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Code: U2 21
Description:
Counter (EEPROM) check sum error (ICU MAIN PWB)
Causes:
Counter data area check sum error
Remedy:
Case 1 Trouble position/cause EEPROM trouble Remedy (Check) (Repair) Replace the EEPROM. / SIM 16 (After-work) Note Case 2 Trouble position/cause ICU MAIN PWB trouble Remedy (Check) (Repair) ICU MAIN PWB replacement / SIM 16 (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: U2 22
Description:
Setup, adjustment value (EEPROM) check sum error (ICU MAIN PWB)
Causes:
Setup/adjustment data area check sum error
Remedy:
Case 1 Trouble position/cause EEPROM trouble Remedy (Check) (Repair) Replace the EEPROM. / SIM 16 (After-work) Note Case 2 Trouble position/cause ICU MAIN PWB trouble Remedy (Check) (Repair) ICUMAIN PWB replacement / SIM 16 (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: U2 30
Description:
Manufacturing No. data (ICU MAIN PWB / PCU MAIN PWB) discrepancy
Causes:
The serial No. data stored in the ICU MAIN PWB (EEPROM) and that in the PCU MAIN PWB (EEPROM) do not coincide.
Remedy:
Case 1 Trouble position/cause "When replacing the ICU MAIN PWB or the PCU MAIN PWB, the serial No. data is not entered." Remedy (Check) (Repair) Enter the correct serial No. data to the ICU MAIN PWB and the PCU MAIN PWB (EEPROM) (SIM 29-1/2). / SIM 16
Code: U4 0
Description:
PCU MAIN PWB - ADU communication trouble
Causes:
Communication test error in warm-up
Remedy:
Case 1 Trouble position/cause Bad connection of the signal line between the PCU MAIN PWB and the ADU control PWB. Remedy (Check) Check connection of the signal line between the PCU MAIN PWB and the ADU control PWB. (Repair) Repair or replace the cable and the connector between the PCU MAIN PWB and the ADU control PWB. / Power Source-ON 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 ADU control PWB trouble Remedy (Check) (Repair) ADU control PWB replacement / Power Source-ON
Code: U4 12
Description:
ADU transport motor trouble
Causes:
"The motor rotation sensor (RE) signal cycle becomes 50msec or more after 1sec from turning ON the ADU transport motor. / The motor rotation sensor (RE) signal is detected more than 100 times during 100msec after 5sec from turning OFF the ADU transport motor."
Remedy:
Case 1 Trouble position/cause Duplex transport motor trouble Remedy (Check) Check the duplex transport motor operation. (SIM9-1/2/4) (Repair) Replace the duplex transport motor. / Power Source-ON (After-work) Note Case 2 Trouble position/cause Duplex transport motor rotation sensor (DMRE) trouble Remedy (Check) Duplex transport motor rotation sensor (DMRE) operation check (SIM 9-1/2/4) (Repair) Replace the duplex transport motor rotation sensor (DMRE). / Power Source-ON (After-work) Note Case 3 Trouble position/cause Duplex mechanism section trouble Remedy (Check) Duplex mechanism section operation check (SIM9-1/2/4) (Repair) Repair or replace the duplex mechanism section. / Power Source-ON (After-work) Note Case 4 Trouble position/cause ADU control PWB trouble Remedy (Check) (Repair) ADU control PWB replacement / Power Source-ON
Code: U4 2
Description:
ADU alignment plate operation trouble
Causes:
The home position sensor (DPhpS) detects the home position sensor for 1sec or more after starting separating operation of the alignment plate from the home position. / The home position is not detected within 5sec after starting returning operation to the home position.
