[SOLVED] Quick fix Konica-Minolta C3850 list error codes

[SOLVED] Quick fix Konica-Minolta C3850 list error codes

– Compatible Printer model: Konica-Minolta bizhub C3850
– Konica-Minolta bizhub C3850 Error Codes with quick guides:

• Code: 0103
• Description: Tray 2 PC transport motor malfunction
  The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning.
• Causes: • PC transport motor (M51) • Printer control board (PRCB) • PC control board (PCCB)
• Troubleshooting Guides: 1 Check the connector between M51-PCCB PJ3 for proper connection and correct as necessary. – – 2 Check the connector between PCCB PJ1-relay CN153-PRCB CN7 for proper connection and correct as necessary. – – 3 Check the connector of M51 for proper drive coupling and correct as necessary. – – 4 M51 operation check PCCB PJ3-4 to 8 2-L 5 Replace M51 – – 6 Replace PCCB – – 7 Replace PRCB

• Code: 0106
• Description: Tray 3 PC transport motor malfunction
  The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning.
• Causes: • PC transport motor (M51) • Printer control board (PRCB) • PC control board (PCCB)
• Troubleshooting Guides: 1 Check the connector between M51-PCCB PJ3 for proper connection and correct as necessary. – – 2 Check the connector between PCCB PJ1-relay CN154-PCCB PJ2 for proper connection and correct as necessary. – – 3 Check the connector between PCCB PJ1-relay CN153-PRCB CN7 for proper connection and correct as necessary. – – 4 Check the connector of M51 for proper drive coupling and correct as necessary. – – 5 M51 operation check PCCB PJ3-4 to 8 2-L 6 Replace M51 – – 7 Replace PCCB – – 8 Replace PRCB

• Code: 2152
• Description: 1st transfer pressure/retraction malfunction
  • The 1st transfer pressure sensor (PS9) does not change its state from one corresponding to the retracted position to the pressed position within a predetermined period of time after the 1st transfer pressure solenoid (SD1) has been energized. • The 1st transfer pressure sensor (PS9) does not change its state from one corresponding to the pressed position to the retracted position within a predetermined period of time after the 1st transfer pressure solenoid (SD1) has been energized.
• Causes: • Main motor (M1) • 1st transfer pressure sensor (PS9) • 1st transfer pressure solenoid (SD1) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between M1-PRCB CN9 for proper connection and correct as necessary. – – 2 Check the connector of M1 for proper drive coupling and correct as necessary. – – 3 Check the connector between PS9- PRCB CN12 for proper connection and correct as necessary. – – 4 Check the connector between SD1-relay CN85-PRCB CN12 for proper connection and correct as necessary. – – 5 PS9 I/O check, sensor check PRCB CN12-3 (ON) 15-C to D 6 SD1 operation check PRCB CN12-12 (REM) 15-E 7 M1 operation check PRCB CN9-3 to 6 15-B 8 Replace M1 – – 9 PRCB F4 conduction check – – 10 Replace PRCB

• Code: 2202
• Description: Developing motor malfunction
  • The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning. • The motor does not reach its steady rotating state even after the lapse of a predetermined period of time after it has been started.
• Causes: • Developing motor (M3) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between M3-PRCB CN8 for proper connection and correct as necessary. – – 2 Check the M3 connector for proper drive coupling and correct as necessary. – – 3 M3 operation check PRCB CN8-3 to 6 7-J

• Code: 2253
• Description: Color PC motor malfunction
  • The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning. • The motor does not reach its steady rotating state even after the lapse of a predetermined period of time after it has been started.
• Causes: • Color PC motor (M4) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between M4-PRCB CN8 for proper connection and correct as necessary. – – 2 Check the M4 connector for proper drive coupling and correct as necessary. – – 3 M4 operation check PRCB CN8-10 to 13 7-J 4 Replace M4 – – 5 PRCB F7 conduction check – – 6 Replace PRCB

• Code: 2351
• Description: Toner suction fan motor malfunction
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
• Causes: • Toner suction fan motor (FM3) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connectors between FM3-relay CN301- PRCB CN3 for proper connection, and correct as necessary. – – 2 Check the fan for possible overload and correct as necessary. – – 3 FM3 operation check PRCB CN3-1 (OUT) PRCB CN3-3 (LOCK) 7-K 4 Replace FM3 – – 5 PRCB F2 conduction check – – 6 Replace PRCB

