Ошибка 7620 kyocera

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1. 03-14-2018

   
   

   #1

   Ta2550ci error code c7620 and c7601
   

   Back in December of 17, I had a service call on this particular TA2550ci for bad quality. After assessing the needs of the copier I had to order and install a cyan and black developer and drum. the image on it was light in bars similar to when developers start to fail. in addition, there was a lot of cyan developer material in the rear of the copier. when I put the new developers and drums in, the Image became really light and I had a machine error code of C7620. That error states: ID sensor timing error Color registration correction was failed. I looked into the error history and there were over 120 of this error as well as C7601. Obviously thats not a good thing. both point to registration sensors that look at the underside of the belt. So I replaced the sensors. Still no dice. I called kyocera tech support and their answer was engine board. I installed that and the problem was still there. Image was light all the way across, but only for cyan and black. I called my kyocera rep and together we spent a day swapping parts back and forth between a known good machine and a used machine. we swapped High voltage, engine, main, low voltage, we did a full pm onto the copier with no change to the image quality. We ran hundreds of sample pages through the copier and ran dev refresh and drum refresh to try and get the image back. finally I swapped the little board on the left side of the copier that gives charge to the transfer belt. The best I was able to get it was nearly solid pages with little 1-2 inch light bars randomly with skyshots. half tone copies looked fine though u089. I called it case closed and the copier was returned to the customer. just this morning the problem of cyan and black faded lines is back. I printed the error history and now instead of 120 of the error codes, there is now 255 of each. Im just asking on here in case someone else has had this issue. any thoughts or ideas you may have about the issue will be very much apprciated.

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2. 03-14-2018

   
   

   #2

   Re: Ta2550ci error code c7620 and c7601
   

   Did you replace the belt?

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3. 03-14-2018

   
   

   #3

   Re: Ta2550ci error code c7620 and c7601
   

   I replaced the transfer belt, and then I replaced it again with a Maintenance Kit A, since it was a short ways away from the A maintenance. I also put in a second cyan developer. since the inital call there has been slightly over 1200 color prints on the copier.

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4. 03-14-2018

   
   

   #4

   

   
   Trusted Tech
   

   50+ Posts

   

   

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   Rep Power

   13

   Re: Ta2550ci error code c7620 and c7601
   

   wow looks like done just about everything. possible the line voltage is causing the problem? try hooking up a meter to the line that records the hi and low voltage and go back the next day to check it. worth a try?

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5. 03-15-2018

   
   

   #5

   Re: Ta2550ci error code c7620 and c7601
   

   Did you happen to save any of those hundreds of sample pages?

   As an aside, endusers always assume that it’s exactly the same problem as before. Sometimes it is … and sometimes it isn’t. Never assume the customer is providing you accurate information. If your going to assume something, assume that you’ll have to make your own observations. =^..^=

   Last edited by blackcat4866; 03-15-2018 at 12:55 AM.

   If you’d like a serious answer to your request:
   1) demonstrate that you’ve read the manual
   2) demonstrate that you made some attempt to fix it.
   3) if you’re going to ask about jams include the jam code.
   4) if you’re going to ask about an error code include the error code.
   5) You are the person onsite. Only you can make observations.
   
   blackcat: Master Of The Obvious =^..^=

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6. 03-15-2018

   
   

   #6

   

   
   Senior Tech
   

   250+ Posts

   

   

   

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   Rep Power

   19

   Re: Ta2550ci error code c7620 and c7601
   

   is there any crud on the ID sensors ?
   is it still logging C76XX codes?

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7. 03-15-2018

   
   

   #7

   Re: Ta2550ci error code c7620 and c7601
   

   the Id sensors are brand new (replaced in december) and they are clean when i move the shutter to the side to see them. Im still getting the errors, but When i visited the machine this morning I decided to try something I did not do last time. I taped the ID sensor shutter into the open position to see if It would give the error codes. That is yet to be seen, but I did two developer refreshes and 2 calibrations on the machine to bring some of the faded areas back. Im including a scan of the copy quality Im getting from skyshots. yellow is doing the same as black and magenta.

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8. 03-16-2018

   
   

   #8

   Re: Ta2550ci error code c7620 and c7601
   

   If your density is not good, which it’s not, you’ll never get rid of the ID sensor errors. The sensors aren’t seeing the patches, therefore can’t perform any process control functions.

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9. 03-16-2018

   
   

   #9

   Re: Ta2550ci error code c7620 and c7601
   

   Shot in the dark? Laser. Is the machine in a dusty location?

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10. 03-16-2018

    
    

    #10

    Re: Ta2550ci error code c7620 and c7601
    

    the laser hasn’t been replaced, though i have cleaned it off. I have the ID sensors exposed all the time until I get the parts which are to arrive on monday. according to the error log, its always getting the c-codes first thing in the morning when it gets turned on. The machines location is in a church office that isnt very dusty. Last time I visited the machine (thursday morning), I found the start of cyan developer material in the rear of the paper path and on the transfer roller (not belt). this tells me that the machine is over-toning itself dry.

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Tags for this Thread

• Code: 0030
• Description: FAX control PWB system error
  Processing with the fax software was disabled due to a hardware problem.
• Causes: Defective FAX control PWB.
• Remedy: Replace the fax control PWB and check for correct operation.

• Code: 0070
• Description: FAX control PWB incompatible detection error
  In the initial communication with the FAX control PWB, the normal communication command is not transmitted.
• Causes: Defective FAX software.
  Defective FAX control PWB.
• Remedy: Defective FAX software. Install the fax software.
  Defective FAX control PWB. Replace the fax control PWB and check for correct operation.