Remedy:
Case 1 Trouble position/cause Alignment home position sensor (DPhpS) trouble Remedy (Check) Check the alignment home position sensor (DPhpS) operation. (SIM9-1/2/4) (Repair) Replace the alignment home position sensor (DPhpS). / Power Source-ON (After-work) Note Case 2 Trouble position/cause Duplex alignment motor trouble. Remedy (Check) Check the duplex alignment motor operation. (SIM9-1/2/4) (Repair) Replace the duplex alignment motor. / Power Source-ON (After-work) Note Case 3 Trouble position/cause Duplex mechanism section trouble Remedy (Check) Check the duplex mechanism section operation. (SIM9-1/2/4) (Repair) Repair or replace the duplex mechanism section. / Power Source-ON (After-work) Note Case 4 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 5 Trouble position/cause ADU control PWB trouble Remedy (Check) (Repair) ADU control PWB replacement / Power Source-ON
Code: U5 0
Description:
PCU MAIN PWB - RADF communication trouble
Causes:
Communication test error in warm-up
Remedy:
Case 1 Trouble position/cause Bad connection of the signal line between the PCU MAIN PWB and the RADF control PWB. Remedy (Check) Check connection of the signal line between the PCU MAIN PWB and the RADF control PWB. (Repair) Repair or replace the cable and the connector between the PCU MAIN PWB and the RADF control 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 RADF control PWB trouble Remedy (Check) (Repair) RADF control PWB replacement / Power Source-ON
Code: U5 1
Description:
RADF resist sensor trouble
Causes:
RADF resist sensor detection trouble
Remedy:
Case 1 Trouble position/cause RADF resist sensor trouble Remedy (Check) Check operation of the RADF resist sensor. (SIM 2-2) (Repair) Replace the RADF resist sensor. / Power Source-ON Case 2 Trouble position/cause RADF control PWB trouble Remedy (Check) (Repair) RADF control PWB replacement / Power Source-ON
Code: U5 11
Description:
RADF paper feed motor trouble
Causes:
RADF paper feed motor lock / Motor rpm abnormality / Overcurrent to the motor
Remedy:
Case 1 Trouble position/cause RADF paper feed motor trouble Remedy (Check) Check the RADF paper feed motor operation. (SIM2-1/2/3) (Repair) Replace the RADF paper feed motor. / Power Source-ON (After-work) Note Case 2 Trouble position/cause RADF control PWB trouble Remedy (Check) (Repair) RADF control PWB replacement / Power Source-ON

Code: U5 2
Description:
RADF exit sensor trouble
Causes:
RADF paper exit sensor detection trouble
Remedy:
Case 1 Trouble position/cause RADF paper exit sensor trouble Remedy (Check) Check the RADF paper exit sensor operation. (SIM 2-2) (Repair) Replace the RADF paper exit sensor. / Power Source-ON (After-work) Note Case 2 Trouble position/cause RADF control PWB trouble Remedy (Check) (Repair) RADF control PWB replacement / Power Source-ON
Code: U5 3
Description:
RADF timing sensor trouble
Causes:
RADF timing sensor detection trouble
Remedy:
Case 1 Trouble position/cause RADF timing sensor trouble Remedy (Check) Check the RADF timing sensor operation. (SIM 2-2) (Repair) Replace the RADF timing sensor. / Power Source-ON (After-work) Note Case 2 Trouble position/cause RADF control PWB trouble Remedy (Check) (Repair) RADF control PWB replacement / Power Source-ON
Code: U6 20
Description:
PCU MAIN PWB- Large capacity tray (LCC) communication trouble
Causes:
Communication test error in warm-up
Remedy:
Case 1 Trouble position/cause Bad connection of the signal line between the PCU MAIN PWB and the large capacity tray (LCC) control PWB Remedy (Check) Check connection of the signal line between the PCU MAIN PWB and the large capacity tray (LCC) control PWB. (Repair) Repair or replace the cable and the connector between the PCU MAIN PWB and the large capacity tray (LCC) control 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 Large capacity tray (LCC) control PWB trouble Remedy (Check) (Repair) Large capacity tray (LCC) control PWB replacement / Power Source-ON
Code: U6 21
Description:
Large capacity tray (LCC) transport motor trouble
Causes:
The rotation sensor output signal does not change when the transport motor is turned ON. / The rotation sensor output signal changes after turning OFF the transport motor.
Remedy:
Case 1 Trouble position/cause Transport motor trouble Remedy (Check) Check the transport motor operation. (SIM 4-3) (Repair) Replace the transport motor. / Power Source-ON (After-work) Note Case 2 Trouble position/cause Transport mechanism section trouble Remedy (Check) Check the transport mechanism section operation. (SIM 4-3) (Repair) Repair or replace the transport mechanism section. / Power Source-ON (After-work) Note Case 3 Trouble position/cause Large capacity tray (LCC) control PWB trouble Remedy (Check) (Repair) Large capacity tray (LCC) control PWB replacement / Power Source-ON
Code: U6 22
Description:
Large capacity tray (LCC) 24V power trouble
Causes:
DC24V power is not supplied to the large capacity tray (LCC).