• Code: 2411
• Description: Imaging unit/C new article release
  The status with the new unit is not cleared after the new imaging unit is set.
• Causes: • Imaging unit/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2412
• Description: Imaging unit/M new article release
  The status with the new unit is not cleared after the new imaging unit is set.
• Causes: • Imaging unit/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2413
• Description: Imaging unit/Y new article release
  The status with the new unit is not cleared after the new imaging unit is set.
• Causes: • Imaging unit/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2414
• Description: Imaging unit/K new article release
  The status with the new unit is not cleared after the new imaging unit is set.
• Causes: • Imaging unit/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2551
• Description: Abnormally low toner density detected cyan TCR sensor
  When sampling data is determined in TC ratio calculation control, TCR sensor output is lower than a predetermined value for a predetermined number of times in a row even though there is toner in the toner cartridge.
• Causes: • Imaging unit/C,M,Y,K • Toner supply motor/YM (M5) • Toner supply motor/CK (M6) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Perform image troubleshooting procedure if image density is low. – – 2 Reinstall the imaging unit – – 3 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 4 M5, M6 operation check PRCB CN22-1 to 4 (M5) PRCB CN22-5 to 8 (M6) 7-I 7-K 5 Replace the imaging unit – – 6 PRCB F5 conduction check – – 7 Replace PRCB

• Code: 2552
• Description: Abnormally high toner density detected cyan TCR sensor
  TC ratio in the imaging unit, which is determined by toner replenishing amount control mechanism, is a predetermined value or more for a given number of times consecutively
• Causes: • Imaging unit/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2553
• Description: Abnormally low toner density detected magenta TCR sensor
  When sampling data is determined in TC ratio calculation control, TCR sensor output is lower than a predetermined value for a predetermined number of times in a row even though there is toner in the toner cartridge.
• Causes: • Imaging unit/C,M,Y,K • Toner supply motor/YM (M5) • Toner supply motor/CK (M6) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Perform image troubleshooting procedure if image density is low. – – 2 Reinstall the imaging unit – – 3 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 4 M5, M6 operation check PRCB CN22-1 to 4 (M5) PRCB CN22-5 to 8 (M6) 7-I 7-K 5 Replace the imaging unit – – 6 PRCB F5 conduction check – – 7 Replace PRCB

• Code: 2554
• Description: Abnormally high toner density detected magenta TCR sensor
  TC ratio in the imaging unit, which is determined by toner replenishing amount control mechanism, is a predetermined value or more for a given number of times consecutively
• Causes: • Imaging unit/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2555
• Description: Abnormally low toner density detected yellow TCR sensor
  When sampling data is determined in TC ratio calculation control, TCR sensor output is lower than a predetermined value for a predetermined number of times in a row even though there is toner in the toner cartridge.
• Causes: • Imaging unit/C,M,Y,K • Toner supply motor/YM (M5) • Toner supply motor/CK (M6) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Perform image troubleshooting procedure if image density is low. – – 2 Reinstall the imaging unit – – 3 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 4 M5, M6 operation check PRCB CN22-1 to 4 (M5) PRCB CN22-5 to 8 (M6) 7-I 7-K 5 Replace the imaging unit – – 6 PRCB F5 conduction check – – 7 Replace PRCB

• Code: 2556
• Description: Abnormally high toner density detected yellow TCR sensor
  TC ratio in the imaging unit, which is determined by toner replenishing amount control mechanism, is a predetermined value or more for a given number of times consecutively
• Causes: • Imaging unit/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2557
• Description: Abnormally low toner density detected black TCR sensor
  When sampling data is determined in TC ratio calculation control, TCR sensor output is lower than a predetermined value for a predetermined number of times in a row even though there is toner in the toner cartridge.
• Causes: • Imaging unit/C,M,Y,K • Toner supply motor/YM (M5) • Toner supply motor/CK (M6) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Perform image troubleshooting procedure if image density is low. – – 2 Reinstall the imaging unit – – 3 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 4 M5, M6 operation check PRCB CN22-1 to 4 (M5) PRCB CN22-5 to 8 (M6) 7-I 7-K 5 Replace the imaging unit – – 6 PRCB F5 conduction check – – 7 Replace PRCB

