Top 10 Solutions

TOP 10 SOLUTIONSFebruary 2013

Copyright 2012, Konica Minolta Business Solutions U.S.A., Inc.

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SSD SUPPORT SOLUTIONS

1015

Solution ID 88 Solution UsageTAUS0601120EN*

DescriptionF54.SolutionPROBABLE CAUSES:1. A fan irregularity signal, excessive current draw due to binding. Examine M4 for obstructions which may bind the fan. Check the M4 fan lock signal (mainCB, CN26-4) in the 47 mode, input code 42. The voltage should be between 0.1 to 0.2V DC. If 5V DC is present, either the fan is binding or the fan isdefective. Replace M4 (p/n 25HA80512).Note: If the fan lock signal is normal, install the version 17.0 EPROM (p/n 101517-17.0) to prevent false F54 errors as outlined in 1015/1212 TechnicalBulletin #15 .

2. IC7 on the main CB has shorted due to a failed total counter. IC7 shares the 24V DC control signal line with the exposure lamp, separation solenoid(SD1), registration solenoid (SD2), total counter, key counter, and cooling fan (M4). All loads except the total counter operate in diagnostics.Replace the total counter (p/n 466088201) and the main CB (p/n 25HE-7312).

3. A poor connection between the cooling fan (M4) and the main CB. Reseat CN73 at M4 (cooling fan) and CN26 on the main CB.


DescriptionToner specks or spots on copies. Drum surface may look cloudy or have a film on it.SolutionPROBABLE CAUSES:1. Possible toner contamination. Toner from the following lots '850725Z4A', '850725Z4B', and '850725Z4C' has been identified to cause this problem in hightemperature and high humidity environments. Replace the toner and developer. If the drum cannot be cleaned using isopropyl alcohol, the drum and bladewill also have to be changed. The failed drum can be returned using standard warranty program procedures. Refer to 1015/1212 Technical Bulletin #22 forinformation on toner filming.

2. T/S corona arcing can damage the drum, crow-feet shaped marks may occur on the OPC surface. Repair or replace the T/S corona (p/n 25HA-4511) andreplace the drum (PCUA 947124). Samples may be requested for this type of failure.

3. If a key counter is installed, a failed key receptacle may short the main CB causing HV(B) to stay ON continuously. This may result in drum surfacebreakdown and corona unit failure. Replace the key counter receptacle (p/n U120-1040), the main CB (p/n 25HE-7313) and the T/S corona (p/n 25HA-4511)as needed.

4. Excessive developer spillage inside machine. Effected serial number range is below 26EE10176. Refer to 1015/1212 Technical Bulletin #21 .


DescriptionHow to install a key counter.SolutionThe key counter is mounted in a separate box attached to the rear cover of the machine. For detailed installation instruction, see 1015 Technical Bulletin #3 .


DescriptionP81 after replacing the main CB.SolutionCAUSE: Control boards for the 1015 have been changed to make the installation of a key counter easier as outlined in 1015 Technical Bulletin #17 . Thejumper JP1 has been eliminated; relay wiring (p/n 26AA90270) must be on all machines that do not have a key counter installed. If the new style board isinstalled without the relay wiring, a P81 will be displayed. The new style main CB (p/n 25HE-7313) was installed on machines beginning with s/n 25HE11181.

SOLUTION: Install the relay wiring (p/n 26AA90270) if the main CB is not outfitted for a key counter.

Details of key counter installation per 1015 Technical Bulletin #3.


DescriptionP27 at power up.SolutionPROBABLE CAUSES:1. Older version firmware is installed on the main CB.Install EPROM p/n 101517-16.0 for the machine to correctly display F26 when the following cases occur:

2. Toner was added prior to adding developer and performing the TDS adjustment. Developer must be added FIRST at new machine set-up so that tonerdoes not fall on the uncovered TDS sensor.

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Copyright 2012, Konica Minolta Business Solutions U.S.A., Inc. February 2013

1015

Run 47 mode, output code 51 until the code does not reoccur (may take 5 to 10 attempts) OR open the developer unit and clean the excess toner from thearea of the TDS sensor. Then tilt the developer unit to allow fresh developer into this area.

3. Poor connection at CN95. The toner density sensor (TDS) is abnormal (0.2 V DC or lower). Reconnect CN95 (located under the front of the developerunit).

4. TDS failure. If version 16.0 is installed, P27 is displayed when the TDS is disconnected or fails. Check for proper connection prior to replacing the TDS.

See EPROM history hyperlink.


DescriptionF26 at power up or following the TDS adjustment (L-detect).SolutionPROBABLE CAUSES: 1. Developer is overtoned or undertoned. Depleting the amount of toner in the developer (sky shots) or adding toner to the developer (47 mode, output code01) resolves the problem.

2. Toner was added before performing the L-detect adjustment at new machine setup. See 1015/1212 Technical Bulletin #5A .

Developer must be added FIRST at new machine set-up so that toner does not fall on the uncovered TDS sensor.

3. A loose pin to CN95 on the developer unit. This connector is for the TDS sensor. Reseat all pins (4) to CN95 on the developer unit.

4. Incorrect TDS reading. Perform memory reset then run the TDS adjustment (47 mode, output code 51) until the code disappears (may take 5-6 attempts).

5. Component failure. Check the TDS sensor, M5 (toner supply motor).

6. Loose pins on the NOVRAM, IC28. Reform the NOVRAM pins and reinstall the IC on the main CB.


DescriptionF28.SolutionPROBABLE CAUSES:1. High voltage arcing. a. Reset F28 using the 25 mode (power the copier ON while simultaneously pressing the 2 and 5 keys), P45 to 0. b. Inspect the T/S corona, front and rear blocks. Note: If the HV is turned ON with the T/S corona removed, F28 will occur. c. Extend the HV contacting springs (front) and the contacting springs at the rear of the T/S assembly (grounding). d. Clean the contact points on the front T/S block - replace if needed. e. The transfer guide plate p/n 25HA-4561 is bent and too close to the transfer wire. The left edge of the plate should be 16mm above the inside bottomof the corona shell.

2. The corona currents are not set to specification. Set all currents to specification per 1015 Technical Bulletin #2.

3. Multiple devices on the same AC source.

4. Debris in the transfer corona shorts the corona wire to the transfer discharge plate (shell).Thoroughly clean the T/S corona.

5. No output from the high voltage unit due to an internal short.To verify HV unit failure, perform the following:: a. Remove the drum carriage and the T/S corona unit. b. Run the copier in the 36 mode (power the copier ON while simultaneously pressing the 3 and 6 keys); enter code 01, then press START PRINT. c. If the failure code reoccurs, inspect the high tension leads for insulation failure and replace if necessary. The high voltage unit (p/n 25HA84014) mayalso need replacing. d. If the problem does not occur, inspect the T/S corona unit, main charge unit and the drum carriage grounding. Repair or replace parts as necessary.

6. Arcing at the bias contact spring can cause an F28.


DescriptionDeveloper spew.SolutionPROBABLE CAUSES:1. If the developing unit is not completely emptied during a PM, the residual developer will compact and cause wear to the developer shaft and shaft holder.To prevent damage install the improved shaft holder (G-seal, p/n 26AA-3060).

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Note: The replacement of the shaft holder and felt seal (p/n 26AA30060) is only effective on machines where the developer shaft has NOT been worn. If theshaft is worn, the developing unit (p/n 26AA-3001) must be replaced.

2. Developer sleeve fatique. To verify, remove the developer unit and spin the developing unit magnetic roller by hand 10 to 20 times. If developer falls fromthe sleeve, replace the developing unit (p/n 26AA-3001). Verify that developer bias and corona currents are set to specification.


DescriptionHigh pitched noise, no ADD TONER indication.SolutionCAUSE: No add toner indication is due to short copy runs. ADD TONER will not be displayed until the toner motor is allowed to make 7-12 consecutiverotations during a copy run.

SOLUTION: Run at least 50 to 75 consecutive copies to check the ADD toner indication. Add toner to the machine after confirming operation.

Note: For immediate display of ADD TONER, install (p/n 101517-15.2).

Caution: With version 15.2 installed, air pockets in the toner hopper may cause premature ADD TONER indications.


DescriptionBlurred copies after power up or after reduction/enlargement is selected.SolutionPROBABLE CAUSES:1. The constant load spring of the fourth mirror assembly does not have sufficient pressure to return to its home position. Replace the load spring with thenew style load spring (p/n 508065211). The pressure of load has been increased from 145g to 215g.Replacement of the constant load spring is outlined in 1015/1212 Technical Bulletin #20 2. Heavy grease was used on the on the 4th mirror shaft. Clean the 4th mirror shaft and lubricate with multi oil.

3. The adjusting arm (p/n 25HA-6441) in the optics is out of position. Reposition the optics cam lever to push on the fourth mirror assembly.

4. The black idler roller mounted under the 4th mirror is binding. To free up the idler, relieve pressure from the side mount assembly, then clean and lubricatethe assembly.See Technical Education Bulletin #7A regarding lubricant applications.