Remedy:
Case 1 Trouble position/cause Bad connection between the DC MAIN power PWB and the large capacity tray (LCC) Remedy (Check) "Check connection between the fuse (F708), the DC MAIN power PWB and the large capacity tray (LCC)." (Repair) Replace the fuse (F708). Repair or replace the wire and the connector between the DC MAIN power PWB and the large capacity tray (LCC) control PWB. / Power Source-ON (After-work) Note Case 2 Trouble position/cause Large capacity tray (LCC) control PWB trouble Remedy (Check) (Repair) Large capacity tray (LCC) control PWB replacement / Power Source-ON
Code: U6 9
Description:
Large capacity tray (LCC) lift motor trouble
Causes:
The rotation sensor output signal does not change when the lift motor is turned ON. / The rotation sensor output signal changes after turning OFF the lift motor.
Remedy:
Case 1 Trouble position/cause Lift motor rotation sensor trouble Remedy (Check) Check the lift motor rotation sensor operation. (Repair) Replace the lift motor rotation sensor. / SIM 15 (After-work) Note Case 2 Trouble position/cause "Lift mechanism (motor, etc.) trouble" Remedy (Check) "Check the lift mechanism (motor, etc.) operation. (SIM4-3)" (Repair) Replace the lift unit (lift motor). / SIM 15 (After-work) Note Case 3 Trouble position/cause Large capacity tray (LCC) control PWB trouble Remedy (Check) (Repair) Replace the large capacity tray (LCC) control PWB. / SIM 15 (After-work) Note Case 4 Trouble position/cause PCU MAIN PWB trouble Remedy (Check) (Repair) Replace the PCU MAIN PWB. / SIM 15 (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: U7 0
Description:
RIC communication trouble
Causes:
Communication test error in warm-up
Remedy:
Case 1 Trouble position/cause Bad connection of the signal line between the PCU MAIN PWB and the RIC I/F. Remedy (Check) Check connection of the signal line between the PCU MAIN PWB and the RIC I/F. (Repair) Repair or replace the cable and the connector between the PCU MAIN PWB and the RIC I/F / 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.)
Code: UC 0
Description:
ICU SCAN PWB -CPT PWB communication trouble
Causes:
ICU SCAN PWB / CPT PWB
Remedy:
Case 1 Trouble position/cause CPT PWB trouble Remedy (Check) CPT PWB connector check (Repair) CPT PWB replacement / Power Source-ON (After-work) Note Case 2 Trouble position/cause ICU SCAN PWB trouble Remedy (Check) ICU SCAN PWB connector check (Repair) ICU SCAN PWB replacement / Power Source-ON
Code: UC 1
Description:
CPT board program trouble
Causes:
CPT PWB program hung up
Remedy:
Case 1 Trouble position/cause CPT PWB trouble Remedy (Check) "If the trouble cannot be canceled by turning ON/OFF the power repeatedly, replace the CPT PWB.." (Repair) CPT PWB replacement / Power Source-ON
Code: UC 2
Description:
CPT board ASIC trouble
Causes:
Gate array abnormality on the CPT PWB
Remedy:
Case 1 Trouble position/cause CPT PWB trouble Remedy (Check) "If the trouble cannot be canceled by turning ON/OFF the power repeatedly, replace the CPT PWB.." (Repair) CPT PWB replacement / Power Source-ON
Code: UC 3
Description:
CPT board ROM trouble
Causes:
CPT PWB ROM abnormality
Remedy:
Case 1 Trouble position/cause CPT PWB trouble Remedy (Check) (Repair) CPT PWB replacement / Power Source-ON
Code: UC 4
Description:
CPT board RAM trouble
Causes:
CPT PWB RAM abnormality
Remedy:
Case 1 Trouble position/cause CPT PWB trouble Remedy (Check) (Repair) CPT PWB replacement / Power Source-ON
Code: UC 5
Description:
CPT board model code data trouble
Causes:
The model code data sent from the CPU PWB to the ICU SCAN PWB is abnormal.
Remedy:
Case 1 Trouble position/cause CPT PWB trouble Remedy (Check) (Repair) CPT PWB replacement / Power Source-ON

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