• Code: 0100
• Description: Backup memory device error
• Causes: Defective flash memory.
  Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: 0120
• Description: MAC address data error
  The data includes an invalid MAC address.
• Causes: Defective flash memory.
  Defective engine PWB.
• Remedy: Defective flash memory. Replace the main PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 0130
• Description: Backup memory read/write error (main PWB)
• Causes: Defective flash memory.
  Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: 0140
• Description: Backup memory data error (main PWB)
• Causes: Defective flash memory.
  Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: 0150
• Description: Backup memory read/write error (engine PWB)
  Detecting engine PWB EEPROM communication error.
• Causes: The engine PWB EEPROM was improperly installed.
  Defective engine PWB.
  Defective EEPROM.
• Remedy: The engine PWB EEPROM was improperly installed. Check the EEPROM is properly installed and remedy if necessary.
  Defective engine PWB. Replace the engine PWB and check for correct operation.
  Defective EEPROM. Contact the Service Administrative Division.

• Code: 0160
• Description: Backup memory data error (engine PWB)
• Causes: Defective flash memory.
  Defective engine PWB.
• Remedy: Replace the engine PWB and check for correct operation.

• Code: 0170
• Description: Billing counting error
  A checksum error is detected in the main and engine backup memories for the billing counters.
• Causes: Data in the EEPROM.
  Defective PWB.
• Remedy: Data in the EEPROM . Contact the Service Administrative Division.
  Defective PWB. Replace the main PWB or the engine PWB and check for correct operation.

• Code: 0180
• Description: Machine number mismatch
  Machine number of main and engine does not match.
• Causes: Data in the EEPROM .
• Remedy: Contact the Service Administrative Division.

• Code: 0320
• Description: I/O CPU communication error
  A communication error is detected 10 times in succession.
• Causes: Defective PWB.
• Remedy: Replace the main PWB or the engine PWB and check for correct operation.

• Code: 0800
• Description: Image processing error
  The JAM100 fee counter is continuously generated.
• Causes: Defective main PWB.
• Remedy: Replace the main PWB and check for correct operation.

• Code: 0830
• Description: FAX control PWB flash program area checksum error
  A checksum error occurred with the program of the FAX control PWB.
• Causes: Defective FAX software.
  Defective FAX control PWB.
• Remedy: Defective FAX software. Install the fax software.
  Defective FAX control PWB. Replace the FAX control PWB.

• Code: 0840
• Description: Faults of RTC
  The time is judged to go back based on the comparison of the RTC time and the current time or five years or more have passed.
• Causes: The battery is disconnected from the main PWB.
  Defective main PWB.
• Remedy: The battery is disconnected from the main PWB. Check visually and remedy if necessary
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 0870
• Description: FAX control PWB to main PWB high capacity data transfer error
  High-capacity data transfer between the FAX control PWB and the main PWB of the machine was not normally performed even if the data transfer was retried the specified times.
• Causes: Improper installation FAX control PWB.
  Defective FAX control PWB or main PWB.
• Remedy: Improper installation FAX control PWB. Reinstall the FAX control PWB.
  Defective FAX control PWB or main PWB. Replace the FAX control PWB or main PWB and check for correct operation.

• Code: 0920
• Description: Fax file system error
  The backup data is not retained for file system abnormality of flash memory of the FAX control PWB.
• Causes: Defective FAX control PWB.
• Remedy: Replace the FAX control PWB and check for correct operation.

• Code: 1010
• Description: Lift motor error
  After cassette 1 is inserted, the lift sensor does not turn on within 12 s. This error is detected four times successively.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of the lift motor.
  Defective lift motor.
  Defective engine PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair any problem that is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity of the connector cable. If necessary, replace the cable. Lift motor and engine PWB (YC1)
  Defective drive transmission system of the lift motor. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if necessary.
  Defective lift motor. Replace the lift motor.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 1020
• Description: PF lift motor 1 error (paper feeder)
  After cassette 2 is inserted, PF lift sensor 1 does not turn on within 12 s. This error is detected four times successively.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of the PF lift motor 1.
  Defective PF lift motor 1.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair any problem that is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity of the connector cable. If necessary, replace the cable. PF lift motor 1 and PF main PWB (YC4)
  Defective drive transmission system of the PF lift motor 1. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if necessary.
  Defective PF lift motor 1. Replace the PF lift motor 1.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual of the paper feeder).

• Code: 1030
• Description: PF lift motor 2 error (paper feeder)
  After cassette 3 is inserted, PF lift sensor 2 does not turn on within 12 s. This error is detected four times successively.
• Causes: Defective bottom plate elevation mechanism in the cassette.
  Defective connector cable or poor contact in the connector.
  Defective drive transmission system of the PF lift motor 2.
  Defective PF lift motor 2.
  Defective PF main PWB.
• Remedy: Defective bottom plate elevation mechanism in the cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity of the connector cable. If necessary, replace the cable. PF lift motor 2 and PF main PWB (YC7)
  Defective drive transmission system of the PF lift motor 2. Check if the gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective PF lift motor 2. Replace the PF lift motor 2.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual of the paper feeder).

• Code: 1800
• Description: Paper feeder communication error
  A communication error is detected 10 times in succession.
• Causes: Improper installation of the paper feeder.
  Defective connector cable or poor contact of the connector.
  Defective engine PWB.
  Defective PF main PWB.
• Remedy: Improper installation of the paper feeder. Follow the installation instruction carefully again.
  Defective connector cable or poor contact of the connector. Reinsert the connector. Also check for continuity of the connector cable. If necessary, replace the cable. PF main PWB (YC3) and engine PWB (YC20)
  Defective engine PWB. Replace the engine PWB and check for correct operation.
  Defective PF main PWB. Replace the PF main PWB (Refer to the service manual of the paper feeder).