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DescriptionHow to set up SMB (PC) Scanning.SolutionWhen setting up SMB (PC) Scanning on the 7145, three pieces of information must be obtained:1. Host Name: This will be the network name of the workstation you wish to scan to. Right click My Computer, select Properties, User Profiles and note theWorkgroup Name of the computer. Use only the name of the computer, do not include the domain name. Name has to be 13 characters or less.2. Folder: This is set up on the workstation and must be shared with all attributes selected.3. User Name and Password: This is what the customer uses to log their PC onto the network.( if you do not Results= ED09C7)Note: When setting up the Folder Name on the 7145, it must be designated with /. For example, if the shared folder on the workstation is Sample, it will beinput on the 7145 as /Sample.


DescriptionHow to update the firmware on a 7415 (fax option installed) via the serial port.SolutionTo upgrade the fax kit firmware via the serial port, perform the following:1. Obtain the fax firmware upgrade files. a. Access KBT's Home Page (http://www.konicabt.com). b. In the left-hand menu, click on SECURED. c. Enter a User ID and Password and click [Login]. d. Click on TECHNICAL. e. Click on [Download EPROMS]. f. Click on [EPROMS For Plain Paper Fax]. g. Click on [List Files]. h. Select the desired version of 7415 firmware and download to folder. i. When the file is extracted, note where the file is created.2. Connect a D sub 9-pin straight serial cable between the PC and the RS-232C port on the fax kit.3. Set the 7415 to firmware upgrade mode by pressing the START and STOP keys at the same time while powering the 7415 ON. *WAIT PROGRAM* willdisplay.4. Down load the data by using the DOS prompt. a. Set your COM port to proper settings (for COM1 use C:\ mode com1:19,n,8,1). b. Ensure you are in the directory that the firmware file was downloaded to. During the download process see below: Status for device COM1:---------------------------------------------Baud: 19200Parity: NoneData Bits: 8Stop Bits: 1ect ect.then you would enter:copy command:(c. Use the file copy command (C:\ copy /b XXXXa.bin..bin com1). copy/b 151VXXXa.bin com1


DescriptionCan the 7033 be used as a scanner?SolutionA scanning option is available. The following is the minimum configuration for the scanning feature to function:1. IP411 (PCUA 950401) installed.2. HD104 (PCUA 950421) installed.3. System software version 4.1.13.Note: To identify the system software version, print a system configuration page. If any other version earlier than 4.1.13 is identified, scanning is notavailable. Upgrading system software is not yet possible in the field. Contact the NSSG Hotline and request the procedure to upgrade the system softwareon the HD104.4. The 7033/7040 MUST be at minimum firmware level 42 (system) and level 25 (image). Firmware can be downloaded from the Konica [[FTP site | URLftp://kbtdigital:[email protected]]].Note: A finisher is not required for printing or scanning with the IP411.5. The KN302 network interface card (PCUA 950400) must be installed.6. The controller must have a minimum of 32MB of RAM (controller is shipped with 32MB installed).7. Scanned documents can be retrieved via Scantrip which is available on the [[Konica SEC website| URL http://www.sec.konicabt.com/main.html]]. Thisutility allows downloading of files from the hard drive to the workstation. An FTP client (i.e. [[SmartFTP*| URL http://www.smartftp.com/download/]] or [[FTPSurfer*| URL http://www.whispertech.com/surfer/download.htm]].) or Microsoft* Internet Explorer minimum version 5x is required to allow viewing of thescanned documents.Note: Document handling procedures or recommendations are not the responsibility of Konica Business Technologies USA, Inc.

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DescriptionMemory specifications, 7255.SolutionThe standard memory of the main body E-RDH is 64MB. There is one additional slot for memory which can be expanded to a maximum of 576MB.Additional memory is installed on the image CB located at the rear of the unit.Notes:1. Available Konica memory:ITEM # ITEM DIMM950631 MU-401 64MB950632 MU-402 128MB950588 MU-303 256MB960334 MU-304 512MB2. Other 256MB memory DIMM that can be used are as follows: The recommended 256MB DIMM is as follows: a. Century Microelectronics, Inc.* (PC133/256MB/NON ECC), DTV6E8-CL3 (Hitachi)* [[http://www.century-micro.com| URL http://www.century-micro.com]] b. Melco Inc.* PC133/256MB/NON ECC, VS133-256M (Toshiba)* [[http://www.melcoinc.com/english/index.html| URLhttp://www.melcoinc.com/english/index.html]]

SPECIFICATIONS1. 256MB (64bitx32M composition)/[16Mword x 8bit) synchronous DRAM x 16 + serial EPROM]/Clock frequency : (CL=2) 80 MHz and more/168-pin DIMM(a gold terminal).2. Banks on each SDRAM Device (BA1, BA0) : 4 Banks3. Row Addresses :RA0-RA114. Column Addresses :CA0-CA9

* Trademark ownership information


DescriptionF26 at power up or following TDS adjustment.SolutionPROBABLE CAUSES:1. The L-detect adjustment was performed with worn or depleted (not enough) developer; or a failed PCL.Replace the developer and perform the steps outlined below before performing the L-detect adjustment (47 mode, code 51).

Check TDS ang (analog) signal at the main board CN3-A5 to GND while running 47 mode, code 40.0.5 to 1.5V DC = overtoned1.5 - 2.0V DC = normal0.5V DC or less = bad TDS or lack of developer2.0 to 4.0V DC = undertoned4.0 or more = bad developer - replace the developerTDS sensor (p/n 083088110).

Verify PCL operation: Enter the 47 mode output code 51 for 15 seconds. THEN TURN THE MACHINE OFF. Check the drum, there should be no toner build-up on the surface. If toner is on the drum, check the PCL using the bypass tray solenoid connector, and 47mode output code 24.

2. Install the new style LED type PCL lamp per 2020 Technical Bulletin #32.


DescriptionLight copies, blotchy, poor density.SolutionPROBABLE CAUSES:1. The toner hopper is empty, however, the TLD sensor is coated with toner, therefore it will not vibrate to indicate ADD TONER.Check the voltage reading from the TLD sensor at CN3-A2 on the main board:TLD coated with toner = +6.7 V DC.TLD not coated = +4.1 V DC.

2. To alleviate light copies, perform all procedures outlined in 1018/2020 Technical Bulletin #16C .

3. Install version 16.0 EPROM as outlined in 1018/2020 Technical Bulletin #16C.

4. Check the TDS analog voltage to determine the toner concentration of the developer.Use 47 mode, code 40 while monitoring the ang signal at the main board at CN3-A5 to GND.0.5V DC to 1.5V DC = overtoned

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1.5V DC - 2.0V DC = normal0.5V DC or less = bad TDS or lack of developer2.0V DC to 4.0V DC = undertoned4.0V DC or more = bad developer - replace the developer

5. No add toner indication due to short copy runs.

6. The corona currents are not set to specification.

7. A worn drum, or improperly set drum currents.Install a new drum (PCUA 946211), and set the currents to specification.charge -600 10A DCtransfer -400 50A DCseparation 290 20A ACProcedure outlined in 2020 Technical Bulletin #11 .8. PCL lamp failure will result in residual charge build-up on the drum in multi-copy set resulting in high toner usage. The long term effect is reduced tonerconcentration and developer failure (light copies).Replace the PCL with the new style (LED) lamp p/n 029487061. See 1018/2020 Technical Bulletin #32 .

9. Too many high density images (originals with 50% or more black image area) or sky shots run concurrently.

10. Damp paper can cause poor density.Install the dew prevention heater kit p/n SE95-2810 to reduce the occurrence of damp paper.

11. The toner motor is not meshing with the toner addition drive.Adjust the toner motor position.

12. Dirty toner supply shaft assembly (p/n 5080-1560) and thrust spring (p/n 392015670). The spring is stuck in the depressed position and will not allow theshaft to engage with toner hopper auger.Clean shaft and spring.


DescriptionF35 at power up.SolutionTo reset: set 25 mode, P47 to 0.

PROBABLE CAUSES:1. TS1 (thermstat) open. Replace p/n 5520-8510.

2. Non OEM (original equipment manufacturer) upper roller installed. Thicker aluminum or iron core upper rollers will cause extended warm-up resulting inF35.Install a new Konica upper roller p/n 508053150.

3. L2 CONT signal at CN15-4 (main CB) does not go L at power up after resetting the failure code. Replace the main CB (p/n 5522-9010).

4. Lamp holder failure. Install new style lamp holders and terminal covers per 1018/2020 Technical Bulletin #41.

5. Program bug in the early version EPROM's (before level 13.3) Replace IC6 with p/n 101816-13.3 or the latest production level.


DescriptionExcessive toner consumption, toner spill under the drum carriage.SolutionPROBABLE CAUSES:1. To alleviate this problem, it is critical to implement all the steps outlined in 2020 Technical Bulletin #16C. .

2. New PCL, new drum, currents set to specification.

CEL failure. To verify the CEL, run a sky shot in 65% reduction on large paper. The pattern should reveal a reduced sky shot. If the entire copy is black, theCEL is not operating.Replace the CEL p/n 0830-7300 if necessary.

3. NOVRAM failure, memory scrambled. Replace NOVRAM (p/n


DescriptionDrum damage, developer spew, banding from lead-to-trail.