• Code: 2558
• Description: Abnormally high toner density detected black TCR sensor
  TC ratio in the imaging unit, which is determined by toner replenishing amount control mechanism, is a predetermined value or more for a given number of times consecutively
• Causes: • Imaging unit/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2559
• Description: Cyan TCR sensor adjustment failure
  TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Imaging unit/Y,M,C,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 255A
• Description: Magenta TCR sensor adjustment failure
  TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Imaging unit/Y,M,C,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 255B
• Description: Yellow TCR sensor adjustment failure
  TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Imaging unit/Y,M,C,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 255C
• Description: Black TCR sensor adjustment failure
  TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Imaging unit/Y,M,C,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2561
• Description: Cyan TCR sensor failure
  TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Imaging unit/Y,M,C,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2562
• Description: Magenta TCR sensor failure
  TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Imaging unit/Y,M,C,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2563
• Description: Yellow TCR sensor failure
  TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Imaging unit/Y,M,C,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2564
• Description: Black TCR sensor failure
  TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
• Causes: • Imaging unit/Y,M,C,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reinstall imaging unit – – 2 Check the connector between imaging unit-PRCB CN18, CN19 for proper connection and correct as necessary. – – 3 Replace the imaging unit – – 4 Replace PRCB

• Code: 2650
• Description: Main backup media access error
  • When an error is detected at the data reading process. • The re-written data, which has been read out, checked and founded as error, is read out again and found as error. • The error was found when reading out the counter value.
• Causes: • MFP board (MFPB) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the harness from MFPB to PRCB for proper connection and correct as necessary. – – 2 Replace MFPB – – 3 Replace PRCB – – 1. Check that the trouble code “4802” appears and then display service mode. 2. Touch [Engine Data Backup]. 3. Touch [Engine Data Backup]. 4. Touch [Engine Data Reflect Mode], and touch [OK]. 5. Check that the result “OK” appears. 6. Turn OFF the main power switch and turn it ON again more than 10 seconds after. 7. Update the PRCB firmware. 8. Make the specified readjustments. 4 If the above actions do not solve the problem, contact KM.

• Code: 2A21
• Description: Toner cartridge/C new release failure
  The status with the new cartridge is not cleared after the new toner cartridge is set.
• Causes: • Toner cartridge/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between toner cartridge-relay CN79-EXCB CN4 for proper connection and correct as necessary. – – 2 Clean the connection between the toner cartridge and the machine if dirty. – – 3 Reinstall the toner cartridge 4 Check the harness for proper connection and correct as necessary. – – 5 Check the connector between EXCB CN2-PRCB CN11 for proper connection and correct as necessary. – – 6 Replace the toner cartridge – – 7 Replace PRCB

• Code: 2A22
• Description: Toner cartridge/M new release failure
  The status with the new cartridge is not cleared after the new toner cartridge is set.
• Causes: • Toner cartridge/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between toner cartridge-relay CN79-EXCB CN4 for proper connection and correct as necessary. – – 2 Clean the connection between the toner cartridge and the machine if dirty. – – 3 Reinstall the toner cartridge 4 Check the harness for proper connection and correct as necessary. – – 5 Check the connector between EXCB CN2-PRCB CN11 for proper connection and correct as necessary. – – 6 Replace the toner cartridge – – 7 Replace PRCB

• Code: 2A23
• Description: Toner cartridge/Y new release failure
  The status with the new cartridge is not cleared after the new toner cartridge is set.
• Causes: • Toner cartridge/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between toner cartridge-relay CN79-EXCB CN4 for proper connection and correct as necessary. – – 2 Clean the connection between the toner cartridge and the machine if dirty. – – 3 Reinstall the toner cartridge 4 Check the harness for proper connection and correct as necessary. – – 5 Check the connector between EXCB CN2-PRCB CN11 for proper connection and correct as necessary. – – 6 Replace the toner cartridge – – 7 Replace PRCB

• Code: 2A24
• Description: Toner cartridge/K new release failure
  The status with the new cartridge is not cleared after the new toner cartridge is set.
• Causes: • Toner cartridge/C,M,Y,K • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between toner cartridge-relay CN79-EXCB CN4 for proper connection and correct as necessary. – – 2 Clean the connection between the toner cartridge and the machine if dirty. – – 3 Reinstall the toner cartridge 4 Check the harness for proper connection and correct as necessary. – – 5 Check the connector between EXCB CN2-PRCB CN11 for proper connection and correct as necessary. – – 6 Replace the toner cartridge – – 7 Replace PRCB

• Code: 3201
• Description: Fusing motor malfunction
  The motor lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• Causes: • Fusing motor (M2) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between M2-PRCB CN9 for proper connection and correct as necessary. – – 2 Check the loading status of the fusing unit drive, and correct the error as necessary. – – 3 M2 operation check PRCB CN9-9 to 12 15-C 4 Replace M2 – – 5 PRCB F9 conduction check – – 6 Replace PRCB