• Code: 1900
• Description: Paper feeder EEPROM error
  When writing the data, the write data and the read data is not continuously in agreement 4 times.
• Causes: Defective PF main PWB.
  Device damage of EEPROM.
• Remedy: Defective PF main PWB. Replace the PF main PWB (Refer to the service manual of the paper feeder).
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: 1950
• Description: Transfer belt unit EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Defective transfer PWB.
  Device damage of EEPROM.
• Remedy: Defective transfer PWB. Replace the transfer PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: 2101
• Description: Developer motor K steady-state error
  The rated speed signal detected the stability OFF continuously for 1 s after the developer motor K stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity of the connector cable. If necessary, replace the cable. Developer motor K and engine PWB (YC4)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if necessary.
  Defective motor. Replace the Developer motor K.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2102
• Description: Developer motor YCM steady-state error
  The rated speed signal detected the stability OFF continuously for 1 s after the developer motor YCM stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer motor YCM and engine PWB (YC3)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the Developer motor YCM.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2111
• Description: Developer motor K startup error
  Developer motor K is not stabilized within 2 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity of the connector cable. If necessary, replace the cable. Developer motor K and engine PWB (YC4)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if necessary.
  Defective motor. Replace the Developer motor K.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2112
• Description: Developer motor YCM startup error
  Developer motor YCM is not stabilized within 2 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If necessary, replace the cable. Developer motor YCM and engine PWB (YC4)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if necessary.
  Defective motor. Replace the Developer motor YCM.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2201
• Description: Drum motor K steady-state error
  The rated speed signal detected the stability OFF continuously for 1 s after the drum motor K stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor K and engine PWB (YC3)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the Drum motor K.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2202
• Description: Drum motor YCM steady-state error
  The rated speed signal detected the stability OFFcontinuously for 1 s after the drum motor YCM stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor YCM and engine PWB (YC3)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the Drum motor YCM.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2211
• Description: Drum motor K startup error
  Drum motor K is not stabilized within 2 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor K and engine PWB (YC3)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the Drum motor K.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2212
• Description: Drum motor YCM startup error
  Drum motor YCM is not stabilized within 2 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum motor YCM and engine PWB (YC3)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the Drum motor YCM.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2300
• Description: Fuser motor steady-state error
  The rated speed signal detected the stability OFF continuously for 1 s after the fuser motor stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser motor and engine PWB (YC4)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the Fuser motor.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2310
• Description: Fuser motor startup error
  Fuser motor is not stabilized within 2 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser motor and engine PWB (YC3)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the fuser motor.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2550
• Description: Conveying motor steady-state error
  The rated speed signal detected the stability OFF continuously for 1 s after the conveying motor stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Conveying motor and engine PWB (YC2)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the Conveying motor.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2560
• Description: Conveying motor startup error
  Conveying motor is not stabilized within 2 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Conveying motor and engine PWB (YC2)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the conveying motor.
  Defective PWB. Replace the engine PWB and check for correct operation.

• Code: 2600
• Description: PF drive motor error (paper feeder)
  When the PF drive motor is driven, error signal is detected continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. PF drive motor and PF main PWB (YC2)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushes and gears. Check for broken gears and replace if any.
  Defective motor. Replace the PF drive motor.
  Defective PWB. Replace the PF main PWB (Refer to the service manual for the paper feeder).

• Code: 2700
• Description: TC belt motor error
  When the TC belt motor is driven, error signal is detected continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. TC belt motor and TC PWB(YC2) TC PWB and TC connect PWB(YC1) TC connect PWB and engine PWB(YC5)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the TC belt motor.
  Defective PWB. Replace the engine PWB or TC PWB or TC connect PWB check for correct operation.

• Code: 3100
• Description: ISU home position error
  ON/OFF of the HP sensor doesn’t change after a prescribed pulse passes from power supply ON.
• Causes: Defective connector cable or poor contact in the connector.
  Defective home position sensor.
  Defective ISU motor.
  Defective CCD PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Home position sensor and engine PWB (YC13)
  Defective home position sensor. Replace the home position sensor.
  Defective ISU motor. Replace the ISU motor.
  Defective CCD PWB. Replace the image scanner unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 3200
• Description: Exposure lamp error
  The input during the exposure lamp is turned on does not exceed the threshold for 5 seconds.
• Causes: Defective connector cable or poor contact of the connector.
  Defective exposure lamp.
  Defective CCD PWB.
  Defective main PWB.
• Remedy: Defective connector cable or poor contact of the connector. Reinsert the connector. Also check for continuity within the connector cable. If necessary, replace the cable. LED PWB and main PWB (YC112) CCD PWB and main PWB (YC113)
  Defective exposure lamp. Defective CCD PWB. Replace the image scanner unit.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 3500
• Description: Communication error
  A wrong read-back value.
• Causes: Defective connector cable or poor contact in the connector.
  Defective CCD PWB.
  Defective main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. CCD PWB and main PWB (YC113)
  Defective CCD PWB. Replace the image scanner unit.
  Defective main PWB. Replace the main PWB and check for correct operation.

• Code: 3600
• Description: Scanner sequence error
• Causes: Defective main PWB or engine PWB.
• Remedy: Replace the main PWB or the engine PWB and check for correct operation.

• Code: 4001
• Description: Polygon motor (K) steady-state error
  The rated speed signal detected the stability OFF continuously for 1 s after the polygon motor (K) stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit (K) and LSU connect PWB(YC5) LSU connect PWB and engine PWB (YC12)
  Defective motor. Replace the Laser scanner unit (K).
  Defective PWB. Replace the engine PWB or LSU connect PWB and check for correct operation.

• Code: 4002
• Description: Polygon motor (C) steady-state error
  The rated speed signal detected the stability OFF continuously for 1 s after the polygon motor (C) stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit (C) and LSU connect PWB(YC6) LSU connect PWB and engine PWB (YC12)
  Defective motor. Replace the Laser scanner unit (C).
  Defective PWB. Replace the engine PWB or LSU connect PWB and check for correct operation.

• Code: 4003
• Description: Polygon motor (M) steady-state error The rated speed signal detected the stability OFF continuously for 1 s after the polygon motor (M) stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit (M) and LSU connect PWB(YC7) LSU connect PWB and engine PWB (YC12)
  Defective motor. Replace the Laser scanner unit (M).
  Defective PWB. Replace the engine PWB or LSU connect PWB and check for correct operation.