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SolutionPROBABLE CAUSES:1. The nylon DSD rollers on the developing unit become damaged (shrink) due to developer leakage. The magnetic roller is then too close to the drum,causing damage to the drum surface.Replace the drum casing (p/n 5520-K030).Note: Drum casings do not include the following parts: drum, toner supply unit, LED unit, charge corona unit, blade unit, front cover, knob label, PCL cover,PCL protection sheet, PCL board, cleaning upper cover, PF stay and blade spring holder. Remove these parts before replacing the drum casing.

2. Install the new style LED type PCL lamp per 1018/2020 Technical Bulletin #32 .Verify PCL operation: a. Run the 47 mode, output code 51, for 15 seconds. THEN POWER THE MACHINE OFF. b. Check the drum, there should be no toner build-up on the surface. If toner is on the drum, check the PCL using the bypass tray solenoid connector and47 mode, output code 24.

3. The main agitator shaft is worn, allowing developer to leak from the sides of the unit.Install the main agitator kit per 1018/2020 Technical Bulletin #27A (p/n SE95-2940).4. Drum shaft knob loose.Secure the drum knob.


DescriptionThe toner cartridge can not be fully inserted.SolutionPROBABLE CAUSES:1. A 2020 toner supply cover has been installed on a model 1018.If the drum carriage is exchanged between models, the toner supply cover should be changed or a modified toner supply cover (p/n 0831-3210) should beinstalled. A 1018 cover is labeled 0832 and will not allow the toner cartridge to be fully inserted. The 2020 cover is labeled 0831 and does allow properinstallation of the 2020 toner cartridge.

2. The toner cartridge shape has been changed. The green plastic cover for waste toner extends about 1-inch farther than before. The modified tonercartridge does fit in the copier, but toner build-up at the rear of the developing unit may inhibit full cartridge insertion.Verify the locking ears on the toner cartridge are flush with the drum carriage. If not, vacuum the rear area of the toner hopper to remove built up toner.

3. The incorrect toner cartridge is inserted.Check the rear of the toner cartridge to ensure that it is designated for the 1018. The plastic center should be the color blue.Note: Refer to the 1018/2020 Technical Bulletin #44 .

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DescriptionDrum damage.SolutionCAUSE: The nylon DSD rollers on the developing unit are damaged (smaller in diameter) due to developer leakage. This causes the magnetic roller to gettoo close to the drum, resulting in damage to the drum surface.

SOLUTION: Replace the drum casing (p/n 5520-K030).Note: Drum casings do not include the following parts: drum, toner supply unit, LED unit, charge corona unit, blade unit, front cover, knob label, PCL cover,PCL protection sheet, PCL board, cleaning upper cover, PF stay and blade spring holder. Remove these parts before replacing the drum casing.


DescriptionF26 at power up or following the TDS adjustment.SolutionPROBABLE CAUSES:1. If the L-detect adjustment is performed with worn or depleted (not enough) developer F26 can occur.Determine the cause of F26 by checking the TDS analog signal at the main CB CN3-A5 to GND while running the 47 mode, output code 40. The voltagesbelow indicate the condition of the developer:0.5 to 1.5V DC = overtonedDetone by running black copies.

1.5 - 2.0V DC = normal

0.5V DC or less = no signal from the TDS sensorCheck the wiring from TDS to the main CB.Check the level of developer in the developer unit.Replace the TDS sensor (p/n 083088110). 2.0 to 4.0V DC = undertonedRetone using the 47 mode, code 01.

4.0V DC or more = extremely undertonedReplace the developer. Verify that the PCL is operating.Install the new style LED type PCL lamp (p/n 029487061) as outlined in 2020 Technical Bulletin #32 .Note: When F26 occurs, the machine will allow a reattempt of the TDS adjustment only. All other functions will be inoperable unless the memory isreinitiallized (47 mode, output code 92).

2. Erroneous data in memory. The copier experienced a power problem which caused the memory data to be scrambled. Perform memory reinitializationusing the 47 mode, output code 92.Note: L-detect data; drum and PM counters; CVR, registration and lead edge deletion data will be set to initial values.

3. Memory IC failure. The memory chip (IC8) on the main CB will not hold settings after performing memory initialization (47 mode, output code 92).Replace the memory chip.


DescriptionExcessive toner consumption, toner spilled under the drum carriage.SolutionPROBABLE CAUSES:1. To alleviate this toner consumption problems, it is critical to implement the procedures outlined in 2020 Technical Bulletin #16C .

2. PCL failure. Replace the PCL with the new style (LCD lamp). See 2020 Technical Bulletin #32 .

3. A worn drum, or improperly set drum currents. Install a new drum (PCUA 946211), and set the currents to specification.charge -600 10A DCtransfer -400 50A DCseparation 290 20A ACThe adjustment procedure is outlined in 2020 Technical Bulletin #11 .

4. CEL failure. To verify the operation of the CEL, run a sky shot in 65% reduction on large paper. The pattern should reveal a reduced sky shot. If theentire copy is black, the CEL is not operating. Replace the CEL (p/n 0830-7300).


DescriptionLight copies, blotchy, poor density.

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SolutionPROBABLE CAUSES:1. The toner hopper is empty. However, the TLD sensor is coated with toner, therefore it will not vibrate to indicate ADD TONER.Check the voltage reading from the TLD sensor at CN3-A2 on the main board:TLD coated with toner 6.7V DC.TLD not coated 4.1V DC.

2. A failed TLD (toner level detecting sensor). If no voltage is read after performing step 1, replace the TLD (p/n 113687090).

3. To alleviate light copies, perform all procedures outlined in 2020 Technical Bulletin #16C .

4. Older version firmware is installed on the main CB. Install version 16.0 EPROM as outlined in Technical Bulletin #16C.

5. Check the TDS analog voltage to determine the toner concentration of the developer. Use the 47 mode, code 40 while monitoring the analog signal at themain board at CN3-A5 to GND. The voltages below indicate the condition of the developer:

0.5 to 1.5V DC = overtonedDetone by running black copies.



4.0V DC or more = extremely undertonedReplace the developer. Verify that the PCL is operating.

6. The developer unit auxiliary agitator gear is damaged or binding. Replace the gear (p/n 029420210).

7. No add toner indication is occurring due to short copy runs.

8. A worn drum, or improperly set drum currents. Install a new drum (PCUA 946211), and set the currents to specification.charge -600 10A DCtransfer -400 50A DCseparation 290 20A ACThe adjustment procedure is outlined in 2020 Technical Bulletin #11 .

9. PCL lamp failure will result in residual charge build-up on the drum in multi-copy set resulting in high toner usage. The long term effect is reduced tonerconcentration and developer failure (light copies).Replace the PCL with the new style (LCD lamp). See 2020 Technical Bulletin #32 .10. Multiple high density images (originals with 50% or more black image area) or sky shots run concurrently.

11. Damp paper can cause poor density. Install the dew prevention heater kit p/n SE95-2810 to reduce the occurrance of damp paper.

12. Incorrect toner was added. Purge the toning/developing system and replace the toner and developer with model 2020 supplies. Perform the L-detectand any necessary copy quality adjustments.

13. The developer agitator gears not turning. Agitation system is binding. Replace the drum casing (p/n 5520-K030).

14. A defective wiring harness between the main CB and the operation board. Replace the operation board assembly which includes the wiring harness fromthe operation board to the main CB (p/n 5522-7002).


DescriptionHigh pitched noise, no ADD TONER indication.SolutionPROBABLE CAUSES:1. ADD TONER is not indicated due to short copy runs. ADD TONER will not be displayed until the toner motor is allowed to make 7-12 consecutiverotations during a copy run after the TLD has detected the absence of toner.Run at least 50 to 75 consecutive copies to verify the ADD TONER indication.Note: Operation panel lamps can be checked using the 47 mode, code 48:1. Turn the machine off.2. Hold down the 4 and 7 keys while turning the copier on to enter the diagnostic mode.. 2. Release the 4 and 7 keys.3. Press the 4 key and then the 8 key.4. Press the Copy key. All panel lamps should come on.

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5. Turn the machine off then on to exit the diagnostic mode.Add toner to the machine after confirming operation.For immediate display of ADD TONER, install (p/n 202016-13.4).

Caution: With version 13.4 installed, air pockets in the toner hopper may cause premature ADD TONER indications.

2. The latest EPROM version was installed, but the copier memory was not reinitialized. Reinitialize memory (47 mode, code 92).


DescriptionF24 at power up or while copying.SolutionPROBABLE CAUSES:1. Open PCL lamp or loose CN64 on the drum carriage assembly. Reseat CN64 and replace the PCL lamp with the new style LED lamp (p/n 029487061) asoutlined in 2020 Technical Bulletin #32 .TO VERIFY THE PCL:1. Remove the PCL from the drum carriage2. Plug it into the bypass tray solenoid connector.3. Activate the lamp using 4/7 mode, code 24.If any segments do not light, replace the lamp with the new style assembly.

2. If the drum carriage becomes dislodged while copying the PCL circuit will open. Reinsert the drum carriage and install locking bracket (p/n 5520-1041).