• Code: 3302
• Description: Paper cooling fan motor malfunction
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
• Causes: • Paper cooling fan motor (FM4) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between FM8-relay CN82-PRCB CN12 for proper connection and correct as necessary. – – 2 Check the fan for possible overload and correct as necessary. – – 3 FM4 operation check PRCB CN12-4 (OUT) PRCB CN12-6 (LOCK) 15-D 4 Replace FM4 – – 5 PRCB F2 conduction check – – 6 Replace PRCB

• Code: 3421
• Description: Fusing temperature increase malfunction (Main of the heating side)
  • Detected temperature of the fusing temperature sensor/1 (TEM1: main of the heating side) does not go up a given range of temperature even after a lapse of given period of time at warm up. • The warm-up is not completed even after the set period of time has elapsed after the warm-up is started.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: main of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the right door. – – 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct as necessary. – – 4 Replace the fusing unit – – 5 Replace PRCB – – 6 Replace DCPS

• Code: 3426
• Description: Fusing temperature increase malfunction (Center of the heating side)
  • Detected temperature of the fusing temperature sensor/1 (TEM1: main of the heating side) does not go up a given range of temperature even after a lapse of given period of time at warm up. • The warm-up is not completed even after the set period of time has elapsed after the warm-up is started.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: center of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the right door. – – 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct as necessary. – – 4 Replace the fusing unit – – 5 Replace PRCB – – 6 Replace DCPS

• Code: 3721
• Description: Fusing abnormally high temperature (Main of the heating side)
  Detected temperature of the fusing temperature sensor/1 (TEM1: main of the heating side) goes beyond a given temperature for a given period of time consecutively.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: main of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the right door. – – 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

• Code: 3722
• Description: Fusing abnormally high temperature (Edge of the heating side)
  Detected temperature of the fusing temperature sensor/2 (TEM2) goes beyond a given temperature for a given period of time consecutively.
• Causes: • Fusing unit • Fusing temperature sensor/2 (TEM2) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the right door. – – 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

• Code: 3726
• Description: Fusing abnormally high temperature (Center of the heating side)
  Detected temperature of the fusing temperature sensor/1 (TEM1: center of the heating side) goes beyond a given temperature for a given period of time consecutively.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: center of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the right door. – – 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

• Code: 3821
• Description: Fusing abnormally low temperature (Main of the heating roller)
  The fusing temperature sensor/1 (TEM1: main of the heating side) continues to detect a temperature lower than a predetermined one for a predetermined period of time after warm-up is complete.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: main of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the upper right door. – – 3 Check the fusing unit -PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

• Code: 3822
• Description: Fusing abnormally low temperature (Edge of the heating roller)
  The fusing temperature sensor/2 (TEM2) continues to detect a temperature lower than a predetermined one for a predetermined period of time after warm-up is complete.
• Causes: • Fusing unit • Fusing temperature sensor/2 (TEM2) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the upper right door. – – 3 Check the fusing unit -PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

• Code: 3826
• Description: Fusing abnormally low temperature (Center of the heating roller)
  The fusing temperature sensor/1 (TEM1: center of the heating side) continues to detect a temperature lower than a predetermined one for a predetermined period of time after warm-up is complete.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: center of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the upper right door. – – 3 Check the fusing unit -PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

• Code: 3921
• Description: Fusing sensor wire breaks abnormality (Center of the heating roller)
  After a predetermined period of time after the warm-up stage is started, the fusing temperature sensor/1 (TEM1: main of the heating side) voltage does not increase by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: main of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the upper right door. – – 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

Solve Konica-Minolta bizhub C3850 Error codes

• Code: 3922
• Description: Fusing sensor wire breaks abnormality (Edge of the heating roller)
  After a predetermined period of time after the warm-up stage is started, the fusing temperature sensor/2 (TEM2) voltage does not decrease by predetermined steps (temperature rise) within a predetermined period of time.
• Causes: • Fusing unit • Fusing temperature sensor/2 (TEM2) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the upper right door. – – 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

• Code: 3926
• Description: Fusing sensor wire breaks abnormality (Middle of the heating roller)
  After a predetermined period of time after the warm-up stage is started, the fusing temperature sensor/1 (TEM1: center of the heating side) voltage does not decrease by predetermined steps (temperature rise) within a predetermined time.
• Causes: • Fusing unit • Fusing temperature sensor/1 (TEM1: center of the heating side) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the open/close operation of the upper right door. – – 3 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary. – – 4 Replace the fusing unit – – 5 Replace DCPS – – 6 Replace PRCB

