• Code: U2-60
• Description: Water Mark check error
• Causes: Watermark data trouble
• Remedy: Use SIM49-5 to upload the watermark data.

• Code: U2-80
• Description: SCU PWB EEPROM read/write error
• Causes: SCU PWB EEPROM trouble. 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: U2-81
• 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 motor trouble
• Causes: Fan motor trouble. Connection trouble of the connector and the harness.
• Remedy: Use SIM2-3 to check the operation. Check the DSPF PWB and the driver PWB connection of the connector and the harness.

• 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.