DescriptionF23 power up, (M5) toner motor failure.SolutionCAUSE: Toner packed in the hopper or reverse EMF generated by M5 when the motor stops damaging IC30 on the main CB.

SOLUTION: Test the circuit by running M5 in 47 mode, code 01. Separate the gear drive so the motor can free spin without load.Replace the main CB and/or M5 as necessary.To reduce the failure of IC30 due to M5 binding or reverse EMF, install new toner supply wiring as outlined in 1018/2020 Technical Bulletin #38.

M5 p/n 4900-1610Main CB p/n 5522-9010

1018/2020 Technical Bulletin #38.


DescriptionF35 at power up.SolutionTo defeat the code, access the 25 mode, P47. Input 0 and press START PRINT.

PROBABLE CAUSES:1. Program bug in the early version EPROM's (before level 13.4). Replace EPROM IC6 with p/n 202016-13.4 or the latest production level (16.0 is latest5/10/96).

2. TS1 (thermstat) open. Replace p/n 5520-8510.

3. Non OEM (original equipment manufacturer) upper roller installed. Thicker aluminum or iron core upper rollers will cause extended warm-up resulting inF35.Install a new Konica upper roller p/n 508053150.

4. L2 CONT signal at CN15-4 (main CB) does not go L at power up after resetting the failure code. Replace the main CB (p/n 5522-9010).

5. Lamp holder failure. Install new style lamp holders and terminal covers per 1018/2020 Technical Bulletin #41.

6. The power is being shared with other equipment. A dedicated AC circuit is recommended.


DescriptionHow to clear fuser abnormality codes (F34, F35, F36), 2020.SolutionTo reset fuser codes, perform the following steps:1. Access the 25 mode (power the machine OFF. Hold down the 2 and 5 keys, and power the machine ON).

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2. Press P-4-7-P on the key pad. (1, 4, 5, or 6 will be displayed on the copy quantity indicator).3. Press the 0 key to change the indication to a zero.4. Press the start/print key to enter the new data.5. Power the machine OFF then ON to exit the 25 mode.

Note: If the F code reoccurs after powering the machine ON or following warm-up, contact service immediately.


DescriptionMachine shuts down and resets while copying, J00 or J16 displayed.SolutionCAUSE: Charge corona arcing. Dirty, coroded or loose connection from HV(A). Poor or no grounding for main charge corona assembly.

SOLUTION: Verify that the charge corona contact with the spring on the high voltage power supply. Also verify front clip on main charge assembly iscontacting drum carriage frame.

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DescriptionLight copies.SolutionPROBABLE CAUSES:1. The L-detect has been performed improperly. Install new developer (do not cycle machine until all steps are complete); thoroughly clean the recycle tube,disengage the toner hopper from the developer unit. Perform the L-detect adjustment.

2. The worm gear may be worn at the point of contact and is not driving the toner conveyance screw. If the density cannot be increased by adding tonerthrough the 47 mode output code 001. Check the toner supply motor, shaft angle (on hinge plate A) and the driving gears. Toner supply idler gear A (p/n25SA77291) and gear B (p/n 25SA77311) as well as the hinge plate A (p/n 25SA-3310) should be modified as indicated in 7050 Technical Bulletin #27 .

3. If copies or prints become lighter during a long run: Inspect the transfer separation corona assemblies and the high voltage power supply. The transfer corona may have been disassembled for cleaning. Thiscauses the relationship of the transfer guide material assembly (p/n 25SA-2660) to the rest of the corona to be incorrect. Due to the critical nature of theheight of the transfer guide material assembly, the guide is factory set. It is not to be adjusted or disassembled in the field. If guide is adjusted or removed,replacement of the entire corona assembly is required (p/n 25SA-2600). Note: (p/n 25SA-2660) is listed in the parts catalog as a separate part but is nolonger available. See 7050 Technical Bulletin #9 . For more information see parts view of transfer guide material assembly. Replace the corona assembly or the high voltage power supply.

4. The ADD TONER message is never displayed. Level 26 and above will allow display of the low toner indication as soon as the machine reaches that condition. 25 mode address 71 and address 13 are related. Address 71 will determine the amount of copies, after low toner is sensed, before the display will indicateADD TONER. Address 13 will determine the copy cycle action once the ADD TONER message has been displayed. Address 71 settings 0 = After 100 copies (Default) 1 = After 1,000 copies 2 = After 2,000 copies 3 = After 3,000 copiesNote: Address 71, settings 0-3 will allow the machine to continue to operate after ADD TONER is displayed, regardless of address 13. Only address 71,settings, 4-7 will perform the stop operation specified by address 13.Address 71 settings continued: 4 = After 100 copies 5 = After 1,000 copies 6 = After 2,000 copies 7 = After 3,000 copies

25 mode address 13 settings to specify copy cycle reaction at detection (ADD TONER). The machine will either try to finish the current sheet in progress ortry to complete the entire job before stopping the unit. 0 = Exit the sheet in progress (after 100 additional copies) and stop 1 = Exit the sheet in progress (after 1,000 additional copies) then stop 2 = Exit the sheet in progress (after 2,000 additional copies) then stop 3 = Exit the sheet in progress (after 3,000 additional copies) then stop 4 = Complete the entire job (up to 100 additional copies) then stop 5 = Complete the entire job (up to 1,000 additional copies) then stop (Default) 6 = Complete the entire job (up to 2,000 additional copies) then stop 7 = Complete the entire job (up to 3,000 additional copies) then stop

5. The charge corona and bias are not set to the target values.Adjust the charge corona to 170 and the bias to 169.

6. Poor bias to the developer unit.Check for continuity from the bias pin on the developing unit to the developing sleeve. If extremely high, remove the developing bearing from the rear of thedeveloping unit and check movement and continuity. If the bearing appears worn or has limited continuity, replace the bearing assembly (p/n 466078030).

7. Check for level 22.0 EPROMs. One symptom is low density which is noticed 1,000 copies/prints after power up. Level 22.0 has been identified as causinglight copies. Replace with latest level. EPROM history hyperlink .

8. The toner supply unit shutter is damaged, resulting in a buildup of toner which has broken the driving gears on the supply unit. Check the condition of theshutter unit. Replace damaged parts, including drive gears. Note: This type of damage occurs when technicians push the toner supply unit into its home position without the drum carriage installed. See 7050 TechnicalBulletin #8 .

9. The DCPS2 has failed and is outputting too much voltage to the projection lamp. The projection lamp voltage can be checked using 47 mode, outputmode 000 while measuring the output to the lamp between CN385-1 and CN385-3 on the DCPS2. The voltage should be 60DC.Replace the DCPS2 (p/n 25SA84520).

10. There is an open in the wiring harness. Check the wire harness at CN22-B4. If it is a constant 7V DC and there is no change in voltage when the TLDsensor is replaced, the toner unit wire harness (p/n 25SA90260) may need replacement.

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11. Faulty TLD, main CB. Machine never displayed add toner indication. Check the TLD for a change of signal by adding pressure to it out of the toner unit.If the signal does not change replace the TLD (p/n 25SA88030), if signal state changes replace the main CB.Note: New main CB from the part dept. are being shipped with the latest production level EPROMs however field machines may have different levels ofImage Processing board EPROMs. This can create error codes and other problems. In addition the Dallas chip on the new boards require the machine to bereinitialized prior to use. The procedure to reinitialize the machine to factory settings will reset the total counter to 0. As such hotline assistance is requiredfor this procedure.

12. Incorrect toner was added to this unit. This produced the light copies.Purge the toner and developer units and install fresh supplies.

If developer spew is also present:13. Carefully examine the drum for damage. The OPC material may be damaged exposing the aluminum core. This causes developer to adhere to the drumand spew.Replace drum, cleaning blade, toner guide roller, and developer.

14. Check machine to determine if key counters are used. In some cases, the timing of key counter removal can adversely affect the Dmax correctionadjustment. If the key counter is removed during the period when the automatic Dmax adjustment is performed (every 1000 copies), the Dmax value may beset lower and undertoning may result. The firmware requires upgrading. Install minimum level 21 EPROMs which will prevent undertoning due to key counterinteraction with Dmax. Installation of the latest level EPROMs is recommended. EPROM history hyperlink . Note: If, over a period of time, the problem does reoccur, disconnect the key count device.

15. Dmax data has been inadvertently reprogrammed Reinitialize the Dmax data with 47 mode, output code 18.

16. CN1 on the developing drive motor board (M3DB) is not fully connected. This causes the developing sleeve to rotate at an incorrect speed which affectsDmax readings. Check and reseat CN1.

17. Poor connection between the memory IC (or Dallas chip) and the main CB.Reseat memory IC on the main CB.

18. Loose pin on CN65-A3 of the main CB. This is the toner motor (M10) control signal.Reseat pins on CN65 of the main CB.

19. Failed NOVRAM on the main CB. The NOVRAM is losing the stored DMAX data.Initialize NOVRAM. If initialization fails to resolve the problem, replace NOVRAM (p/n DALLAS). The procedure to reinitialize the machine to factory settingswill reset the total counter to 0. As such hotline assistance is required for this procedure.