• Code: 4002
• Description: LD control communication error
  When the LD control board (PHRYB) is receiving data, a communication error is detected.
• Causes: • PH unit • LD control board (LDCB) • Printer control board (PRCB)ly (
• Troubleshooting Guides: 1 Check the connector between PH unit-relay CN73- PRCB CN5 for proper connection and correct as necessary. – – 2 Replace the PH unit – – 3 Replace PRCB

• Code: 4091
• Description: Engine communication error
  • The engine resends the maximum number of retries (five times) after a retry sequence has occurred. • Communication with the CTL is interrupted for one min. or longer during a stabilization sequence.
• Causes: • MFP board (MFPB) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reboot the machine. – – 2 Check the flat cable between MFPB CN16C-PRCB CN4 for proper connection and correct as necessary. – – 3 Check the connected portion of the flat cable for any curled pattern or any scratches, and replace it if necessary. – – 4 Replace MFPB – – 5 Replace PRCB

• Code: 4092
• Description: I/F communication error (CNT detection)
  The communication between the MFPB and PRCB can not be completed even when elapsed a given period of time.
• Causes: • MFP board (MFPB) • Printer control board (PRCB)ntrol
• Troubleshooting Guides: 1 Reboot the machine. – – 2 Check the flat cable between MFPB CN16C-PRCB CN4 for proper connection and correct as necessary. – – 3 Check the connected portion of the flat cable for any curled pattern or any scratches, and replace it if necessary. – – 4 Replace MFPB 5 Replace PRCB

• Code: 4101
• Description: Polygon motor malfunction
  • The polygon motor fails to turn stably even after the lapse of a given period of time after activating and changing rotation speed the polygon motor. • Motor lock signal detects HIGH for a given period time consecutively during the polygon motor is rotating.
• Causes: • PH unit • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between PH unit- relay CN72- PRCB CN6 for proper connection and correct as necessary. – – 2 Replace the PH unit – – 3 PRCB F3 conduction check – – 4 Replace PRCB

• Code: 4501
• Description: Laser malfunction
  • SOS signal is not detected even after the lapse of a given period of time after starting the laser output. • SOS signal is not detected for a given period of time during printing.
• Causes: • PH unit • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between PH unit-relay CN73- PRCB CN5 for proper connection and correct as necessary. – – 2 Replace the PH unit – – 3 Replace PRCB

• Code: 4801
• Description: Main unit board failure
  A faulty combination of the printer control board (PRCB) and the MFP board (MFPB) is detected.
• Causes: • MFP board (MFPB) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Reboot the machine. – – 2 Replace MFPB – – 3 Replace PRCB

• Code: 4802
• Description: Main unit backup data miscompare
  The replacement of the printer control board is detected.
• Causes: Printer control board (PRCB)
• Troubleshooting Guides: 1 1. Call the Service mode to the screen. 2. Touch [Security Service Mode]. 3. Touch [Engine Data Backup]. 4. Touch [Engine Data Reflect Mode], and touch [OK]. 5. Check that the result “OK” appears. 6. Turn OFF the main power switch and turn it ON again more than 10 seconds after. – – 2 Update the firmware. – – 3 If the above actions do not solve the problem, contact KM.

• Code: 4901
• Description: FW/OS integrity verification error
  • NG results from verification of the hash value of the controller FW. • Faulty, damaged, or illegally written ROM data
• Causes: • MFP board (MFPB) • SSD board (SSDB)
• Troubleshooting Guides: 1 Reboot the machine. – – 2 Update the firmware. – – 3 Check the MFPB for proper connection and correct as necessary. – – 4 Check the SSDB for proper connection and correct as necessary. 5 Replace SSD 6 Replace MFPB

• Code: 5102
• Description: Main motor failure
  The motor lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• Causes: • Main motor (M1) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between M1-PRCB CN9 for proper connection and correct as necessary. – – 2 M1 operation check PRCB CN9-3 to 6 15-B 3 Replace M1 – – 4 PRCB F9 conduction check – – 5 Replace PRCB

• Code: 5307
• Description: UFP fan motor failure
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
• Causes: • UFP fan motor (FM5) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between FM5-relay CN158-relay CN90-PRCB CN13 for proper connection and correct as necessary. – – 2 Check the fan for possible overload and correct as necessary. – – 3 FM5 operation check EXCB CN13-1 (OUT) EXCB CN13-3 (LOCK) 15-F 4 Replace FM5 – – 5 PRCB F2 conduction check – – 6 Replace PRCB

