• Code: U5 00
• Description: ADF communication trouble
• Causes: Communication test error when turning on the power or after canceling the exclusive simulation. Communication error with the ADF
• Remedy: Case 1 Cause Improper connection or disconnection of the connector and the harness Check & Remedy Check the connector and the harness in the communication line. Turn OFF/ON the power to cancel the error. Case 2 Cause ADF control PWB trouble, control PWB (MFP) trouble, malfunction caused by noises Check & Remedy Check the ADF control PWB and the control PWB (MFP). Turn OFF/ON the power to cancel the error.

• Code: U5 01
• Description: ADF resist sensor trouble
• Causes: ADF resist sensor detection trouble
• Remedy: Case 1 Cause Sensor trouble Check & Remedy Use SIM 2-2 to check the resist sensor detection. Case 2 Cause Disconnection of the harness in the ADF. Check & Remedy Check the harness in the ADF. Case 3 Cause ADF control PWB trouble Check & Remedy Replace the ADF control PWB.

• Code: U5 02
• Description: ADF repulsion sensor trouble
• Causes: ADF paper feed/reverse sensor detection trouble
• Remedy: Case 1 Cause Sensor trouble Check & Remedy Use SIM 2-2 to check the resist sensor detection. Case 2 Cause Disconnection of the harness in the ADF. Check & Remedy Check the harness in the ADF. Case 3 Cause ADF control PWB trouble Check & Remedy Replace the ADF control PWB.

• Code: U5 03
• Description: ADF timing sensor trouble
• Causes: ADF timing sensor detection trouble
• Remedy: Case 1 Cause Sensor trouble Check & Remedy Use SIM 2-2 to check the resist sensor detection. Case 2 Cause Disconnection of the harness in the ADF. Check & Remedy Check the harness in the ADF. Case 3 Cause ADF control PWB trouble Check & Remedy Replace the ADF control PWB.

• Code: U5 11
• Description: Paper feed motor operation abnormality
• Causes: Paper feed motor operation abnormality
• Remedy: Case 1 Cause Motor lock, motor RPM abnormality, Over current to the motor, ADF control PWB trouble Check & Remedy Use SIM 2-2/3/4 to check the paper feed motor operation.

• Code: U6 00
• Description: Desk communication trouble
• Causes: Desk communication error, communication test error when turning on the power or after canceling the exclusive simulation.
• Remedy: Case 1 Cause Improper connection or disconnection of the connector and the harness. Check & Remedy Check the connector and the harness in the communication line. Turn OFF/ON the power to cancel the error. Case 2 Cause Desk control PWB trouble, control PWB (PCU) trouble, malfunction caused by noises Check & Remedy Turn OFF/ON the power to cancel the error.

• Code: U6 01
• Description: Desk cassette 1 lift-up trouble
• Causes: DLUD1 does not turn on within the specified time.
• Remedy: Case 1 Cause DLUD1 sensor trouble, paper feed unit harness disconnection Check & Remedy Check DLUD1 and the harness and the connector. Case 2 Cause Cassette 1 lift-up motor trouble, desk PWB, lift-up unit trouble Check & Remedy Check the lift-up unit.

• Code: U6 02
• Description: Desk cassette 2 lift-up trouble
• Causes: DLUD2 does not turn on within the specified time.
• Remedy: Case 1 Cause DLUD2 sensor trouble, paper feed unit harness disconnection Check & Remedy Check DLUD2 and the harness and the connector. Case 2 Cause Cassette 2 lift-up motor trouble, desk PWB, lift-up unit trouble Check & Remedy Check the lift-up unit.