20. Partial light copies/prints only when fed through the bypass are a result of the improper output from HV2.Replace HV2.

21. Soiled write unit.Carefully remove the write unit and clean the polygon mirror. Follow the procedure in the Model 7050 Service Manual (2nd edition, 2/96) pages 2-47 to 2-50.

22. The mylar on the agitator plate, that wipes the TLD, is worn or missing. Replace the agitator plate (p/n 25SA-3270).

23. Dmax Error 3 count (veiwed in 47 mode output code 94) is high and increments each time a Dmax adjustment is attempted. TCSB is coated with toner orhas failed. Clean or replace TCSB (p/n 25SA-9100) as necessary. NOTE: If the adjustment mode display cannot be access using 47 mode output code 94,access 47 mode output code 96 and press start print. This should enable the adjustment mode to be displayed using output code 94 and pressing start print.


DescriptionCode 26 at power up or following the TDS adjustment (L-detect).SolutionPROBABLE CAUSES:1. Performing the L-detect adjustment with worn or depleted (not enough) developer will cause code 26 to occur.Replace the developer (PCUA 947106) and perform the L-detect adjustment (47 mode, output code 51). During the adjustment, measure the main CB atCN11-5 while in the 47 mode, output code 40 (main motor running). The voltages below indicate the condition of the developer:0.5 to 1.5V DC = overtoned (lessen toner concentration by running black copies)1.5 - 2.0V DC = normal0.5V DC or less = no signal from the TDS sensor: a. Check the wiring from TDS to the main CB. b. Check the level of developer in the developing unit. c. Replace the TDS sensor (p/n 587088010).2.0 to 4.0V DC = undertoned (increase toner concentration by running the toner motor in the 47 mode, output code 01).4.0V DC or more = extremely undertoned a. Replace the developer. b. Verify that the PCL is operating properly.If all of the TDS voltages are correct, then the main CB is not processing the signals correctly. Replace the main CB (p/n 5850-9302).

2. A poor connection at the rear of the fuser unit (CN69) for the temperature sensors. Reseat CN69.

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3. The TDS has failed because the main CB is applying 24V DC to CN11-1 instead of the normal 10V DC.Replace the main CB (p/n 5850-9302) and the TDS (p/n 587088010).Note: The TLD (p/n 113687090) may also require replacement as it is powered by the same 10V DC source.

4. PCL failure or open wiring to PCL. PCL failure will cause excessive recycling of toner. The developing unit toner auger conveys the recycled toner only tothe center where the TDS is located.Replace the PCL (p/n 113687060).


DescriptionCode 23 at power up or while copying.SolutionPROBABLE CAUSES:1. The toner hopper is binding.To inspect for binding, separate M3 from the driven gear then run the motor in 47 mode, code 01 to verify operation with no load. If the motor operates, themain board and motor are OK. Troubleshoot the hopper for binding.

2. M3 toner motor failure.If the motor is inoperable in diagnostics (separated from drive gear), replace the motor (p/n 3960-9050).

3. Main CB failure.If a new motor is installed and it does not operate in diagnostics, replace the main CB (p/n 5850-9301).CAUTION: If M3 or main CB failure is a possibility, install both parts when returning to the machine. Replace M3 first, then replace the main CB.

4. A failed optics unit wiring harness.Replace the optics unit wiring harness (p/n 585090201).Note: The wiring from M3 to the main CB is included in this harness.


DescriptionBackground on the front half and light on the rear half of copies.SolutionPROBABLE CAUSES:1. PCL failure will cause excessive recycling of toner. The developing unit toner auger conveys recycled toner only to the center where the TDS is located.As a result, the rear side of the developing unit will undertone. If this situation is not corrected, developer spew will occur.

To verify PCL operation, use a 9V DC battery to see if the all segments light. Replace the PCL if necessary (p/n 113687060).

2. Poor transfer current will also cause the amount of recycled toner to increase. Set the corona currents to specification using special meter lead (p/nSE95-1810):Charge: -505 5A DCTransfer: -251 16A DCSeparation: 298 13A AC

Refer to 1112 Technical Bulletin #2 for the adjustment procedure.

3. Main CB failure. The control signal to turn on the PCL, CN5-2 stays at 24V DC. Replace main CB (p/n 5850-9302).

4. Incorrect toner was installed. Background will occur at the rear of the copy first as new toner (not recycled) is introduced in the rear of the developer unit.Evacuate all toner and developer from the developer unit, cleaning unit (recycling system) and the toner hopper. Install the correct supplies (toner, 947-109)(developer, 947-106).


DescriptionDrum drive noise.SolutionPROBABLE CAUSES:1. The drum carriage spring clip plate (L) (p/n 587020320) is installed incorrectly. Attach the spring clip to the inside of the drum carriage front plate. Thespring should slide over guide pin and rest in the rear groove of pin.

2. Gear (E) is worn (p/n 392015051). Replace gear (E) and any other worn components.

3. The drum idler gear or drive shaft is worn. Install the drum idler gear shaft kit (p/n U081-2440) which was introduced in 1112 Technical Bulletin #3 .

4. The developer input spring has failed. Replace the developer input spring with the new style black spring (p/n 585015121).Refer to 1112 Technical Bulletin #1 .Note: The old style spring is silver in color.

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5. The second feed drive bushings are not properly lubricated. Remove the second feed drive gear, clean with alcohol and apply a small amount of multi-oil.

6. A build-up of toner under the developer mag roller will cause binding of the developer drive unit, producing a grinding noise.Clean the developer unit thoroughly and install a fresh charge of developer (PCUA 947106).


DescriptionHow to reset the PM message.SolutionTo reset the PM counter, perform the following steps:1. Turn the copier OFF.2. Hold down the 4 and 7 keys and turn the copier ON.3. Enter 9 then 0 and press the start/print key.4. Turn the machine OFF then ON to exit the 47 mode.


DescriptionCode 25 will not clear after adding toner.SolutionCAUSE: Toner is not contacting the TLD sensor due to an air pocket in the toner.

SOLUTION: Knock on toner hopper to eliminate air pockets.


DescriptionCode 20 at power up or while copying.SolutionPROBABLE CAUSES:1. Open wire or poor connection. No input at CN11-2 on the main CB (TLD signal not received). Verify 10V DC on CN11-1 (main CB).Check continuity from the drum carriage CN63 to the main CB CN11 (3 wires).Check for signal from the TLD to the main CB at CN11-2. It should measure 4V to 7V DC if operating correctly.

2. Failed TLD.Replace TLD (p/n 113687090).

3. No 10V DC to the toner level detect sensor (TLD) because ICP3, on the main CB, is open. Check CN11-1, on the main CB. If 10V DC is not indicated (operating voltage for the TLD) replace the main CB (p/n 5850-9302).Note: Confirm that the TLD wiring is not shorted or pinched to frame ground.


DescriptionHow to add toner, 1112.SolutionTo add toner to the 1112:1. Hold the toner tube so that the plastic strip in on top and the green handle is in the front.2. Hold and pull the plastic strip toward you as you insert the rear of the tube into the machine, pushing until it stops and then remove the plastic stripcompletely.3. Turn the green handle clockwise until it stops (the word LOCK should be horizontal and right side up).


DescriptionDeveloper spew from the rear of the developing unit.SolutionPROBABLE CAUSES:1. Worn developer can cause developer spew. Developer (PCUA 947106) must be replaced every 15,000 copies.

2. Leakage from the developing unit can occur when all of the developer is not emptied when new developer is installed. The excess developer createsexcessive force causing wear to the developing shaft holder and the developing shaft. If these areas are damaged and leaking, replace the developing unit(p/n 587A-3002).Note: A developing unit repair kit is not available for the 1112.

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DescriptionHow to program APS default when the ADF is lifted (8.5x11 or 8.5x11R default).SolutionTo program the APS default, perform the following:1. Disable smart glass, install EPROM (p/n 112019-12.1) EPROM history hyperlink .2. Then set the following 25 mode addresses: a. P06 to 2 for 8.5x11 default when the ADF is opened. Setting 25 mode, P6 to 2, 3, 6, or 7 = 8.5x11 default. Setting 25 mode, P6 to 0, 1, 4, 5, 8, or 9 = 8.5x11R default. b. P15 to 1 to enable the first priority mode. c. P16 to 2 to enable 8.5x11 as priority. d. P56 to 5 for individual auto button selection (P58 dependant), ADF priority when originals are placed in the ADF and APS deselected when the ADF isopened. e. P58 to 2 for initial state: ADF priority, APS non-priority and AES priority.See 1120 Technical Bulletin #4 (the "NOTE" in bulletin #4 is incorrect - please disregard).


DescriptionJ13.SolutionPROBABLE CAUSES:1. The machine is programmed for PFU installation (P91 set to 3); however, no PFU is attached. In 25 mode, set P91 to 0 and confirm that no otheraddresses contain erroneous data. A power problem may have occurred, spiking the memory.

2. The wiring harness installed from the main CB to the PFU is incompatible. Review the instructions included in the PFU to determine which style harness isnecessary. Refer to 1120 Technical Bulletin #1 for details.