• Code: 5351
• Description: DC power supply fan motor failure
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
• Causes: • DC power supply fan motor (FM1) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between FM1-relay CN304- PRCB CN3 for proper connection and correct as necessary. – – 2 Check the fan for possible overload and correct as necessary. – – 3 FM1 operation check PRCB CN3-10 (OUT) PRCB CN3-12 (LOCK) 7-L 4 Replace FM1 – – 5 PRCB F2 conduction check – – 6 Replace PRCB

• Code: 5353
• Description: Cooling fan motor/2 failure
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
• Causes: • Cooling fan motor/2 (FM6)ning. • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between FM6-relay CN302- PRCB CN3 for proper connection and correct as necessary. – – 2 Check the fan for possible overload and correct as necessary. – – 3 FM6 operation check PRCB CN3-4 (OUT) PRCB CN3-6 (LOCK) 7-K 4 Replace FM6 – – 5 PRCB F2 conduction check – – 6 Replace PRCB

• Code: 5357
• Description: Cooling fan motor/1 failurening.
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
• Causes: • Cooling fan motor/1 (FM2) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between FM2-relay CN303- PRCB CN3 for proper connection and correct as necessary. – – 2 Check the fan for possible overload and correct as necessary. – – 3 FM2 operation check PRCB CN3-7 (OUT) PRCB CN3-9 (LOCK) 7-L 4 Replace FM2 – – 5 PRCB F2 conduction check – – 6 Replace PRCB

• Code: 5501
• Description: AC signal abnormality
  The zero cross signal is not input during fusing phase control.
• Causes: • Fusing unit • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the fusing unit for correct installation (whether it is secured in position). – – 2 Check the fusing unit-PRCB CN15, DCPS CN2 for proper connection and correct or change as necessary – – 3 Replace fusing unit – – 4 Replace PRCB – – 5 Replace DCPS

• Code: 5601
• Description: Engine control malfunction
  Engine control malfunction is detected with port monitor control.
• Causes: Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connectors on the PRCB for proper connection and correct or change as necessary. – – 2 Rewrite the firmware. – – 3 Replace PRCB

• Code: 5701
• Description: Power supply malfunction
  A condition is detected in which no power is being supplied to the printer control board (PRCB).
• Causes: • PH unit • Toner supply motor/YM (M5) • Toner supply motor/CK (M6) • Front door switch (SW2) • Right door switch (SW3) • DC power supply (DCPS) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connector between SW2, SW3-DCPS CN10 for proper connection and correct as necessary. – – 2 Check the connector between M5, M6-PRCB CN22 for proper connection and correct as necessary. – – 3 Check the connector between PH unit-relay CN73- PRCB CN5 for proper connection and correct as necessary. – – 4 M5, M6 operation check PRCB CN22-1 to 4 (M5) PRCB CN22-5 to 8 (M6) 7-I 7-K 5 SW2, SW3 operation check DCPS CN10-1 to 3 1-F 6 Replace the PH unit – – 7 Replace DCPS – – 8 PRCB F5, F10 conduction check – – 9 Replace PRCB

• Code: 6751
• Description: CCD clamp/gain adjustment failure
  During the CCD gain adjustment, a condition in which the peak value of the output data is equal to, or less than, 64 occurs three consecutive times during retries.
• Causes: • Scanner unit • MFP board (MFPB)
• Troubleshooting Guides: 1 Check the connector between scanner unit-MFPB CN102, CN103 for proper connection and correct as necessary. – – 2 Check for possible extraneous light and correct as necessary. – – 3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty. – – 4 Correct reflective mirror of the scanner if faulty, or change scanner mirror. – – 5 Replace scanner unit – – 6 Replace MFPB

• Code: 6790
• Description: AFE offset adjustment error
  During the offset adjustment, the offset value does not fall within the predetermined range a total of three times including retries.
• Causes: • Scanner unit • MFP board (MFPB)
• Troubleshooting Guides: 1 Check the connector between scanner unit-MFPB CN102, CN103 for proper connection and correct as necessary. – – 2 Check for possible extraneous light and correct as necessary. – – 3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty. – – 4 Correct reflective mirror of the scanner if faulty, or change scanner mirror. – – 5 Replace scanner unit – – 6 Replace MFPB

