• Code: U6-00
• Description: PCU PWB - Desk paper feed unit communication error
• Causes: Error when testing the communication line after turning ON the power or canceling the simulation. Connector, harness connection trouble. Desk control PWB trouble. PCU PWB trouble Strong external noises.
• Remedy: Turn OFF/ON the power to cancel. Check the connector and the harness in the communication line. Replace the desk control PWB. Replace the PCU PWB.

• Code: U6-01
• Description: Desk paper feed tray 1 lift trouble
• Causes: D1ULD does not turn ON within the specified time when lift-up operation. D1ULD sensor trouble. Desk control PWB trouble. Lift unit trouble. Connection trouble of the connector and the harness. PCU PWB trouble
• Remedy: Replace the D1ULD sensor. Replace the desk control PWB. Replace the lift unit. Harness and connector connection trouble. Replace the PCU PWB.

• Code: U6-02
• Description: Desk paper feed tray 2 lift trouble
• Causes: D2ULD does not turn ON within the specified time when lift-up operation. D2ULD sensor trouble. Desk control PWB trouble. Lift unit trouble. Connection trouble of the connector and the harness. PCU PWB trouble
• Remedy: Replace the D2ULD sensor. Replace the desk control PWB. Replace the lift unit. Harness and connector connection trouble. Replace the PCU PWB.

• Code: U6-03
• Description: Desk paper feed tray 3 lift trouble
• Causes: The D3ULD sensor is not turned ON within the specified time during lift-up operation. D3ULD sensor trouble. Desk control PWB trouble. Lift unit trouble. Connection trouble of the connector and the harness. PCU PWB trouble.
• Remedy: Replace the D3ULD sensor. Replace the desk control PWB. Replace the lift unit. Check connection of the connector and the harness. Replace the PCU PWB.

• Code: U6-10
• Description: Desk paper feed unit paper transport motor trouble
• Causes: Desk paper feed motor trouble (motor lock, motor rpm abnormality, over-current to the motor). Desk control PWB trouble. Connection trouble of the connector and the harness.
• Remedy: Use SIM4-3 to check the operation of the desk transport motor. Replace the desk control PWB. Replace the desk paper feed motor. Harness and connector connection trouble.

• Code: U6-50
• Description: Desk - Main unit combination trouble
• Causes: Improper combination between the main unit and the desk. Desk control PWB trouble.
• Remedy: Install a desk which is proper for the main unit mode. Replace the desk control PWB.