DescriptionP25 while copying.SolutionCAUSE: More than 300 copies were made after the toner LED began blinking.

SOLUTION: Add toner. Replace developer if copy quality does not recover.


DescriptionExcessive trail edge deletion.SolutionPROBABLE CAUSES:1. An older version main CB EPROM is installed. Install the latest production EPROM, (p/n 112019-13.0).

2. The 25 mode and 36 mode adjustments are incorrect. a. Set the 25 mode, P70 to 3 (selection of original margin elimination) to allow the CEL to operate according to the paper size selected. (Thiscompensates for odd sized originals placed on the platen glass). b. Set the 36 mode, code 80, P8 to 40 (trail edge deletion adjustment) fine tune as necessary. The adjustment range is 1 to 64.

3. The screws that mount the ADF lock plate unit to the mainbody are too long, obstructing the optics movement. Install the M3x4 screws (p/n 00Z193041)included with the DF204 installation parts.


DescriptionP26 at power up. Occurs at new machine setup or following a PM.SolutionPROBABLE CAUSES:1. The L-detect adjustment was not performed following; a PM, memory initialization or new set-up. Perform the L-detect adjustment (47 mode, output code51).Note: L-detect (47 mode, output code 51) must be performed before adding toner at new machine set-up or toner addition will occur during the adjustmentresulting in an F26 code.

2. A poor connection at CN6 on the main CB. This will cause a problem where the code cannot be cleared and the 47, 25, and 36 modes cannot beaccessed. Power the copier OFF, remove and reconnect CN6, and power the copier back ON. CN6 is located on the left side of the main CB near the top ofthe board.

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DescriptionLatest EPROM level, 1120.Solution EPROM history hyperlink .


DescriptionP27 at power up.SolutionPROBABLE CAUSES:1. Poor connection between the TDS sensor and the main CB.Verify continuity.

2. TDS failure. No output (less than 0.2V DC) when the control signal is low. Replace the TDS sensor.


DescriptionST104, F77.SolutionPROBABLE CAUSES:1. One or more of the sorter bins is out of position. Reposition the bins to allow the guide pins to ride in the slot of the front and rear cams. Verify that MS203is being actuated.

2. The front and rear carrier supports (p/n 12QA48070) are installed incorrectly. Install the supports with the spring eyelet at the bottom.

3. The bushing that supports the shaft for the helical cam is installed backwards. This allows the shaft to drop and the beveled gears at the top to disengage.Reinstall the support bushing correctly.

4. The bin motor is binding. This caused the sorter CB to fail. Reinstall the bin motor to prevent binding, and replace the sorter CB (p/n 12QA-9900).


DescriptionToner specks or spots on copies. Drum surface may look cloudy or have a film on it.SolutionPROBABLE CAUSES:1. A bad lot of toner. Toner from the following lots '850725Z4A', '850725Z4B', and '850725Z4C' has been identified to cause this problem in high temperatureand high humidity environments. Replace the toner and developer. If the drum cannot be cleaned using isopropyl alcohol, the drum and blade will also haveto be changed. The failed drum can be returned using standard warranty program procedures. Refer to 1120 Technical Bulletin #10 for information on tonerfilming.



4. Excessive developer spillage inside machine. Effected serial number range is below 26EE10176. Refer to 1015/1212 Technical Bulletin #21 forinformation on the new style shaft holders and felt.


DescriptionF26 at power up or following the TDS adjustment (L-detect).SolutionCAUSE: Toner was added before performing L-detect during new machine setup. See 1120 Technical Bulletin #7 .

SOLUTION: 1. Run 47 mode, code 40 (3 minutes) to allow the excess toner in the TDS area to mix the toner with the developer.2. If code F26 reoccurs replace the developer (PCUA 947-226) and perform the L-detect adjustment again (47 mode, code 51).

Note: L-detect (47 mode, code 51) must be performed before adding toner at new machine set-up or toner addition will occur during the adjustment resultingin an F26 code.

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DescriptionHow to install the key counter mounting kit.SolutionA key counter kit (p/n SE95-3270) and EPROM (p/n 121217-12.0) are available. The installation procedure is outlined in 1015/1212 Technical Bulletin #19 .Set 25 mode, P52 to 1 to enable the key counter. The 1212 key counter mounting kit contents:PART NUMBER ITEM26AA73500 Key counter mounting plate26AAK0010 Positioning indication label00Z921321 Large wire clamp (2 pcs)00Z921941 Small wire clamp (2 pcs)00Z123062 Flat head screw (2 pcs)26AA90270 Key counter wiring26AA73500 Key counter installation instructions


DescriptionP27 at power up. P26 was previously indicated following the TDS adjustment (L-detect).SolutionPROBABLE CAUSES:1. Toner was added before performing the L-detect adjustment at new machine setup. See 1015/1212 Technical Bulletin #5A .

Only developer should be added during a new machine set-up so that toner does not cover the TDS sensor.To eliminate the code: a. Access the 47 mode, output code 40, and allow the main motor to run for approximately one minute. Any excess toner surrounding the TDS should mixwith the developer. b. Perform the L-detect adjustment again (47 mode, output code 51). c. If the problem remains, repeat steps a and b. d. If this does not correct the problem, replace the developer and perform the L-detect adjustment.

2. Disconnected or failed toner density sensor (TDS). Ensure that the TDS sensor is connected (CN95) at the drum carriage (behind the toner motor).Repair and/or reconnect the TDS connection. Replace the TDS (p/n 25HA88031) if deemed necessary.

3. Improperly seated memory IC (NOVRAM). Remove and reinsert the chip (IC28 on the main CB). Initialize the memory using the 47 mode, output code92. After installing new developer, perform the TDS adjustment (L-detect) using the 47 mode, output code 51.

4. PCL failure. If the PCL does not operate during the L-detect adjustment, toner will adhere to the drum and reduce the toner concentration during theL-detect adjustment. Replace the PCL (p/n 25HA-9340).


DescriptionTrail edge deletion on copies.SolutionCAUSE: Incorrect 4th mirror angle.

SOLUTION: Adjust the 4th mirror ramp position by loosening the 2 screws and moving the ramp towards the exit of the machine. Verify operation. If trailedge deletion area is less, but still not acceptable, then adjust the 4th mirror adjusting screw (p/n 490061630) counterclockwise approximately 1/4 a turn;confirm image quality. If necessary, continue turning adjustment screw 1/4 turn each time until trail edge deletion is eliminated. Adjust the lead edge timingand lead edge deletion as necessary.


DescriptionToner specks or spots on copies. Drum surface may look cloudy or have a film on it.SolutionPROBABLE CAUSES:1. A bad lot of toner. Toner from the following lots '850725Z4A', '850725Z4B', and '850725Z4C' has been identified to cause this problem in high temperatureand high humidity environments. Replace the toner and developer. If the drum cannot be cleaned using isopropyl alcohol, the drum and blade will also haveto be changed. The failed drum can be returned using standard warranty program procedures. Refer to 1015/1212 Technical Bulletin #22 for information ontoner filming.



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4. Excessive developer spillage inside machine. Effected serial number range is below 26EE10176. Refer to 1015/1212 Technical Bulletin #21 forinformation on the new style shaft holders and felt.


DescriptionHow to program auto shut-off and power saver mode.SolutionAuto shut-off will turn the machine OFF after a selected amount of non-use. Set 25 mode, P62 to:0: 0 minutes (auto shut-off mode, OFF)1: 2 minutes2: 5 minutes3: 10 minutes

Power saver mode is enabled by pressing the POWER SAVER button above the PRINT button.

The amount of time the copier remains in idle before the power saver mode is activated is determined by the data in 25 mode, P19:Data of 0 = 1 hourData of 1 = 2 hoursData of 2 = 3 hours


DescriptionHow to set paper sizes in cassettes.SolutionThe paper sizes are set up by configuring the buttons on the rear of the tray. To position the buttons, use the chart embossed on the paper tray.


DescriptionHow to add toner, 1212.SolutionTo add toner.1. Open the front door of the copier.2. Lift the green flap labelled PRESS HERE.3. Insert the cartridge.4. Slide the green lever to the left to empty the toner cartridge


DescriptionBlurred copies after power up or after reduction/enlargement is selected.SolutionPROBABLE CAUSES:1. The constant load spring of the fourth mirror assembly does not have sufficient pressure to return to its home position. Replace the load spring with thenew style load spring (p/n 508065211). The pressure of load has been increased from 145g to 215g.Replacement of the constant load spring is outlined in 1015/1212 Technical Bulletin #20 .2. Heavy grease was used on the on the 4th mirror shaft. Clean the 4th mirror shaft and lubricate with multi oil.

3. The adjusting arm (p/n 25HA-6441) in the optics is out of position. Reposition the optics cam lever to push on the fourth mirror assembly.

4. The black idler roller mounted under the 4th mirror is binding. To free up the idler, relieve pressure from the side mount assembly, then clean and lubricatethe assembly.See Technical Education Bulletin #7A regarding lubricant applications.


DescriptionCode 28 while copying.SolutionCAUSE: Arcing within the main charge corona unit.The corona wire cleaner has dislodged and is contacting the charge grid wires.