• Code: 6791
• Description: AFE register setting error
  There is a mismatch between the set default values of the AFE gain/offset and the gain/offset values read thereafter.
• Causes: • Scanner unit • MFP board (MFPB)
• Troubleshooting Guides: 1 Check the connector between scanner unit-MFPB CN102, CN103 for proper connection and correct as necessary. – – 2 Check for possible extraneous light and correct as necessary. – – 3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty. – – 4 Correct reflective mirror of the scanner if faulty, or change scanner mirror. – – 5 Replace scanner unit – – 6 Replace MFPB

• Code: 6792
• Description: White reference plate search error
  The black/white edge on the shading plate cannot be detected during initialization.
• Causes: • Scanner unit • MFP board (MFPB)
• Troubleshooting Guides: 1 Check the connector between scanner unit-MFPB CN102, CN103 for proper connection and correct as necessary. – – 2 Check for possible extraneous light and correct as necessary. – – 3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty. – – 4 Correct reflective mirror of the scanner if faulty, or change scanner mirror. – – 5 Replace scanner unit – – 6 Replace MFPB

• Code: 6793
• Description: Scanner communication error
  A communication error of some sort occurs between the controller and the scanner.
• Causes: • Scanner unit • MFP board (MFPB)
• Troubleshooting Guides: 1 Check the connector between scanner unit-MFPB CN102, CN103 for proper connection and correct as necessary. – – 2 Check for possible extraneous light and correct as necessary. – – 3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty. – – 4 Correct reflective mirror of the scanner if faulty, or change scanner mirror. – – 5 Replace scanner unit – – 6 Replace MFPB

• Code: 9401
• Description: Exposure lamp lighting failure detected
  The intensity of the lamp is not stabilized within a predetermined period of time during the lamp stabilization check process in a lamp warm-up cycle.
• Causes: • Scanner unit • MFP board (MFPB)
• Troubleshooting Guides: 1 Check the connector between scanner unit-MFPB CN102, CN103 for proper connection and correct as necessary. – – 2 Check for possible extraneous light and correct as necessary. – – 3 Clean the lens, mirrors, CCD surface, and shading sheet if dirty. – – 4 Correct reflective mirror of the scanner if faulty, or change scanner mirror. – – 5 Replace scanner unit – – 6 MFPB F102, F105 conduction check – – 7 Replace MFPB

• Code: C151
• Description: ROM contents error upon startup (MSC)
  A fault is detected in a sequence of ROM contents check of the MFPB during starting.
• Causes: MFP board (MFPB)
• Troubleshooting Guides: 1 Check the ROM version. – – 2 Rewrite the firmware. – – 3 Replace MFPB

• Code: C15C
• Description: Engine Flash ROM writing error
  A flash ROM writing sequence is interrupted in its mid-operation due to, for example, power being shut off.
• Causes: Printer control board (PRCB)
• Troubleshooting Guides: 1 Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more after connect the power cord, and turn ON the main power switch. 2 Rewrite the firmware. – – 3 Replace PRCB

• Code: C15D
• Description: Engine Flash ROM device error
  An erase error or other device fault occurs during flash ROM writing.
• Causes: Printer control board (PRCB)
• Troubleshooting Guides: 1 Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more after connect the power cord, and turn ON the main power switch. 2 Rewrite the firmware. – – 3 Replace PRCB

• Code: C15E
• Description: Engine FW download communication fault
  Irregular data is received during FW downloading.
• Causes: • MFP board (MFPB) • Printer control board (PRCB)
• Troubleshooting Guides: 1 Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more after connect the power cord, and turn ON the main power switch. – – 2 Rewrite the firmware. – – 3 Replace MFPB – – 4 Replace PRCB

• Code: C161
• Description: Firmware update error
  A firmware updating sequence is not normally terminated.
• Causes: MFP board (MFPB)
• Troubleshooting Guides: 1 Check the cable used for updating the firmware for proper connection and correct any faulty connection as necessary. – – 2 Check the firmware updating file; if the file is not correct, update the firmware again. – – 3 Check the firmware updating procedure; if the procedure is not correct, update the firmware again. 4 Update the firmware again. 5 Check the MFPB connector for proper connection and correct any faulty connection as necessary. 6 Replace MFPB

• Code: C163
• Description: Faulty destination
  • The wrong model of firmware is detected in the engine during the initial connection to the engine is being checked. • Hardware signal is not fixed when the Boot started.
• Causes: Printer control board (PRCB)
• Troubleshooting Guides: 1 Rewrite the firmware. – – 2 Replace PRCB – – 1. Turn OFF the main power switch and replace the current PRCB with a new one. 2. Update the PRCB firmware. 3. After completing the firmware update, turn OFF and ON the main power switch and check to see that warm-up is started. 4. When the trouble cannot be solved, reinstall the removed PRCB to the original board. NOTE • When taking the above steps, check whether PRCB is defective or not without replacing the MFPB. 3 If the above actions do not solve the problem, contact KM.

