• Code: U6
• Description: Power Supply Failure Power Supply voltage irregularly high.
• Causes: • LVPS, PL3.1.4
• Remedy: 1 Visually inspect the LVPS for damage or excessive dust. Is the LVPS damaged or dirty? Clean the LVPS if dirty. If damaged, replace the LVPS. Go to Step 2. 2 Check the LVPS output voltages at the POWER connector on the Engine Control Board. Replace the Engine Controller Board. Replace the LVPS or POWER harness.

• Code: U60
• Description: Job Offset Home Position Error Applicable Status Code: Code U60: Job Offset Home Position Sensor does not detect home position for the Job Offset Assembly.
• Causes: • Offset Home Position Sensor, PL11.1.32 • Rear Sensor Board, PL11.1.33 • Job Offset Assembly, PL13.1.1
• Remedy: 1 Check the following for evidence of fault or damage: • Home Position Sensor Actuator • Home Position Sensor • SNS Harness Is there any damage or misalignment? Replace any damaged parts. Go to Step 2. 2 Test the Job Offset Home Position Sensor. Run the Service Diagnostics Offset Home Position test. Does the sensor function correctly? Replace the Engine Control Board. Go to Step 3. 3 Replace the Job Offset Home Position Sensor. Does the error persist? Go to Step 4. Complete. 4 Check the SNS connection. Is SNS connected to the Rear Sensor Board? Go to Step 5. Reconnect the harness. 5 Check for +5V to the sensor. Disconnect P/J150. Is there +5 V at J150-1? Go to Step 6. Replace the Rear Sensor Board. 6 Check the SNS Harness for continuity. 1. Disconnect SNS and P/J150. 2. Check continuity between SNS <=>J150. Go to Step 7. Replace the SNS Harness. 7 Check the Job Offset Home Position signal. Does the voltage change at RSNS-10 when the sensor is actuated? Go to Step 8. Replace the Rear Sensor Board. 8 Check all pins on the RSNS Harness for continuity. Is the harness conductive? Replace the Engine Control Board. Replace the RSNS Harness.

• Code: U61
• Description: Control Panel Communications Failure
• Causes: • Engine Control Board, PL1.1.4 • Control Panel Harness • Control Panel
• Remedy: 1 Check the Control Panel connection. Is the Control Panel Harness connected to OPEPANE on the Engine Control Board? Go to Step 2. Connect the Control Panel harness, 2 Check all pins on the Control Panel Harness for continuity. Disconnect the harness from the Engine Control Board and Control Panel connectors. Is the harness conductive? Replace the Engine Control Board. If the error persists, replace the Control Panel. Replace the harness.

• Code: U7
• Description: Feeder Home Failure U7: Tray 1 (MPT) does not reach home position.
• Causes: • Home Position Sensor, PL8.1.8 • Registration Motor, PL4.2.36 • MPTHOME Harness, PL8.1.9
• Remedy: 1 Check the Tray 1 (MPT) Lift Plate by printing a job from Tray 1 (MPT). Does the Lift Plate operate correctly? Go to Step 3. Go to Step 2. 2 Test the Registration Motor Run the Service Diagnostics Registration Motor B test. Is the motor operating correctly? Replace the Tray 1 (MPT) Assembly. Replace the Registration Motor. 3 Test the Tray 1 (MPT) Home Position Sensor. Run the Service Diagnostics MPT Roller Home test. Does the sensor function correctly? Replace the Engine Control Board. Go to Step 4. 4 Check continuity of the MPTHOME harness. Is the wiring harness conductive? Replace the Engine Control Board. Replace the MPTHOME harness.

• Code: U8
• Description: Controller Fan Failure The Image Processor Board Fan has failed.
• Causes: • IP Fan, PL1.1.74
• Remedy: 1 Check the IP Fan operation and airflow. Does the fan operate correctly? Replace the Engine Control Board. Go to Step 2. 2 Check for +5 V to the fan. Disconnect P/J200 from the Image Processor Board. Is there +5 V at J200-1 <=> ground? Replace the IP Fan. Replace the Image Processor Board.

• Code: U9
• Description: Power Supply Fan Failure The LVPS Fan has failed.
• Causes: • LVPS Fan, PL3.1.2 • LVPS, PL3.1.4 • Engine Control Board, PL1.1.4
• Remedy: 1 Test the LVPS Fan. Run the Service Diagnostics Power Supply Fan test. Does the Fan operate correctly. Replace the Engine Control Board. Go to Step 2. 2 Check the LVPS Fan connection. Is FAN1 securely connected? Go to Step 3. Reconnect the Fan. 3 Verify +24 volts is available to the Fan. Disconnect FAN1. Is there +24 volts at FAN1? Replace the LVPS Fan. Replace the LVPS.

• Code: W16
• Description: Fuse Cut Error In Fuser The in-use fuse for the indicated Fuser remains intact.
• Causes: • Fuser, PL1.1.21
• Remedy: 1 Test the Fuser fuse. Run the Service Diagnostics Read Fuse test on the Fuser. Is the Fuse Cut? Replace the Engine Control Board. Go to Step 2. 2 Replace the Fuser. Cycle the power. Does the error persist? Go to Step 3. Complete. 3 Check all pins of the HEATIF harness between the Fuser and Engine Control Board. Is the HEATIF harness conductive? Replace the Engine Control Board.

• Code: W17
• Description: Fuse Cut Error In Transfer Unit The in-use fuse for the indicated Transfer Unit remains intact.
• Causes: • Transfer Unit, PL1.1.20 • HVPS Cover, PL2.1.27 • HVPS, PL2.1.26
• Remedy: 1 Test the condition of the fuse. Run the Service Diagnostics Read Fuse test for the TBelt. Is the Fuse cut? Replace the Engine Control Board. Go to Step 2. 2 Check the connections between HVPS, HVPS Cover, and Transfer Unit. Are the contacts clean and intact? Install a new Transfer Unit and verify the fuse blows. Clean or align contacts as needed. If the error persists, go to Step 3. 3 Does the error persist? Replace in the following order: HVPS Cover HVPS. Complete