Causes: Mismatch between ROM and PCU MAIN PWB (mismatch in signal levels)
Remedy: Case 1 Trouble position/ cause ROM trouble/Improper ROM insertion Remedy (Check) (Repair) Replace the PCU MAIN PWB ROM. (After work) Case 2 Trouble position/ cause PCU MAIN PWB trouble Remedy (Check) (Repair) Replace the PCU MAIN PWB. / Power OFFON (After work) Reenter the set values and the adjustment values.
Code: C1 10
Description: Main charger trouble (BLACK)
Causes: "In warm-up, the image density sensor detects the transfer belt surface and its output exceeds the specified level."
Remedy: Case 1 Trouble position / cause Main charger output trouble (Toner is attached to the transfer drum due to an abnormal output of the main charger in warm-up.) Remedy (Check) "Main charger contact check / Main charger unit check / High voltage PWB, high voltage interface PWB check / Main charger output voltage check" (Repair) "Main charger unit replacement / High power PWB, high voltage interface PWB replacement / Main charger output voltage adjustment (SIM 8-2)" / Power Source-ON (After-work) Execute image density correction (SIM 44-6). / Execute half tone density correction (SIM 44-26). Note Case 2 Trouble position/cause Image density sensor trouble Remedy (Check) "Image density sensor check (dirt, output) / Image density sensor calibration plate check / Image density sensor calibration plate switch operation check" (Repair) "Image density sensor cleaning, replacement / Image density sensor calibration plate cleaning, replacement / Image density sensor calibration plate switch solenoid replacement" / Power Source-ON (After-work) Execute ADJ M6. Note Case 3 Trouble position/cause "Transfer belt trouble (dirt, scratches)" Remedy (Check) "Toner dispersion from transfer belt cleaner, OPC drum unit, developing unit" (Repair) "Transfer belt cleaning, replacement / Transfer belt cleaner replacement / OPC drum unit, developing unit cleaning" / Power Source-ON (After-work) Note Case 4 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) PCU MAIN PWB replacement / Power Source-ON (After-work) Re-enter the setup values and adjustment values. (Install the EEPROM of the defective PCU MAIN PWB to a new PCU MAIN PWB.) Note Case 5 Trouble position/cause PCU SUB PWB trouble Remedy (Check) Check the PCU SUB PWB image density sensor circuit. (Repair) PCU SUB PWB replacement / Power Source-ON
Code: C1 11
Description: Main charger trouble (CYAN)
Causes: "In warm-up, the image density sensor detects the transfer belt surface and its output exceeds the specified level. "
Remedy: Case 1 Trouble position/cause Main charger output trouble (Toner is attached to the transfer drum due to an abnormal output of the main charger in warm-up.) Remedy (Check) "Main charger contact check / Main charger unit check / High voltage PWB, high voltage interface PWB check / Main charger output voltage check" (Repair) "Main charger unit replacement / High power PWB, high voltage interface PWB replacement / Main charger output voltage adjustment (SIM 8-2)" / Power Source-ON (After-work) Execute image density correction (SIM 44-6). / Execute half tone density correction (SIM 44-26). Note Case 2 Trouble position/cause Image density sensor trouble Remedy (Check) "Image density sensor check (dirt, output) / Image density sensor calibration plate check / Image density sensor calibration plate switch operation check" (Repair) "Image density sensor cleaning, replacement / Image density sensor calibration plate cleaning, replacement / Image density sensor calibration plate switch solenoid replacement" / Power Source-ON (After-work) Execute ADJ M6 Case 3 Trouble position/cause "Transfer belt trouble (dirt, scratches)" Remedy (Check) "Toner dispersion from transfer belt cleaner, OPC drum unit, developing unit" (Repair) "Transfer belt cleaning, replacement / Transfer belt cleaner replacement / OPC drum unit, developing unit cleaning" / Power Source-ON (After-work) Note Case 4 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) PCU MAIN PWB replacement / Power Source-ON (After-work) Re-enter the setup values and adjustment values. (Install the EEPROM of the defective PCU MAIN PWB to a new PCU MAIN PWB.) Note Case 5 Trouble position/cause PCU SUB PWB trouble Remedy (Check) Check the PCU SUB PWB image density sensor circuit. (Repair) PCU SUB PWB replacement / Power Source-ON
Code: C1 12
Description: Main charger trouble (MAGENTA)