• Code: C164
• Description: ROM contents error (MSC)
  The wrong model of firmware is detected in the MFP board when the main power switch is turned ON.
• Causes: • Printer control board (PRCB) • MFP board (MFPB)
• Troubleshooting Guides:

• Code: D004
• Description: Hard disk access error (connection failure)
  Unable to communicate between the hard disk and MFP board (MFPB).
• Causes: • MFP board (MFPB) • Hard disk
• Troubleshooting Guides: 1 Check the ROM version. – – 2 Rewrite the firmware. – – 3 Replace the corresponding board. – – 4 If the above actions do not solve the problem, contact KM.

• Code: D091
• Description: Hard disk full error
  The area made available as a user area is full during access to the hard disk.
• Causes: • MFP board (MFPB) • Hard disk
• Troubleshooting Guides: 1 Delete jobs saved using [Document Print/ Delete] to thereby increase the portion of the user area available for use. – – 2 Check the hard disk connector MFPB CN5 and CN13 for proper connection and correct any faulty connection as necessary. – – 3 Using [Administrator Settings] -> [Security Settings] -> [HDD Settings] -> [HDD Format], format the HDD. – – 4 Replace the hard disk. – – 5 Replace MFPB.

• Code: D092
• Description: No hard disk (found during a disk check)
  The hard disk is not mounted.sk
• Causes: Hard disk
• Troubleshooting Guides: 1 Install and format the hard disk.

• Code: D093
• Description: Wrong hard disk (found during a disk check)
  • A hard disk intended for another model is mounted. • The hard disk capacity is short.
• Causes: • MFP board (MFPB) • Hard disk
• Troubleshooting Guides: 1 Replace the hard disk. – – 2 Format hard disk.

• Code: D094
• Description: Hard disk check disk error
  HDD is damaged.
• Causes: Hard disk
• Troubleshooting Guides: 1 Replace the hard disk. – – 2 Format hard disk.

• Code: D095
• Description: Hard disk recovered (requiring reboot)
  HDD is damaged.
• Causes: Hard disk
• Troubleshooting Guides: 1 Turn OFF/ON the main power switch. – – 2 If the above actions do not solve the problem, contact KM.

• Code: D096
• Description: Hard disk access fault
  HDD is damaged.
• Causes: Hard disk
• Troubleshooting Guides: 1 Replace the hard disk. – – 2 Format hard disk.

• Code: D3A0, D3A2
• Description: Counter error
  A write error occurs in the counter area.
• Causes: MFP board (MFPB)
• Troubleshooting Guides: 1 Check the MFPB for its mounting condition and correct any faulty condition. – – 2 Replace MFPB – – 3 If the same trouble code persists after the abovementioned procedures, the EEPROM is probably damaged.

• Code: D3F1
• Description: Successful completion of counter backup
  The counter backup process is completed successfully.
• Causes:
• Troubleshooting Guides: 1 This code is displayed when the counter backup process is completed successfully. When this code is displayed, turn OFF/ON the power switch and then perform the given steps. G.4.3.2 MFP board (MFPB)

• Code: D3F4
• Description: Abnormal end of counter backup
  The counter backup process results in an abnormal end due to a write error or other reasons.
• Causes: MFP board (MFPB)
• Troubleshooting Guides: 1 Reboot the main body. – – 2 Check the MFPB connector for proper connection and correct as necessary. – – 3 Change MFPB. – – 4 After taking the above actions, if the counter backup process results in the same trouble code again, the EEPROM can be broken. In this case, the counter backup is unavailable.

• Code: D501
• Description: FLASH error
  The SSD board (SSDB) develops a fault.
• Causes: • MFP board (MFPB) • SSD board (SSDB)
• Troubleshooting Guides: 1 Check the SSD for its mounting condition and correct any faulty condition. – – 2 Replace MFPB

• Code: DC00
• Description: EEPROM fault 1
  Printer control board (PRCB)
• Causes: Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connectors on the PRCB for proper connection and correct any faulty connection as necessary. – – 2 Replace PRCB

• Code: DC10
• Description: EEPROM fault 2
• Causes: Printer control board (PRCB)
• Troubleshooting Guides: 1 Check the connectors on the PRCB for proper connection and correct any faulty connection as necessary. – – 2 Replace PRCB

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