• Code: 4004
• Description: Polygon motor (Y) steady-state error
  The rated speed signal detected the stability OFF continuously for 1 s after the polygon motor (Y) stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit (Y) and LSU connect PWB(YC8) LSU connect PWB and engine PWB (YC12)
  Defective motor. Replace the Laser scanner unit (Y).
  Defective PWB. Replace the engine PWB or LSU connect PWB and check for correct operation.

• Code: 4011
• Description: Polygon motor (K) startup error
  Polygon motor (K) is not stabilized within 10 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit (K) and LSU connect PWB(YC5) LSU connect PWB and engine PWB (YC12)
  Defective motor. Replace the Laser scanner unit (K).
  Defective PWB. Replace the engine PWB or LSU connect PWB and check for correct operation.

• Code: 4012
• Description: Polygon motor (C) startup error
  Polygon motor (C) is not stabilized within 10 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit (C) and LSU connect PWB(YC6) LSU connect PWB and engine PWB (YC12)
  Defective motor. Replace the Laser scanner unit (C).
  Defective PWB. Replace the engine PWB or LSU connect PWB and check for correct operation.

• Code: 4013
• Description: Polygon motor (M) startup error
  Polygon motor (M) is not stabilized within 10 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit (M) and LSU connect PWB(YC7) LSU connect PWB and engine PWB (YC12)
  Defective motor. Replace the Laser scanner unit (M).
  Defective PWB. Replace the engine PWB or LSU connect PWB and check for correct operation.

• Code: 4014
• Description: Polygon motor (Y) startup error
  Polygon motor (Y) is not stabilized within 10 s since the motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Laser scanner unit (Y) and LSU connect PWB(YC8) LSU connect PWB and engine PWB (YC12)
  Defective motor. Replace the Laser scanner unit (Y).
  Defective PWB. Replace the engine PWB or LSU connect PWB and check for correct operation.

• Code: 4101
• Description: BD initialization problem (K)
  BD is not detected within one second after the polygon motor stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective APCPWB.
  Defective BDPWB.
  Defective Main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. BDPWB and APCPWB APCPWB and LSU connect PWB (YC1) LSU connect PWB and engine PWB (YC12)
  Defective BDPWB. Defective APCPWB. Replace the Laser scanner unit (K).
  Defective Main PWB. Replace the main PWB and check for correct operation.

• Code: 4102
• Description: BD initialization problem (C)
  BD is not detected within one second after the polygon motor stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective APCPWB.
  Defective BDPWB.
  Defective Main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. BDPWB and APCPWB APCPWB and LSU connect PWB (YC2) LSU connect PWB and engine PWB (YC12)
  Defective BDPWB. Defective APCPWB. Replace the Laser scanner unit (C).
  Defective Main PWB. Replace the main PWB and check for correct operation.

• Code: 4103
• Description: BD initialization problem (M)
  BD is not detected within one second after the polygon motor stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective APCPWB.
  Defective BDPWB.
  Defective Main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. BDPWB and APCPWB APCPWB and LSU connect PWB (YC3) LSU connect PWB and engine PWB (YC12)
  Defective BDPWB. Defective APCPWB. Replace the Laser scanner unit (M).
  Defective Main PWB. Replace the main PWB and check for correct operation.

• Code: 4104
• Description: BD initialization problem (Y)
  BD is not detected within one second after the polygon motor stabilizes.
• Causes: Defective connector cable or poor contact in the connector.
  Defective APCPWB.
  Defective BDPWB.
  Defective Main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. BDPWB and APCPWB APCPWB and LSU connect PWB (YC4) LSU connect PWB and engine PWB (YC12)
  Defective BDPWB. Defective APCPWB. Replace the Laser scanner unit (M).
  Defective Main PWB. Replace the main PWB and check for correct operation.

• Code: 4600
• Description: LSU cleaning motor error
  When the LSU cleaning motor is driven, an error signal is detected continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor. Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity of the connector cable. If none, replace the cable. LSU cleaning motor and LSU connect PWB(YC11) LSU connect PWB and engine PWB(YC12)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the LSU cleaning motor.
  Defective PWB. Replace the engine PWB or LSU connect PWB check for correct operation.

• Code: 4700
• Description: VIDEO ASIC device error
  Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Defective connector cable or poor contact in the connector.
  Defective main PWB or engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Main PWB (YC105) and engine PWB (YC17)
  Defective main PWB or engine PWB. Replace the main PWB or the engine PWB and check for correct operation.

• Code: 4950
• Description: LSU CPU communication error
  A communication error is detected 10 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Main PWB and engine PWB (YC26)
  Defective PWB. Replace the main PWB or engine PWB and check for correct operation.

