan wheel, shaft, motor), the continuous movement of thesprings can progressively wear the sponge, up the point when springs may finally detach from theAdhesive Sponge Ring.This problem was observed on two units returned from the Field.

If realised, both conditions will generate the same result.The Adhesive Sponge Ring will detach from either the Springs or the Front Fan Support Plate henceloosing its limiting effects against the excessive movement of the system.

FACTORY MEASURE

As a countermeasure action against the occurrence of either of the phenomena described, theAdhesive Sponge Ring has been replaced with a Rubber Damper.In this new configuration, the damper is placed around the bush. The damper works by means offriction against the surface of the fan duct at one side and the bush at the other hence primarily limitingthe movement of the bush, not that of the springs. See Figure 2 for details.

Fig. 2 – New Configuration (Front Fan Support Plate with Rubber Damper FA0-0635-00P)

The benefits resulting from the use of a Rubber Damper in place of the Adhesive Sponge Ring can besummarised as follows.

1. The damper does not need being glued for producing its effects, but works simply because held inplace pressed between the duct and the bush.

2. The damper does not touch the springs, hence avoiding the risk of wearing in time.

This measure has been successfully implemented on the two units returned from the Field, as well ason several other units retrofitted from the warehouses.The new configuration has then been implemented in the Factory.

COPIER - 3 - 1550-009

FIELD MEASURE

Replace Adhesive Sponge Ring FA0-0698-00P with Rubber Damper FA0-0635-00P.

[Operations]1) Power OFF the machine.2) Disconnect the power cord from the main body.

A) Accessing the Exhaust Fan Assembly1) Open the front door and detach the drum unit.2) Detach the rear cover.3) Disconnect the connector (J311) and remove the two screws from the DC Controller PCB. Then,

shift the DC Controller PCB.4) Remove the two screws from the rear of the Exhaust Fan Assembly.

Fig. 3 – Accessing the Exhaust Fan Assembly (SM 4-10)

5) Detach the ozone filter and inside cover. Then, lower the feeder assembly.6) Hold the Exhaust Fan Assembly on its bottom, and remove the two screws. Then, pull the

assembly to the front.

Fig. 4 – Removing the Exhaust Fan Assembly (SM 4-11)

7) Hold the assembly onto a table.

B) Replacing the Adhesive Sponge Ring with Rubber Damper1) Remove the screw and remove the front support plate from the Exhaust Fan Assembly.2) Detach and remove the Adhesive Sponge Ring FA0-0698-00P from the bush and springs.

Note:Residues and marks of adhesive from the sponge eventually left on the surface of the front support plate will notaffect the performance and functionality of the Rubber Damper.

COPIER - 4 - 1550-009

3) Install the Rubber Damper FA0-0635-00P in the position previously held by the sponge.

Note:The Rubber Damper must be placed onto the bush.

Fig. 5 – Installing the Rubber Damper FA0-0635-00P

C) Remounting the Machine1) Remount the front support plate to the Exhaust Fan Assembly.2) Hold the Exhaust Fan Assembly on its bottom and slide the assembly to the rear, inside the

machine. Then, remount the two screws.3) Raise the feeder assembly. Then, remount the inside cover and ozone filter.4) Remount the two screws at the rear of the Exhaust Fan.5) Reposition DC Controller PCB in place. Then remount the two screws to the DC Controller PCB

and reconnect the connector (J311).6) Remount the rear cover.7) Remount the drum unit and close the front door.8) Reconnect the power cord to the main body.9) Power ON the machine.

Machine is now ready to work.

SERVICE PARTS

N° Old Descri ption Part Numbers Quantit y Interchan ge- P.C.New ability

Ø ×Old ADHESIVE SPONGE RING FA0-0698-00P 1 Ö 0 190-No Yes1

New RUBBER DAMPER FA0-0635-00P 0 Ö 1 Ø × -

Ø ×Old EXHAUST FAN ASSEMBLY FG2-9016-00P 1 Ö 0 190No Yes2

New EXHAUST FAN ASSEMBLY FG2-9016-05P 0 Ö 1 Ø × -

COPIER - 5 - 1550-009

AFFECTED MACHINES

Destination NP6216

Canon Deutschland GmbH UCW87000Canon Europa N.V. UCW90917

Canon France SA UCW94370Canon Italia SpA UCW87570Canon (UK) Ltd. QBE16340


MODEL: NP6216 No.: 1550-010(XR2316-003-00)

Date: 10.08.99

LOCATION: FEEDER ASSEMBLY – CORONA ASSEMBLY RAIL PLATE

SUBJECT: IMPROVING POSITIONING AND LOCKING OF TRANSFERCORONA ASSEMBLY AGAINST COPY QUALITY DEFECTS

OUTLINE

This bulletin has the purpose of instructing the Field on the proper sequence of operations andprecautions to observe for assuring the correct functionality of the Transfer Corona Assembly.