Causes: "In warm-up, the image density sensor detects the transfer belt surface and its output exceeds the specified level. "
Remedy: Case 1 Trouble position/cause Main charger output trouble (Toner is attached to the transfer drum due to an abnormal output of the main charger in warm-up.) Remedy (Check) "Main charger contact check / Main charger unit check / High voltage PWB, high voltage interface PWB check / Main charger output voltage check" (Repair) "Main charger unit replacement / High power PWB, high voltage interface PWB replacement / Main charger output voltage adjustment (SIM 8-2)" / Power Source-ON (After-work) Execute image density correction (SIM 44-6). / Execute half tone density correction (SIM 44-26). Note Case 2 Trouble position/cause Image density sensor trouble Remedy (Check) "Image density sensor check (dirt, output) / Image density sensor calibration plate check / Image density sensor calibration plate switch operation check" (Repair) "Image density sensor cleaning, replacement / Image density sensor calibration plate cleaning, replacement / Image density sensor calibration plate switch solenoid replacement" / Power Source-ON (After-work) Execute ADJ M6. Note Case 3 Trouble position/cause "Transfer belt trouble (dirt, scratches)" Remedy (Check) "Toner dispersion from transfer belt cleaner, OPC drum unit, developing unit" (Repair) "Transfer belt cleaning, replacement / Transfer belt cleaner replacement / OPC drum unit, developing unit cleaning" / Power Source-ON (After-work) Note Case 4 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) PCU MAIN PWB replacement / Power Source-ON (After-work) Re-enter the setup values and adjustment values. (Install the EEPROM of the defective PCU MAIN PWB to a new PCU MAIN PWB.) Note Case 5 Trouble position/cause PCU SUB PWB trouble Remedy (Check) Check the PCU SUB PWB image density sensor circuit. (Repair) PCU SUB PWB replacement / Power Source-ON
Code: C1 13
Description: Main charger trouble (YELLOW)
Causes: "In warm-up, the image density sensor detects the transfer belt surface and its output exceeds the specified level. "
Remedy: Case 1 Trouble position/cause Main charger output trouble (Toner is attached to the transfer drum due to an abnormal output of the main charger in warm-up.) Remedy (Check) "Main charger contact check / Main charger unit check / High voltage PWB, high voltage interface PWB check / Main charger output voltage check" (Repair) "Main charger unit replacement / High power PWB, high voltage interface PWB replacement / Main charger output voltage adjustment (SIM 8-2)" / Power Source-ON (After-work) Execute image density correction (SIM 44-6). / Execute half tone density correction (SIM 44-26). Note Case 2 Trouble position/cause Image density sensor trouble Remedy (Check) "Image density sensor check (dirt, output) / Image density sensor calibration plate check / Image density sensor calibration plate switch operation check" (Repair) "Image density sensor cleaning, replacement / Image density sensor calibration plate cleaning, replacement / Image density sensor calibration plate switch solenoid replacement" / Power Source-ON (After-work) Execute ADJ M6. Note Case 3 Trouble position/cause "Transfer belt trouble (dirt, scratches)" Remedy (Check) "Toner dispersion from transfer belt cleaner, OPC drum unit, developing unit" (Repair) "Transfer belt cleaning, replacement / Transfer belt cleaner replacement / OPC drum unit, developing unit cleaning" / Power Source-ON (After-work) Note Case 4 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) PCU MAIN PWB replacement / Power Source-ON (After-work) Re-enter the setup values and adjustment values. (Install the EEPROM of the defective PCU MAIN PWB to a new PCU MAIN PWB.) Note Case 5 Trouble position/cause PCU SUB PWB trouble Remedy (Check) Check the PCU SUB PWB image density sensor circuit. (Repair) PCU SUB PWB replacement / Power Source-ON
Code: E7 1
Description: Image data memory trouble
Causes: "When checking the ICU image data memory (Tandem memory), the memory capacity is judged as less than the specified capacity (128MB)."
Remedy: Case 1 Trouble position/cause Tandem memory and its peripheral circuit trouble (ICU MAIN PWB trouble) Remedy (Check) Check read/write operation of Tandem memory. (SIM 60-1) (Repair) Replace the ICU MAIN PWB. / Power Source-ON (After-work) Adjust ADJM9/M10/M12/M13/M14/M15/M17. / Re-enter setup values and adjustment values. (Install the EEPROOM of the defective ICU MAIN PWB to a new ICU MAIN PWB.)