• Code: E7 30
• Description: ICU PWB FLASH ROM trouble
• Causes: "After turning ON the power, consistency of the ICU MAIN PWB and the ROM (FLASH ROM) is checked and no consistency is found."
• Remedy: Case 1 Trouble position/cause ICUMAIN PWB trouble / ICU MAIN PWB ROM(FLASH ROM) trouble Remedy (Check) Check whether the installed ICU MAIN PWB or the ICU FLASH ROM is of the other model (AR-C100/150). (Repair) Replace the ICUMAIN PWB. / Replace the ICU MAIN PWB ROM(FLASH ROM). / Power Source-ON (After-work) Adjust ADJM9/M10/M12/M13/M14/M15/M17. / Re-enter setup values and adjustment values. (Install the EEPROM of the defective ICU MAIN PWB to a new ICU MAIN PWB.)

• Code: E7 90
• Description: ICUMAIN PWB - PCU MAIN PWB communication trouble (PCU side detection)
• Causes: Caused by line noise on the data line (Hardware trouble)
• Remedy: Case 1 Trouble position/cause PCUMAIN PWB / ICU MAIN PWB signal line connection trouble Remedy (Check) Check connection of the signal line between the PCUMAIN PWB and the ICU MAIN PWB. (Repair) Repair or replace the cable and the connector between the PCUMAIN PWB and the ICU MAIN PWB. / Power Source-ON (After-work) Note Case 2 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) Replace the PCU MAIN PWB. / Power Source-ON (After-work) Re-enter setup values and adjustment values. (Install the EEPROM of the defective PCU MAIN PWB to a new PCU MAIN PWB.) Note Case 3 Trouble position/cause ICU MAIN PWB trouble Remedy (Check) (Repair) ICUMAIN PWB / Power Source-ON (After-work) Adjust ADJM9/M10/M12/M13/M14/M15/M17. / Re-enter setup values and adjustment values. (Install the EEPROM of the defective ICU MAIN PWB to a new ICU MAIN PWB.)

• Code: E8 0
• Description: ICUMAIN PWB - PCU MAIN PWB communication trouble (PCU side detection)
• Causes: No response from ICU PWB for PCU PWB command (Caused by Hardware trouble)
• Remedy: Case 1 Trouble position/cause PCUMAIN PWB / ICU MAIN PWB signal line connection trouble Remedy (Check) Check connection of the signal line between the PCUMAIN PWB and the ICU MAIN PWB. (Repair) Repair or replace the cable and the connector between the PCUMAIN PWB and the ICU MAIN PWB. / Power Source-ON (After-work) Note Case 2 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) Replace the PCU MAIN PWB. / Power Source-ON (After-work) Re-enter setup values and adjustment values. (Install the EEPROM of the defective PCU MAIN PWB to a new PCU MAIN PWB.) Note Case 3 Trouble position/cause ICU MAIN PWB trouble Remedy (Check) (Repair) ICUMAIN PWB / Power Source-ON (After-work) Adjust ADJM9/M10/M12/M13/M14/M15/M17. / Re-enter setup values and adjustment values. (Install the EEPROM of the defective ICU MAIN PWB to a new ICU MAIN PWB.)

• Code: E8 1
• Description: ICUMAIN PWB - PCU MAIN PWB communication trouble (PCU side detection)
• Causes: No response from ICU PWB for PCU PWB command (Caused by software trouble)
• Remedy: Case 1 Trouble position/cause PCUMAIN PWB / ICU MAIN PWB signal line connection trouble Remedy (Check) Check connection of the signal line between the PCUMAIN PWB and the ICU MAIN PWB. (Repair) Repair or replace the cable and the connector between the PCUMAIN PWB and the ICU MAIN PWB. / Power Source-ON (After-work) Note Case 2 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) Replace the PCU MAIN PWB. / Power Source-ON (After-work) Re-enter setup values and adjustment values. (Install the EEPROM of the defective PCU MAIN PWB to a new PCU MAIN PWB.) Note Case 3 Trouble position/cause ICU MAIN PWB trouble Remedy (Check) (Repair) ICUMAIN PWB / Power Source-ON (After-work) Adjust ADJM9/M10/M12/M13/M14/M15/M17. / Re-enter setup values and adjustment values. (Install the EEPROM of the defective ICU MAIN PWB to a new ICU MAIN PWB.)

• Code: EE EL
• Description: Toner concentration reference control level setup trouble (Overtoner)
• Causes: "When setting the toner concentration reference control level , the toner concentration sensor output is not within the specified range. (The output level is 77 or less.)"
• Remedy: Case 1 Trouble position/cause Toner density sensor trouble / Toner density sensor signal line connection trouble Remedy (Check) Check the toner concentration output level with SIM 25-1. (Repair) Toner concentration sensor replacement (Developing unit replacement) / Power Source-ON (After-work) Execute ADJ M3. Note Case 2 Trouble position/cause Process control PWB trouble Remedy (Check) (Repair) Process control PWB replacement / Power Source-ON Case 3 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.)

• Code: EE EU
• Description: Toner concentration reference control level setup trouble (Undertoner)
• Causes: "When setting the toner concentration reference control level , the toner concentration sensor output is not within the specified range. (The output level is179 or above.)"
• Remedy: Case 1 Trouble position/cause Toner density sensor trouble / Toner density sensor signal line connection trouble Remedy (Check) Check the toner concentration output level with SIM 25-1. (Repair) Toner concentration sensor replacement (Developing unit replacement) / Power Source-ON (After-work) Execute ADJ M3. Note Case 2 Trouble position/cause Process control PWB trouble Remedy (Check) Check the toner concentration sensor output level with SIM 25-1. (Repair) Process control PWB replacement / Power Source-ON (After-work) Note Case 3 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) Check the toner concentration sensor output level with SIM 25-1. (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.)

• Code: F1 70
• Description: PCU PWB - sorter control PWB communication trouble (PCU detection)
• Causes: Communication test error after turning ON the power or canceling a simulation.
• Remedy: Case 1 Trouble position/cause PCU MAIN PWB - Sorter signal line connection trouble Remedy (Check) Check connection of the signal line between the PCU MAIN PWB and the sorter. (Repair) Repair or replace the cable and the connector between the PCUMAIN PWB and the ICU MAIN PWB. / Power Source-ON (After-work) Note Case 2 Trouble position/cause Sorter control PWB trouble Remedy (Check) (Repair) Replace the sorter control PWB. / Power Source-ON (After-work) Note Case 3 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) Replace the PCU MAIN PWB. / Power Source-ON (After-work) Re-enter setup values and adjustment values. (Install the EEPROM of the defective PCU MAIN PWB to a new PCU MAIN PWB.)

• Code: F1 80
• Description: Sorter power abnormality (Sorter side detection)
• Causes: Sorter control PWB +24V power abnormality (Low voltage)
• Remedy: Case 1 Trouble position/cause Bad connection between the DC main PWB and the sorter control PWB. Remedy (Check) Check connection between the DC main PWB and the sorter control PWB. (Repair) Repair or replace the harness and the connector between the DC main PWB and the sorter control PWB. / Power Source-ON (After-work) Note Case 2 Trouble position/cause Sorter control PWB trouble Remedy (Check) Check the power source in the sorter control PWB. (SIM 3-2) (Repair) Replace the sorter control PWB. / Power Source-ON