• Code: 6000
• Description: Broken fuser heater wire
  Fuser thermistor 2 does not reach 100° C/212 °F even after20 s during warming up. The detected temperature of fuser thermistor2 does not reach the specified temperature (ready indication temperature) for 20 s in warming up after reached to 100° C/ 212 °F.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective IH PWB.
  Fuser thermostat triggered.
  Broken fuser heater wire.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. IH coil unit and IHPWB IHPWB and engine PWB (YC7)
  Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective IH PWB. Replace the IH PWB and check for correct operation.
  Broken fuser heater wire. Fuser thermostat triggered. Reinsert the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6020
• Description: Abnormally high fuser thermistor 2 (center) temperature
  The fuser thermistor 2 detects a temperature higher than 240°C/464°F continuously for 1 s.
• Causes: Deformed connector pin.
  Shorted fuser thermistor.
  Defective engine PWB.
• Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Shorted fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6030
• Description: Fuser thermistor 2 (center) break error
  A/D value of the fuser thermistor 2 exceeds 984 bit continuously for 1 s during warming up.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective fuser thermistor
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser thermister2 and fuser PWB (YC2) Fuser unit and engine PWB (YC22)
  Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6040
• Description: NC sensor error
• Causes: Deformed connector pin.
  Shorted fuser thermistor.
  Defective engine PWB.
• Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Shorted fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6050
• Description: Abnormally low fuser thermistor 2 (center) temperature
  The fuser temperature lower than 100 °C/212 °F is detected continuously for 1 s during printing. The fuser temperature lower than 70 °C/158 °F is detected continuously for 1 s during pre-heating.
• Causes: Deformed connector pin.
  Defective fuser thermistor.
  Defective fuser heater.
  Defective engine PWB.
• Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective fuser heater. Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6120
• Description: Abnormally high fuser thermistor 3 (press roller) temperature
  The fuser temperature exceeds 200 °C/392 °F for 1 s.
• Causes: Deformed connector pin.
  Defective IH PWB.
  Defective fuser thermistor.
  Defective engine PWB.
• Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6130
• Description: Fuser thermistor 3 (press roller) break error Fuser thermistor 3 detects a temperature of -14 °C/6.8 °F . Fuser thermistor 3 does not reach 30° C/86 °F even after20 s during warming up.
• Causes: Defective connector cable or poor contact in the connector
  Deformed connector pin.
  Defective IH PWB.
  Defective fuser thermistor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser thermistor 3 and fuser PWB (YC4) Fuser unit and engine PWB (YC22)
  Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6150
• Description: Abnormally low fuser thermistor 3 (press roller) temperature
  The fuser temperature lower than 30 °C/86 °F is detected continuously for 1 s.
• Causes: Deformed connector pin.
  Defective fuser thermistor
  Defective fuser heater.
  Defective engine PWB.
• Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective fuser heater. Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6200
• Description: Broken fuser edge heater wire
  Fuser thermistor 1 does not reach 50° C/122 °F even after20 s during warming up. The detected temperature of fuser thermistor1 does not reach the specified temperature (ready indication temperature) for 20 s in warming up after reaching 50° C/122 °F.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Fuser thermostat triggered.
  Broken fuser heater wire.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. IH coil unit and IHPWB IHPWB and engine PWB (YC7)
  Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Broken fuser heater wire. Fuser thermostat triggered. Reinsert the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6220
• Description: Abnormally high fuser thermistor 1 (edge) temperature
  The fuser temperature exceeds 240 °C/464 °F for 1 s.
• Causes: Deformed connector pin.
  Defective cooling fan motor.
  Defective fuser thermistor.
  Defective engine PWB.
• Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective cooling fan motor. Replace the fuser fan motor.
  Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6230
• Description: Fuser thermistor 1 (edge) break error
  During warming up a hearter, fuser thermistor 2 detects a temperature of 100 °C/212 °F or higher and, fuser thermistor 1 detects a temperature of 37 °C/99 °F or lower.
• Causes: Defective connector cable or poor contact in the connector.
  Deformed connector pin.
  Defective fuser thermistor.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Fuser thermistor 1 and fuser PWB (YC3) Fuser unit and engine PWB (YC22)
  Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6250
• Description: Abnormally low fuser thermistor 1 (edge) temperature
  The fuser temperature lower than 100 °C/212 °F is detected continuously for 1 s during printing. The fuser temperature lower than 50 °C/122 °F is detected continuously for 1 s during pre-heating.
• Causes: Deformed connector pin.
  Defective IH PWB.
  Defective fuser thermistor.
  Defective fuser heater.
  Defective engine PWB.
• Remedy: Deformed connector pin. If the I/F connector pins of the fuser unit and the main unit are deformed owing to foreign matters, such as paper dusts, replace the connectors or the units including the connectors.
  Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective fuser heater. Defective fuser thermistor. Replace the fuser unit.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6410
• Description: Fuser unit type mismatch problem
  Absence of the fuser unit is detected.
• Causes: Fuser unit connector inserted incorrectly.
  Different type of the fuser unit is installed.
• Remedy: Fuser unit connector inserted incorrectly. Reinsert the fuser unit connector if necessary.
  Different type of the fuser unit is installed. Install the correct fuser unit.

• Code: 6600
• Description: Belt rotation error
  The belt was detected to stop for 1 s continuously during motor remote is on.
• Causes: Defective fuser motor.
  Defective IH belt.
  Defective IH PWB.
  Defective engine PWB.
• Remedy: Defective fuser motor. Replace the fuser motor.
  Defective IH belt. Replace the fuser unit.
  Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6710
• Description: CPU thermal runaway (IHPWB)
• Causes: Defective IH PWB.
• Remedy: Replace the IH PWB and check for correct operation.

• Code: 6720
• Description: Belt rotation error (IHPWB)
• Causes: Defective IH PWB.
  Defective fuser motor.
  Defective fuser unit.
• Remedy: Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective fuser motor. Replace the fuser motor.
  Defective fuser unit. Replace the fuser unit.

• Code: 6730
• Description: Abnormally high IGBT1 temperature (IHPWB)
• Causes: Defective IH PWB.
  Defective cooling fan motor.
• Remedy: Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective cooling fan motor. Replace the IH fan motor.

• Code: 6740
• Description: Abnormally high IGBT2 temperature (IHPWB)
• Causes: Defective IH PWB.
  Defective cooling fan motor.
• Remedy: Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective cooling fan motor. Replace the IH fan motor.

• Code: 6750
• Description: Abnormally output overcurrent (IHPWB)
• Causes: Defective IH PWB.
  Defective fuser unit.
• Remedy: Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective fuser unit. Replace the fuser unit.

• Code: 6760
• Description: Abnormally AC input over-current (IHPWB)
• Causes: Defective IH PWB.
• Remedy: Replace the IH PWB and check for correct operation.

• Code: 6770
• Description: Abnormally low electric power (IHPWB)
• Causes: Defective connector cable or poor contact in the connector.
  Defective IH PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable.
  Defective IH PWB. Replace the IH PWB and check for correct operation.

