Code :

Code: U2-90
Description: PCU PWB EEPROM read/write error
Causes: PCU PWB EEPROM trouble PCU PWB trouble EEPROM socket contact trouble
Remedy: Replace the PCU PWB EEPROM. Check the SIM adjustment values of the engine, and adjust again if they are improper. Replace the PCU PWB. Check contact of the EEPROM socket. Use SIM16 to cancel the trouble.

Code: U2-91
Description: PCU PWB EEPROM check sum error
Causes: PCU PWB EEPROM trouble PCU PWB trouble EEPROM socket contact trouble
Remedy: Replace the PCU PWB EEPROM. Replace the PCU PWB. Check contact of the EEPROM socket. Use SIM16 to cancel the trouble. (The check sum error detection data are calculated again to reset the proper check sum data.)

Code: U5-00
Description: Document feed unit communication error
Causes: Connector, harness connection trouble. SCU PWB trouble. DSPF PWB trouble.
Remedy: Turn OFF/ON the power. Check connection of the connector and the harness. Replace the SCU PWB. Replace the DSPF PWB.

Code: U5-16
Description: Document feed unit fan trouble
Causes: When the fan is operated, the fan operation signal is not detected within the specified time. Fan motor trouble. Connector, harness connection trouble. DSPF PWB trouble.
Remedy: Use SIM2-3 to check that the fan is rotating. Replace the fan motor. Check connection of the connector and the harness. Replace the DSPF PWB.

Code: U5-30
Description: Document feed unit tray lift up trouble
Causes: STUD does not turn ON 5 times continuously within the specified time. STUD/STLD sensor trouble. Connection trouble of the connector and the harness. DSPF PWB trouble.
Remedy: Replace the STUD/STLD sensor. Check connection of the connector and the harness. Replace the DSPF PWB.

Code: U5-31
Description: Document feed unit tray lift down trouble
Causes: STLD does not turn OFF within the specified time. STUD/STLD sensor trouble. Connection trouble of the connector and the harness. DSPF PWB trouble.
Remedy: Replace the STUD/STLD sensor. Check connection of the connector and the harness. Replace the DSPF PWB.

Code: U6-09
Description: LCC lift motor trouble
No variation in the motor rotation sensor signal (encoder sign) is detected within the specified time after booting or stopping the LCC lift motor
Causes: LCC lift motor rotation sensor trouble LCC control PWB trouble LCC lift mechanism trouble LCC lift motor trouble
Remedy: Use SIM4-2 and 4-3 to check the operation of the LCC sensor and the lift motor. Check the LCC lift motor rotation sensor, and replace if necessary. Check the LCC control PWB, and replace if necessary. Check the LCC lift mechanism, and repair if necessary. Check the LCC lift motor, and replace if necessary. Use SIM15 to cancel the trouble.

Code: U6-20
Description: LCC control PWB - PCU PWB communication error
Causes: Communication error between the LCC control PWB and the PCU PWB. Connection trouble of the harness and the connector between the machine and the LCC and those of the LCC control PWB. LCC control PWB trouble PCU PWB trouble Malfunction due to noises
Remedy: Check to confirm the LCC model. Check the connection of the harness and the connector between the machine and the LCC and those of the LCC control PWB, and replace if necessary. Check the LCC control PWB, and replace if necessary. Check the PCU PWB, and replace if necessary.