• Code: U2-81
• Description: SCU PWB EEPROM check sum error
• Causes: SCU PWB EEPROM trouble. Installation of non-initialized EEPROM. SCU PWB trouble. EEPROM socket contact trouble.
• Remedy: Replace the SCU PWB EEPROM. Replace the SCU PWB. Check contact of the EEPROM socket. Put down the counter/adjustment values in the simulation to prevent against loss of the counter data and the adjustment values. Use SIM16 to cancel the trouble.

• Code: U2-90
• Description: PCU PWB EEPROM read/write error
• Causes: PCU PWB EEPROM trouble. Installation of non-initialized EEPROM. PCU PWB trouble EEPROM socket contact trouble.
• Remedy: Replace the PCU PWB EEPROM. Replace the PCU PWB. Check contact of the EEPROM socket. Put down the counter/adjustment values in the simulation to prevent against loss of the counter data and the adjustment values. Use SIM16 to cancel the trouble.

• Code: U2-91
• Description: PCU PWB EEPROM check sum error
• Causes: PCU PWB EEPROM trouble. Installation of non-initialized EEPROM. PCU PWB trouble EEPROM socket contact trouble.
• Remedy: Replace the PCU PWB EEPROM. Replace the PCU PWB. Check contact of the EEPROM socket. Put down the counter/adjustment values in the simulation to prevent against loss of the counter data and the adjustment values. Use SIM16 to cancel the trouble.

• 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: When STUD is not turned ON 5 times continuously within the specified time. STUD/STLD sensor trouble. Connection trouble of the connector and the harness. Replace the DSPF PWB.
• 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. Replace the DSPF PWB.
• Remedy: Replace the STUD/STLD sensor. Check connection of the connector and the harness. Replace the DSPF PWB.

• Code: U5-40
• Description: Document feed unit installation trouble
• Causes: When two or more document feed units are detected. Connection trouble of the connector and the harness. Document feeder trouble.
• Remedy: Check connection of the connector and the harness.