DETAILS

During tests periodically performed on the outgoing production, one machine performing feedabilitytests in N/L condition showed a high jam rate when copying in duplex mode on recycled paper, anddeformed image when copying on SM1 paper.The phenomenon is due to the discharger not working properly, because of the Transfer CoronaAssembly being not correctly positioned in place, hence making the electrical contact uncertain.

[Phenomenon]In a problem machine, few release / close cycles of the feeder assembly are enough to at leastdisplace the Transfer Corona Assembly and even to free it almost completely. In such a condition theTransfer Corona Assembly tends sliding few millimetres frontward. Once the feeder assembly isreleased down, the Transfer Corona Assembly can often be removed right away, without any need forpushing its handle down first.Moreover, copy quality problems could also be observed, such as “light-to-white” copies, or deformedimage in limit condition and with special papers, depending on the degree of displacement of theTransfer Corona Assembly.Other effects, such as some electrical micro-discharging phenomena in the contact’s area – althoughnever confirmed through observation – cannot however be discarded.

[Cause]Further analyses determined that the displacement of the Transfer Corona Assembly was caused bythe front Leaf Spring of the feeder assembly being out of shape, therefore unable to keeping theTransfer Corona Assembly correctly in place when the feeder assembly was released down.Such a condition can therefore happen when installing the drum unit, or whenever having to remove ajammed sheet.Since both the front and the rear Leaf Springs have the same design, the rear one as well could bedefective.While the height and shape of both the front and rear Leaf Springs is not so determinant for theelectrical grounding contact (that is guaranteed anyway), the correct height and shape of the front LeafSpring is instead essential to the correct positioning and locking of the Transfer Corona Assembly.

COPIER - 2 - 1550-010

FACTORY MEASURE

[Temporary Measure]After determining the cause of the defect, all parts along the line and in stock have been reworked tomatch with the design requirements.

[Final Measure]The Supplier corrected the production process and improved the process controls.

FIELD MEASURE

Taking into consideration that replacing the Leaf Spring in the Field would be quite difficult, wedesigned a Countermeasure Spacer that is easy to mount without the need for using any special tool.The spacer can be used for reverting to the original and correct condition the functionality of the frontLeaf Spring where this is necessary (see Fig. 1 for details).

Fig. 1 – Countermeasure Spacer

The Countermeasure Spacer should be used on installation or otherwise at the first service scheduledon machines showing the problem.Whenever any of the conditions described in the [Phenomenon] section above occur, first check thecondition of the machine and in particular the gap between the top edge of the Leaf Spring and thebottom face of the upper guide of the Corona Assembly Rail Plate above it. If necessary ANDappropriate, then install the Countermeasure Spacer.

[Time Required]Approximately 3 minutes are required for completing the full cycle on one machine.

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[Operations]

1) Power OFF the machine.2) Disconnect the power cord from the power outlet.3) Open the front door.

A) Checking the Condition of the Machine1) Release the handle of the feeder assembly, then lock the unit back in place for few times (two or

three).

Note:When releasing the feeder assembly, DO NOT use extreme care in accompanying the unit whilst it goes down,but try simulating a more typical User’s behaviour, instead.

2) Check the position and freedom of the Transfer Corona Assembly FG2-3020 (Fig. 560 in PartsCatalogue).

Note:If you are unsure of the result, reposition the Transfer Corona Assembly and repeat step 1) above, or alternativelytry some copies to see the effects how they will appear to the User.

3) Remove the Transfer Corona Assembly.4) Check the shape of the front Leaf Spring FA5-1907 (key N° 16 in Fig. 350 of P.C.), and the gap

between the top edge of the Leaf Spring and the bottom face of the upper guide of the CoronaAssembly Rail Plate above it.

Note:In a “good” machine, the gap between the top edge of the Leaf Spring and the bottom face of the upperguide of the Corona Assembly Rail Plate above it should be 3 mm (typical).

• If necessary (displacement of Transfer Corona Assembly, copy quality defects) AND appropriate(the gap between the top edge of the Leaf Spring and the bottom face of the upper guide of theCorona Assembly Rail Plate (key N° 2 in Fig. 350 of P.C.) above it is greater than 3 mm), theninstall the Countermeasure Spacer as detailed further in Section B.