SOLUTION: Properly reposition the charge cleaner away from the grid wires.

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DescriptionLatest EPROM level, 1212.Solution EPROM history hyperlink .

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DescriptionHow to extend the time for Auto Low Power mode and Auto Shut-off mode.SolutionAuto Shut-off can be disabled by accessing the 25 mode address 20 and setting it to 1. To program the Auto Shut-off or Low Power Mode time, see below:

To program Auto Low Power mode time, perform the following:1. Access the 25 mode (power the machine OFF, hold down on the 2 and 5 keys, power the machine ON).2. Press P-03-P (Auto Low Power mode setting time selection).3. Press 1 (setting time + 120 minutes).4. Press the START/PRINT key.5. Press P19P.6. Input one of the following data choices: Enter 1: 122 minutes Enter 2: 125 minutes Enter 3: 130 minutes Enter 4: 135 minutes Enter 5: 150 minutes7. Press the START/PRINT key.

To program Auto Shut-off time, perform the following:1. Access the 25 mode (power the machine OFF, hold down on the 2 and 5 keys, power the machine ON).2. Press P-07-P3. Press 1 (Auto Shut-off time selection + 120 minutes).4. Press the START/PRINT key.5. Press P62P6. Input one of the following data choices: Enter 0: 150 minutes Enter 1: 180 minutes Enter 2: 210 minutes Enter 3: 240 minutes7. Press the START/PRINT key.8. Power the machine OFF/ON to exit the 25 mode.


DescriptionP25 at power up.SolutionCAUSE: Memory address 92 in the 25 mode is set to 0 (300 copies after the add toner message, P25 is displayed and copying is prevented until toner isadded). This function can be disabled by setting 25 mode address 92 to 1. It is recommended that this function be enabled to prevent damage to thedeveloper caused by toner depletion.

SOLUTION: Add toner.


DescriptionHow to program small size original default.SolutionCAUSE: Minimum Original Size Detection was not set for 8.5x11.

SOLUTION: To set Minimum Original Size Detection, perform the following:1. Access the 25 mode (power the machine OFF, then, while holding down on the 2 and 5 keys, power the machine ON).2. Press P-4-5-P (memory address 45) and enter the required value (in this case,a value of 2). The following are the data selections for address 45: 0: 8.5x11R 1: 5.5x8.5 2: 8.5x113. Press the Print button.4. Power the machine OFF/ON to exit the 25 mode.


DescriptionHow to install a Konica key counter.SolutionTo install the key counter, perform the following:1. Open the bypass tray door. On the lower, right-side of the main body there is a plate.2. Remove the plate, and disconnect the connector.

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3. Connect the key counter to the main body connector.4. Install the brackets from the key counter kit to the main body where the cover plate was removed.


DescriptionHow to set APS default to 8.5x11.SolutionTo program the 8.5x11 paper tray as a default with any size original copied from the platen glass, perform the following:1. Switch copier OFF.2. Enter the 25 mode by holding down the 2 and 5 keys simultaneously and powering the copier ON. Release the 2 and 5 keys approximately 4 secondsafter powering ON.3. Enter address 56 by pressing P-56-P sequentially. a. Enter data of 4 (disables APS when the ADF is opened). b. Press the Start/Print button to load the data.3. Enter address 51 (designates an initial tray when APS is cancelled) by pressing P-51-P sequentially. a. Enter data to select the 8.5x11 tray: 0= tray 1 1= tray 2 2= tray 3 3= tray 4 b. Press the Start/Print button to load the data.


DescriptionCorona current specifications, 1216.SolutionVR CODE SPECIFICATION CORONA1 02 -500A DC Charge2 03 -450A DC Transfer3 04 500A AC Separation

To adjust the corona currents, perform the following:1. Remove the T/S corona unit and drum carriage.2. Close the clamshell and cheat the front interlock switch.3. To adjust the charge current, connect the special red meter lead to the second of four HV contact springs from the right.4. Connect the black lead to frame ground.5. Set meter to A DC.6. Access the 47 mode (hold down 4 and 7 at power ON), output code 02.7. Press START/PRINT, adjust VR1 to -500A DC.8. Press STOP/CLEAR; connect the special red meter lead to the 3rd HV contact spring (transfer) from the right.9. Enter output code 03 and adjust VR2 to -450A DC.10. Press STOP/CLEAR; connect the special red meter lead to the 4th HV contact spring (separation) from the right.11. Set meter to A AC.12. Enter output code 04 and adjust VR3 to 500A AC.Notes: a. A special red meter lead with an in-line 10Mohm resistor (p/n LX15-0020) must be used in substitute of the standard red meter lead. A standard blackmeter lead is still used for ground (GND). b. VR1, VR2 and VR3 are to the left of the separation corona spring recessed in 3 small holes located the front frame. VR1 is in the left hole, VR2 is in the right hole, and VR3 is the lower hole.


DescriptionF26 at power up or following the TDS adjustment (L-detect).SolutionCAUSE: Toner was added before performing L-detect during new machine setup. Refer to 2223 Technical Bulletin #1 . SOLUTION: To prevent F26 error codes, perform the following:1. Access the 47 mode (press the 4 and 7 keys simultaneously while powering the copier ON), output code 40 (approximately 3 minutes) to allow the excesstoner in the TDS area to mix with the developer.2. If F26 reoccurs, replace the developer (PCUA 947226) and perform the L-detect adjustment again (47 mode, output code 51).Note: L-detect must be performed before adding toner at new machine setup or toner addition will occur during the adjustment, resulting in a F26 code.


DescriptionP27 at power up.Solution

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1216

CAUSE: Incorrect toner concentration in the developing unit.

SOLUTION: Replace the developer and perform a L-detect adjustment. To adjust L-detect, perform the following:1. Enter the 47 mode, output code 51.2. Press the start/print button.3. The number 51 flashes in the display for approximately 90 seconds.4. When 51 stops flashing, the adjustment is complete.5. Power the copier OFF/ON to exit the 47 mode.


DescriptionHow to reset the drum counter.SolutionTo reset the drum counter, perform the following:1. Access 47 mode (power ON while holding 4 and 7 keys), output code 91.2. Power the copier OFF/ON to exit the 47 mode.Note: To verify the drum count has been reset, hold the P key and press the 7 key. A two-digit number should flash (00) indicating the drum count X1000.


DescriptionUnable to select more than one copy at a time.SolutionCAUSE: Copy quantity setting limit selection incorrect.

SOLUTION: To program copy quantity setting, perform the following:1. Access the 25 mode (power the machine OFF, hold down on the 2 and 5 keys, power the machine ON).2. Press P-13-P (Copy Quantity setting limit selection).3. Press 0 (setting Max) unlimited.4. Press the START/PRINT key.6. Input one of the following data choices: Enter 0: MAX (unlimited up to 99) Enter 1: 1 limit Enter 2: 3 limit Enter 3: 5 limit Enter 4: 9 limit Enter 5: 10 limit Enter 6: 20 limit Enter 7: 30 limit Enter 8: 50 limit Enter 9: 99 limit

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DescriptionMulti-feeding from Tray 1 resulting in paper feed jams (J32).SolutionCAUSE: Insufficient pressure applied to the paper feed stopping lever by the cam spring.

SOLUTION: There is a new style cam spring available for machines with serial numbers between 26ME19201 and 26ME19966. Replace cam spring (p/n26MA45391). Notes:1. See 1312 Technical Bulletin #1 for complete installation instructions.2. To view the PDF, Acrobat* Reader must be installed. Acrobat Reader can be downloaded for free from the Adobe* Web site at:[[http://www.adobe.com/products/acrobat/readstep2.html| URL http://www.adobe.com/products/acrobat/readstep2.html]].

* Trademark ownership information


DescriptionHow to clear a fuser abnormality code (F34, F35, F36).SolutionTo clear a fuser abnormality code, perform the following: With the copier powered ON displaying the fuser failure code, simultaneously press and hold down the enlargement (up arrow) and reduction (down arrow)keys for approximately 5 seconds until a destination code (US) is displayed.2. Press 0 within 2 seconds after the destination code (US) is displayed. Note: Do not press 0 too fast. 3. Access the 25 mode (enter 2 then 5, from the keypad, and then press START PRINT). a. [A- -] should now be displayed in the quantity window.4. Enter address number 47, then press START PRINT.5. Reset the fuser failure code data by pressing 0 twice, then press START PRINT.6. Press the STOP/CLEAR button 3 times until the copier reverts to the normal mode.Note: When the STOP/CLEAR button is pressed only once, the copier returns to the previous diagnostic state.


DescriptionP29 during copier operation.SolutionCAUSE: Developing unit requires replacement. Copy count reaches 25,000 (steady P29) or toner is depleted from the developing unit (blinking P29 withcopier operation stopped).

SOLUTION: Replace the developing unit (PCUA 947157) and perform the initialization. To initialize the developing unit, perform the following:1. With the copier powered ON, press the SELECT PAPER button for approximately 5 seconds. [C- -] is displayed in the quantity window.2. Enter 5, then 1, with the keypad. Press the START PRINT button. The initialization process starts. [C51] is displayed in the quantity window.Note: The process takes approximately 6 minutes.3. On completion of the initialization, [C- -] appears again in the quantity window. Press the STOP/CLEAR button.4. The copier reverts to normal operation.