• Code: 6930
• Description: IH coil fan motor error
  The alarm signal was detected for 5 seconds continuously during operation.
• Causes: Defective connector cable or poor contact in the connector.
  Defective cooling fan motor.
  Defective IH PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. IH coil fan motor and engine PWB(YC21)
  Defective cooling fan motor. Replace the IH coil fan motor.
  Defective IH PWB. Replace the IH PWB and check for correct operation.

• Code: 6950
• Description: IH CPU communication error A communication error is detected 3 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective IH PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable.
  Defective IH PWB. Replace the IH PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 6990
• Description: Fuser unit type mismatch problem
  Absence of the fuser unit is detected.
• Causes: Defective IH PWB.
• Remedy: Replace the IH PWB and check for correct operation.

• Code: 7001
• Description: Toner motor K error
  When the toner motor K is driven, error signal is detected continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor K and engine PWB(YC8)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the toner motor K.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7002
• Description: Toner motor C error
  When the toner motor C is driven, error signal is detected continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor C and engine PWB(YC8)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the toner motor C.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7003
• Description: Toner motor M error
  When the toner motor M is driven, error signal is detected continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor M and engine PWB(YC8)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the toner motor M.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7004
• Description: Toner motor Y error
  When the toner motor Y is driven, error signal is detected continuously for 1 s.
• Causes: Defective connector cable or poor contact in the connector.
  Defective drive transmission system.
  Defective motor.
  Defective PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Toner motor Y and engine PWB(YC8)
  Defective drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
  Defective motor. Replace the toner motor Y.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7101
• Description: Toner sensor K error
• Causes: Defective Developer unit.
  Defective PWB.
• Remedy: Defective Developer unit. Replace the developer unit K.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7102
• Description: Toner sensor C error
• Causes: Defective Developer unit.
  Defective PWB.
• Remedy: Defective Developer unit. Replace the developer unit C.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7103
• Description: Toner sensor M error
• Causes: Defective Developer unit.
  Defective PWB.
• Remedy: Defective Developer unit. Replace the developer unit M.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7104
• Description: Toner sensor Y error
• Causes: Defective Developer unit.
  Defective PWB.
• Remedy: Defective Developer unit. Replace the developer unit Y.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7401
• Description: Developing unit K type mismatch problem
  Absence of the developing unit K is detected.
• Causes: Developing unit connector inserted incorrectly.
  Different type of the developing unit is installed.
  Defective PWB.
• Remedy: Developing unit connector inserted incorrectly. Reinsert the developing unit connector if necessary.
  Different type of the developing unit is installed. Install the correct developing unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7402
• Description: Developing unit C type mismatch problem
  Absence of the developing unit C is detected.
• Causes: Developing unit connector inserted incorrectly.
  Different type of the developing unit is installed.
  Defective PWB.
• Remedy: Developing unit connector inserted incorrectly. Reinsert the developing unit connector if necessary.
  Different type of the developing unit is installed. Install the correct developing unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7403
• Description: Developing unit M type mismatch problem
  Absence of the developing unit M is detected.
• Causes: Developing unit connector inserted incorrectly.
  Different type of the developing unit is installed.
  Defective PWB.
• Remedy: Developing unit connector inserted incorrectly. Reinsert the developing unit connector if necessary.
  Different type of the developing unit is installed. Install the correct developing unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7404
• Description: Developing unit Y type mismatch problem
  Absence of the developing unit Y is detected.
• Causes: Developing unit connector inserted incorrectly.
  Different type of the developing unit is installed.
  Defective PWB.
• Remedy: Developing unit connector inserted incorrectly. Reinsert the developing unit connector if necessary.
  Different type of the developing unit is installed. Install the correct developing unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7411
• Description: Drum unit K type mismatch problem
  Absence of the drum unit K is detected.
• Causes: Drum unit connector inserted incorrectly.
  Different type of the drum unit is installed.
  Defective PWB.
• Remedy: Drum unit connector inserted incorrectly. Reinsert the drum unit connector if necessary.
  Different type of the drum unit is installed. Install the correct drum unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7412
• Description: Drum unit C type mismatch problem
  Absence of the drum unit C is detected.
• Causes: Drum unit connector inserted incorrectly.
  Different type of the drum unit is installed.
  Defective PWB
• Remedy: Drum unit connector inserted incorrectly. Reinsert the drum unit connector if necessary.
  Different type of the drum unit is installed. Install the correct drum unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7413
• Description: Drum unit M type mismatch problem
  Absence of the drum unit M is detected.
• Causes: Drum unit connector inserted incorrectly.
  Different type of the drum unit is installed.
  Defective PWB.
• Remedy: Drum unit connector inserted incorrectly. Reinsert the drum unit connector if necessary.
  Different type of the drum unit is installed. Install the correct drum unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7414
• Description: Drum unit Y type mismatch problem Absence of the drum unit Y is detected.
• Causes: Drum unit connector inserted incorrectly.
  Different type of the drum unit is installed.
  Defective PWB.
• Remedy: Drum unit connector inserted incorrectly. Reinsert the drum unit connector if necessary.
  Different type of the drum unit is installed. Install the correct drum unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7420
• Description: Transfer belt unit type mismatch problem
  Absence of the transfer belt unit is detected.
• Causes: Transfer belt unit connector inserted incorrectly.
  Different type of the transfer belt unit is installed.
  Defective PWB.
• Remedy: Transfer belt unit connector inserted incorrectly. Reinsert the transfer belt unit connector if necessary.
  Different type of the transfer belt unit is installed. Install the correct transfer belt unit.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7601
• Description: ID sensor 1 (front) error
• Causes: Defective ID sensor.
  Defective PWB.
• Remedy: Defective ID sensor. Replace the ID sensor 1.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7602
• Description: ID sensor 2 (rear) error
• Causes: Defective ID sensor.
  Defective PWB.
• Remedy: Defective ID sensor. Replace the ID sensor 2.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7611
• Description: ID sensor (K) density error
  When ID sensor 2 detected CTD is 500 or less.
• Causes: Defective ID sensor.
  Defective PWB.
• Remedy: Defective ID sensor. Replace the ID sensor.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7612
• Description: ID sensor (C) density error
  When ID sensor 2 detected CTD is 500 or less.
• Causes: Defective ID sensor.
  Defective PWB.
• Remedy: Defective ID sensor. Replace the ID sensor.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7613
• Description: ID sensor (M) density error
  When ID sensor 2 detected CTD is 500 or less.
• Causes: Defective ID sensor.
  Defective PWB.
• Remedy: Defective ID sensor. Replace the ID sensor.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7614
• Description: ID sensor (Y) density error
  When ID sensor 2 detected CTD is 500 or less.
• Causes: Defective ID sensor.
  Defective PWB.
• Remedy: Defective ID sensor. Replace the ID sensor.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7620
• Description: ID sensor timing error
  Color registration correction was failed.
• Causes: Defective ID sensor.
  Defective PWB.
• Remedy: Defective ID sensor. Replace the ID sensor.
  Defective PWB. Replace the engine PWB check for correct operation.