Caution:It might happen that – although the Transfer Corona Assembly became displaced after performing step 1above – the gap between the top edge of the front Leaf Spring and the bottom face of the upper guide of theCorona Assembly Rail Plate above it is less than 3 mm. If this condition occurs, it was quite probablydetermined because of subjecting the feeder assembly to some mechanical solicitation beyond reasonablelimits when performing step 1.In this case, try repeating step 1 above taking care for applying a more realistic mechanical solicitation to thefeeder assembly. This time, the Transfer Corona Assembly should not become displaced again.

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B) Installing the Countermeasure Spacer

Caution:DO NOT install the Countermeasure Spacer on a machine where the gap between the top edge of the LeafSpring and the bottom face of the upper guide of the Corona Assembly Rail Plate above it is less than 3 mm.

Installing the Countermeasure Spacer (having a thickness of ~ 1.5 mm) on a machine were the gap between thetop edge of the Leaf Spring and the bottom face of the upper guide of the Corona Assembly Rail Plate above it isless than 3 mm may not work. Doing so will result into an extra interference condition between the Leaf Springand the guide of the Corona Assembly Rail Plate.

Such an interference condition may either prevent snapping the spacer in place (hence forcing not to install itproperly), or – on the other hand – may prevent sliding the Transfer Corona Assembly inside the machine.

1) Remove the drum unit.

Caution:Shade the photoconductor with some sheets of light-barrier material.

Note:If you could exercise yourself to use your left hand, this would certainly make the job much easier.

2) Slide the Countermeasure Spacer onto the Corona Assembly Rail Plate (key N° 2 in Fig. 350 ofP.C.) while keeping it oriented along the front-rear axis of the machine, and with its hook placeddownward at your right (toward the by-pass area).

Fig. 2 – Installing the Countermeasure Spacer (Step 2)

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3) Then, begin rotating the Countermeasure Spacer 90° clockwise while pushing it rearward havingcare of fitting both its ends correctly beneath the two terminals of the Leaf Spring.

Caution:DO NOT continue until BOTH ends of the Countermeasure Spacer are placed correctly beneath the terminals ofthe Leaf Spring.

If either end is laying above the corresponding terminal of the Leaf Spring, then remove the CountermeasureSpacer at this point and repeat steps 2 and 3 above before continuing.

Fig. 3 - Installing the Countermeasure Spacer (Step 3)

4) Finally, push the Countermeasure Spacer completely rearward until looking its central hook insidethe slot located in the centre area of the Corona Assembly Rail Plate.

Fig. 4 - Installing the Countermeasure Spacer (Step 4)

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Caution:Take care of pushing the hook of the Countermeasure Spacer WELL INSIDE the slot located in the centre area ofthe Corona Assembly Rail Plate, pressing it onto the Cushion FA5-2160 (key N° 27 in Fig. 350 of P.C.), that iscropping through the slot.

You may wish using a slot head screwdriver for pushing the Countermeasure Spacer correctly in place.

See Fig. 5 for a detail of the final and correct positioning of the Countermeasure Spacer.

Fig. 5 - Installing the Countermeasure Spacer (Caution)

C) Remounting the Machine1) Remount the drum unit.2) Remount the Transfer Corona Assembly.3) Raise and lock the feeder assembly.4) Close the front door.5) Reconnect the power cord to the power outlet.6) Power ON the machine.

Machine is now ready to work.

SERVICE TOOLS

Description Part Number Remarks

Slot head screwdriver FY9-1009-000 175 mm

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AFFECTED MACHINES

Potentially Affected Serial NumbersModel NP6216

Destination From To

Canon Deutschland GmbH UCW35031 UCW50130Canon Europa N.V. UCW37231 UCW52190

Canon France SA UCW36331 UCW48130Canon Italia SpA UCW39261 UCW51130Canon (UK) Ltd. QBE11891 QBE13390

Note:All reworked machines can be identified by the Gray-Beige Dot stuck on the shipping label of the packing box.

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Service Bulletin


Model : NP1550/6216 (Made by OCI) No.: 1550-011

(FF-T01-D6-000002-01)

DATE: 10.12.99

Location : TRANSFER CORONA ASSEMBLY

Subject : CHANGE TO TRANSFER CORONA ASSEMBLY

Reason : To communicate that the transfer corona assembly has been changed due to supply circumstances.

Details : The transfer corona assembly will be changed to a part which is being used in other machines, due tosupply circumstances.The shape and color of the grip assembly will change accordingly, but there will be no changes inquality.

Service Parts :

No. Description Part number Q’tyInter-

change-ability

P.C. -- -- -- -- -- -- -- -- --

1 Old TRANSFER CORONA ASSEMBLY FG2-3020-040 1→0 560-

New TRANSFER CORONA ASSEMBLY FG3-0370-00P 0→1

COPIER

No Yes

The color of the shadedarea will change fromgray to sky blue.

Change in Shape

Documents

np1550