DescriptionHow to adjust exposure.SolutionTo adjust exposure, perform the following:1. With the copier powered ON in the 1:1 copy mode, simultaneously press the enlargement and reduction keys for approximately 5 seconds.2. When the destination code (US) is displayed, press 0 within 2 seconds. Note: Do not press 0 too fast.3. Access the 36 mode (enter 3, then 6 from the keypad). [ACC] is displayed in the quantity display.4. Enter the desired address (code) number, then press START PRINT.CODE ADJUSTMENT 86 Center intensity (enlargement) 87 Center intensity (reduction) 88 Maximum intensity (life size) 89 Center intensity (life size) 90 Minimum intensity (life size)5. Change the blinking setting data to the required data (adjustment range of 01 to 64 with a default of 32), then press START PRINT.6. Press the START PRINT key again to make a test copy of the settings.7. After copying, the status returns to step 5. Make any additional data adjustments, if required. 8. When adjustment is complete, press the STOP/CLEAR button until the copier reverts to the normal mode.Note: When the STOP/CLEAR button is pressed only once, the copier returns to the previous diagnostic state.

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DescriptionBackground on copies after doing a PM and replacing the drum.SolutionCAUSE: Main erase lamp is worn or disconnected.

SOLUTION: Reseat drum and connectors, and/or replace the Main Erase Lamp (p/n 26MA10060).


DescriptionP26 after replacing developing unit.SolutionCAUSE: Developing unit has not been initialized.

SOLUTION: To initialize the developing unit, perform the following:1. With the copier powered ON, press the SELECT PAPER button for approximately 5 seconds. [C- -] is displayed in the quantity window.2. Enter 5, then 1, with the keypad. Press the START PRINT button. The initialization process starts. [C51] is displayed in the quantity window.Note: The process takes approximately 6 minutes.3. On completion of the initialization, [C- -] appears again in the quantity window. Press the STOP/CLEAR button.4. The copier reverts to normal operation.


DescriptionP24 during copier operation.SolutionCAUSE: The number of copies on the drum unit has reached 24,500 (steady P24 and copier operation continues). Drum replacement interval is 25,000sheets. When 500 sheets are copied after the steady P24, a change drum condition is indicated (blinking P24).

SOLUTION: Replace the drum unit (PCUA 947158) and perform initialization. To initialize the drum unit, perform the following:1. With the copier powered ON, press the SELECT PAPER button for approximately 5 seconds. [C- -] is displayed in the quantity window.2. Enter 5, then 0, with the keypad. Press the START PRINT button. The initialization process starts. [C50] is displayed in the quantity window.Note: The process takes approximately 1 minute.3. On completion of the initialization, [C- -] appears again in the quantity window. Press the STOP/CLEAR button.4. The copier reverts to normal operation.


DescriptionHow to enable/disable the power saving mode.SolutionThe power saver enable time is programmable from 2 minutes to 240 minutes (4 hours). If address 20 in the 25 mode is set to OFF, the power saving modeis disabled. To program the power saving mode, perform the following:1. With the copier powered ON in the 1:1 copy mode, simultaneously press the enlargement and reduction keys for approximately 5 seconds.2. When the destination code (US) is displayed, press 0 within 2 seconds.3. Access the 25 mode (enter 2, then 5 from the keypad). Press START PRINT. [A- -] is displayed in the quantity display.4. Enter address number 20, then press START PRINT.5. Select and enter the desired time interval:DATA TIME (minutes) 1 Address 62 setting takes precedence (default) [allows 30, 2, or 5 minute setting] 2 OFF (disabled) 3 60 4 120 5 240Note: If a power save mode setting of 30 minutes or less is desired, data setting of 1 must be input at address 20, then skip step (6) and proceed from step(7).Press START PRINT to set the data.6. Press the STOP/CLEAR button 3 times until the copier reverts to the normal mode.7. Enter address number 62, then press START PRINT. 8. Select and enter the desired time interval:DATA TIME (minutes) 1 30 (default) 2 2 3 5Press START PRINT to set the data.9. Press the STOP/CLEAR button 3 times until the copier reverts to the normal mode.

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DescriptionHow to install a key counter.SolutionKey counters are not compatible with this product and cannot be installed.


Descriptiond01' is displayed in the control panel window after replacing the main CB (p/n 26MA-9010).SolutionCAUSE: The CB needs to be reset to factory defaults.

SOLUTION: To reset the CB to factory defaults perform the following:1. Press and hold the "Enlarge" and "Reduce" keys for 5 seconds.2. Press 0 within 2 seconds after the destination code is displayed. 3. Input 47 and press the Start Print key. 4. Input 92 and press the Start Print key (CLR will be displayed).5. Press the Start Print key immediately. 6. The display will return to 01.

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DescriptionCode 34.SolutionTo reset fuser codes, perform the following steps:1. Access the 25 mode (power the machine OFF. Hold down the 2 and 5 keys, and power the machine ON).2. Press 4-7-P on the keypad. (1, 4, 5, or 6 will be displayed on the copy quantity indicator).3. Press the 0 key to change the indication to a zero.4. Press the start/print key to enter the new data.5. Power the machine OFF then ON to exit the 25 mode.

Note: If the F code reoccurs after powering the machine ON or following warm-up, contact service immediately.

PROBABLE CAUSES:1. Old style temperature sensor installed. Install the new style (convex) temperature sensor (p/n 490088033) and perform the AES adjustment (47 mode,code 98). See 1290RE Technical Bulletin #4C .2. The lamp contact assemblies on the front and rear of the fusing unit are loose, resulting in poor lamp contact. Install the heater cover kit (p/n SE97-1990).See 1290RE Technical Bulletin #10.Kit contents:PART NUMBER ITEM392053233 Terminal cover (2)5850-5410 Heater cover unit (front)5850-5420 Heater cover unit (rear)00Z153081 Screw (SEMS I, M3x8)00Z163081 Screw (SEMS II, M3x8)Note: Ensure that there are no power problems at the customer site.


DescriptionLight copies, blotchy, poor density.SolutionPROBABLE CAUSES:1. Toner was not added by the user when the ADD TONER light came on. Add toner and perform 47 mode, output code 01 to tone up the developer. 2. The toner hopper is empty, however, the TLD sensor is coated with toner. In this case the TLD will not vibrate to indicate add toner. Check the voltagereading from the TLD sensor at CN3-A2 on the main CB:TLD coated with toner = +6.7 V DC.TLD not coated = +4.1 V DC.

3. Check the TDS analog voltage to determine the toner concentration of the developer.Use the 47 mode, code 40 while monitoring the ang signal at the main CB at CN3-A5 to GND. The voltages below indicate the condition of the developer:

0.5 to 1.5V DC = overtonedDetone by running black copies.



4.0V DC or more = extremely undertonedReplace the developer. Verify that the PCL is operating.

4. No add toner indication due to short copy runs. ADD TONER will not be displayed unless the machine calls for toner at least seven times (consecutively)during a run. If the TLD is audible, but the machine does not indicate ADD TONER, run about 10 copies in a row.

5. The corona currents are not set to specification. The drum currents and adjustment procedures are outlined in 1290RE Technical Bulletin #7 .Charge: -510 10A DCTransfer: -360 50A DCSeparation: 270 20A AC

6. The toner supply coupling is broken. No drive is imparted to the toner supply unit. Replace the toner supply coupling (p/n 392015640).

7. PCL lamp failure will result in residual charge buildup on the drum in multi-copy set resulting in high toner usage. The long term effect is reduced tonerconcentration and developer failure (light copies). Replace the PCL (p/n 113687060).

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8. Too many high density images (originals with 50% or more black image area) or sky shots run concurrently.

9. Damp paper can cause poor density. Install the dew prevention heater kit (p/n SE95-2560) to reduce the occurrence of damp paper.

10. The rear ladder chain has fallen off the ladder wheel within the toner supply unit. Causing the toner supply shaft not to turn. Replace the ladder chain.

11. The developer sleeve is not turning because the spring for the developer drive is worn or missing. Replace the developer arm spring (p/n 490015320).


DescriptionCode 24.SolutionPROBABLE CAUSES:1. One or more of the tungsten lamps within the PCL assembly are open. Replace the PCL assembly (p/n 113687060).

2. Drum carriage is not completely seated. Open the clamshell and reinsert the drum carriage.

3. Inspect the main CB, F1 (fuse). If open inspect the PCL wiring, repair as necessary. Replace the main CB (p/n 4900-9301).


DescriptionHow to clear fuser abnormality codes (F34, F35, F36), 1290RE.SolutionTo reset fuser codes, perform the following steps:1. Access the 25 mode (power the machine OFF. Hold down the 2 and 5 keys, and power the machine ON).2. Press 4-7-P on the key pad. (1, 4, 5, or 6 will be displayed on the copy quantity indicator).3. Press the 0 key to change the indication to a zero.4. Press the start/print

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