• Code: 7800
• Description: Broken external thermistor wire
  The external thermistor delivers 0.3V or more.
• Causes: Defective connector cable or poor contact in the connector.
  Defective temperature sensor.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Temperature sensor and engine PWB (YC21)
  Defective temperature sensor. Replace the temperature sensor.

• Code: 7810
• Description: Short-circuited external thermistor wire external thermistor delivers 3V or more.
• Causes: Defective connector cable or poor contact in the connector.
  Defective temperature sensor.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Temperature sensor and engine PWB (YC21)
  Defective temperature sensor. Replace the temperature sensor.

• Code: 7901
• Description: Drum K EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective drum PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum unit (K) and drum connect PWB(YC5) drum connect PWB and engine connect PWB (YC4) Engine connect PWB and engine PWB (YC9)
  Defective drum PWB. Replace the drum unit K.

• Code: 7902
• Description: Drum C EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective drum PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum unit (C) and drum connect PWB(YC3) drum connect PWB and engine connect PWB (YC4) Engine connect PWB and engine PWB (YC9)
  Defective drum PWB. Replace the drum unit C.

• Code: 7903
• Description: Drum M EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective drum PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum unit (M) and drum connect PWB(YC4) drum connect PWB and engine connect PWB (YC4) Engine connect PWB and engine PWB (YC9)
  Defective drum PWB. Replace the drum unit M.

• Code: 7904
• Description: Drum Y EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective drum PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Drum unit (Y) and drum connect PWB(YC2) drum connect PWB and engine connect PWB (YC4) Engine connect PWB and engine PWB (YC9)
  Defective drum PWB. Replace the drum unit Y.

• Code: 7911
• Description: Developing unit K EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective developing PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit (K) and drum connect PWB(YC9) drum connect PWB and engine connect PWB (YC4) Engine connect PWB and engine PWB (YC12)
  Defective developing PWB. Replace the developer unit K.

• Code: 7912
• Description: Developing unit C EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective developing PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit (C) and drum connect PWB(YC7) drum connect PWB and engine connect PWB (YC4) Engine connect PWB and engine PWB (YC12)
  Defective developing PWB. Replace the developer unit C.

• Code: 7913
• Description: Developing unit M EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective developing PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit (M) and drum connect PWB(YC8) drum connect PWB and engine connect PWB (YC4) Engine connect PWB and engine PWB (YC12)
  Defective developing PWB. Replace the developer unit M.

• Code: 7914
• Description: Developing unit Y EEPROM error
  No response is issued from the device in reading/writing for 5 ms or more and this problem is repeated five times successively. Mismatch of reading data from two locations occurs eight times successively. Mismatch between writing data and reading data occurs eight times successively.
• Causes: Poor contact in the connector terminals.
  Defective developing PWB.
• Remedy: Poor contact in the connector terminals. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Developer unit (Y) and drum connect PWB(YC6) drum connect PWB and engine connect PWB (YC4) Engine connect PWB and engine PWB (YC12)
  Defective developing PWB. Replace the developer unit Y.

• Code: 8030
• Description: Tray upper limit detection problem (document finisher)
  When the tray elevation motor raises a tray, the ON status of the tray upper limit sensor is detected.
• Causes: Defective connector cable or poor contact in the connector.
  Defective tray upper limit sensor, paper surface sensor 1/2.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Tray upper limit sensor and DF main PWB (CN5) Paper surface sensor 1/2 and DF main PWB (CN6)
  Defective tray upper limit sensor, paper surface sensor 1/2. Replace the sensor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8040
• Description: Belt problem (document finisher)
  The belt sensor does not turn on/off within specified time of the belt solenoid turning on.
• Causes: Defective connector cable or poor contact in the connector.
  Defective belt sensor.
  Defective belt solenoid.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Belt sensor and DF main PWB (CN10) Belt solenoid and DF main PWB (CN21)
  Defective belt sensor. Replace the belt sensor.
  Defective belt solenoid. Replace the belt solenoid.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8140
• Description: Tray elevation motor problem (document finisher)
  The tray low limit sensor or paper surface sensor 1/2 cannot be detected to be on within 10 s since the tray elevation motor is activated.
• Causes: Defective connector cable or poor contact in the connector.
  Defective connector cable or poor contact in the connector.
  The tray elevation motor malfunctions.
  Defective tray lower limit sensor, paper surface sensor 1/2.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Tray elevation motor and DF main PWB (CN12)
  Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Tray lower limit sensor, and DF main PWB (CN5) Paper surface sensor 1/2 and DF main PWB (CN6)
  The tray elevation motor malfunctions. Replace the tray elevation motor.
  Defective tray lower limit sensor, paper surface sensor 1/2. Replace the sensor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8210
• Description: Stapler problem (document finisher)
  Jam 7012 or 7023 is indicated.
• Causes: Defective connector cable of staple or poor contact in the connector.
  The stapler is blocked with a staple.
  The stapler is broken.
  Defective DF main PWB.
• Remedy: Defective connector cable of staple or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable.
  The stapler is blocked with a staple. Remove the stapler cartridge, and check the cartridge and the stapling section of the stapler.
  The stapler is broken. Replace the stapler and check for correct operation.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8320
• Description: Adjustment motor 2 problem (document finisher)
  The adjustment sensor 2 does not turn on/off within specified time of the adjustment motor 2 turning on.
• Causes: Defective connector cable or poor contact in the connector.
  Defective adjustment sensor 2.
  Defective adjustment motor 2.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Adjustment motor 2 and DF main PWB (CN18) Adjustment sensor 2 and DF main PWB (CN7)
  Defective adjustment sensor 2. Replace the adjustment sensor 2.
  Defective adjustment motor 2. Replace the adjustment motor 2.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8330
• Description: Adjustment motor 1 problem (document finisher)
  The adjustment sensor 1 does not turn on/off within specified time of the adjustment motor 1 turning on.
• Causes: Defective connector cable or poor contact in the connector.
  Defective adjustment sensor 1.
  Defective adjustment motor 1.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Adjustment motor 1 and DF main PWB (CN18) Adjustment sensor 1 and DF main PWB (CN7)
  Defective adjustment sensor 1. Replace the adjustment sensor 1.
  Defective adjustment motor 1. Replace the adjustment motor 1.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8350
• Description: Roller motor problem (document finisher)
  The roller sensor does not turn on/off within specified time of the roller motor turning on.
• Causes: Defective connector cable or poor contact in the connector.
  Defective roller sensor.
  Defective roller motor.
  Defective DF main PWB
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Roller motor and DF main PWB (CN20) Roller sensor and DF main PWB (CN11)
  Defective roller sensor. Replace the roller sensor.
  Defective roller motor. Replace the roller motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8360
• Description: Slide motor problem (document finisher)
  The slide sensor does not turn on/off within specified time of the slide motor turning on.
• Causes: Defective connector cable or poor contact in the connector.
  Defective slide sensor.
  Defective slide motor.
  Defective DF main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Slide motor and DF main PWB (CN14) Slide sensor and DF main PWB (CN22)
  Defective slide sensor. Replace the slide sensor.
  Defective slide motor. Replace the slide motor.
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8460
• Description: EEPROM problem (document finisher)
  Reading from or writing to EEPROM cannot be performed.
• Causes: Defective EEPROM or DF main PWB.
• Remedy: Defective EEPROM or DF main PWB. Replace the DF main PWB and check for correct operation.

• Code: 8800
• Description: Document finisher communication error
  A communication error is detected 10 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective DF main PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Engine PWB (YC19) and DF relay PWB (YC2) DF relay PWB (YC3) and DF main PWB (CN1)
  Defective DF main PWB. Replace the DF main PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 8830
• Description: Bridge communication error (document finisher)
  A communication error is detected 10 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective bridge PWB.
  Defective engine PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. Engine PWB (YC19) and DF relay PWB (YC2) DF relay PWB (YC4) and bridge PWB (YC5)
  Defective bridge PWB. Replace the bridge PWB and check for correct operation.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: 8900
• Description: Backup memory data problem (document finisher)
  Read and write data does not match 3 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  EEPROM installed incorrectly.
  Defective finisher main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Check the connection of connector on the finisher main PWB and the connector of the machine, and the continuity across the connector terminals. Repair or replace if necessary.
  EEPROM installed incorrectly. Install EEPROM correctly.
  Defective finisher main PWB. Replace the finisher main PWB and check for correct operation.

• Code: 9000
• Description: Document processor communication error A communication error is detected 10 times in succession.
• Causes: Defective connector cable or poor contact in the connector.
  Defective DP main PWB.
• Remedy: Defective connector cable or poor contact in the connector. Reinsert the connector. Also check for continuity within the connector cable. If none, replace the cable. DP main PWB and engine PWB (YC18)
  Defective DP main PWB. Replace the DP main PWB and check for correct operation.

• Code: 9060
• Description: DP EEPROM error
  Mismatch between writing data and reading data occurs three times successively. Mismatch of reading data from two locations occurs three times successively.
• Causes: Defective DP main PWB.
  Device damage of EEPROM.
• Remedy: Defective DP main PWB. Replace the DP main PWB and check for correct operation.
  Device damage of EEPROM. Contact the Service Administrative Division.

• Code: 9500
• Description: BRU communication error
• Causes: IPU PWB error
• Remedy: Contact the Service Administrative Division.

• Code: 9510
• Description: BRU PWB error
• Causes: IPU PWB error
• Remedy: Contact the Service Administrative Division.

• Code: 9520
• Description: BRU PWB data error
• Causes: IPU PWB error
• Remedy: Contact the Service Administrative Division.

• Code: F000
• Description: Main PWB — operation panel PWB communication error
• Causes: Defective main PWB.
  Defective operation panel PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective operation panel PWB. Replace the operation panel PWB and check for correct operation.

• Code: F010 … F013
• Description: Main PWB checksum error
• Causes: Defective main PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.

• Code: F040
• Description: Main PWB — print engine communication error
• Causes: Defective main PWB.
  Defective engine PWB.
• Remedy: Defective main PWB. Turn the main power switch off/on to restart the machine. If the error is not resolved, replace main PWB.
  Defective engine PWB. Replace the engine PWB and check for correct operation.

• Code: F050
• Description: Print engine ROM checksum error
• Causes: Defective engine PWB.
• Remedy: Turn the main power switch off/on to restart the machine. If the error is not resolved, replace engine PWB.