• Code: 35
• Description: Fuser Main Lamp Failure, Code 35 The lamp control circuit has failed resulting in the front thermistor detecting an overheat condition. Note If this failure reoccurs three times successively, an Engine NVRAM value is set preventing further printer use until the Clear Tech Rep Fault is performed.
• Causes: • Fuser • Engine Control Board
• Remedy: 1 1. Turn OFF power and remove the fuser assembly and allow it to cool down. 2. Measure the resistance between the Fuser connector P600-4 and P600-6. 3. Does the resistance measure between 30 K and 190 K Ohms? Go to step 2. Replace the fuser assembly. 2 1. Reinstall the fuser assembly. 2. Enter service diagnostics. 3. From the Sensor Tests run the Fuser Temperature test. 4. Is the temperature indicated approximately 165o C? Go to step 4. Go to step 3. 3 1. Turn OFF printer power. 2. Measure the resistance between J641- 2 and J641-3 on the Engine Control Board. 3. Does the resistance measure between 30 K and 190 K Ohms? Go to step 4. Repair or replace the wiring harness. 4 1. Turn printer power back ON. 2. Is there ~+3.4 VDC between J590-5 and ground? Check the AC wiring harness to the fuser. If the check is OK, replace the AC drive assembly. Replace the engine control board.

• Code: 41
• Description: Install or Reseat Fuser, Code 41 Front thermistor open error. This is a cold condition. Note If this failure reoccurs three times successively, an Engine NVRAM value is set preventing further printer use until the Clear Tech Rep Fault is performed.
• Causes: • Fuser • Engine Control Board
• Remedy: 1 1. Turn OFF power and remove the Fuser Assembly. 2. Measure the resistance between the fuser connector P600-4 and P600-6. 3. Does the resistance measure between 30 K and 190 K Ohms? Go to step 2. Replace the fuser assembly. 2 1. Reinstall the fuser assembly. 2. Enter service diagnostics. 3. From the Sensor Tests run the Fuser Temperature test. 4. Is the temperature indicated approximately 165o C? Replace the engine control board. Go to step 3. 3 1. Turn OFF printer power. 2. Check for an open circuit or poor connection between J600-4 to J600-6 to J404A-2. 3. Is the wiring OK? Replace the engine control board. Repair or replace the wiring harness.

• Code: 42, 43
• Description: Fuser STS (Front) Warm Time Failure, Code 42 Main heater warm-up error. The temperature did not reach the “Ready” temperature within the specified time. Fuser SSR1 On Time Failure, Code 43 The main heater remained ON for more than the specified time.
• Causes: • Fuser • Engine Control Board
• Remedy: 1 1. Turn OFF power, remove the Fuser Assembly and allow it to cool down. 2. Measure the resistance between the Fuser connector P600-4 and P600-6. 3. Does the resistance measure between 30 K and 190 K Ohms? Go to step 2. Replace the fuser assembly. 2 1. Measure the resistance between fuser connector P600-1 and P600-12. 2. Does the resistance measure 20 Ohms or less? Go to step 3. Replace the fuser assembly. 3 1. Reinstall the fuser assembly. 2. Enter service diagnostics. 3. From the Sensor Tests run the Fuser Temperature test. 4. Is the temperature indicated approximately 165o C? Go to step 5. Go to step 4. 4 1. Turn OFF the printer power. 2. Check for an open circuit or poor connection between J641-2 and J404A-2. 3. Is the wiring OK? Replace the engine control board. Repair or replace the wiring harness. 5 Is the line voltage present at FS41 on the AC Drive Board? Go to step 6. Go to step 7. 6 1. Check the wiring harness between FS41 and J600-1 for an open circuit or poor connection. 2. Is the wiring harness OK? Replace the fuser assembly. Replace the AC power chassis assembly. 7 Check for +5 VDC at P/J 590-5 on the AC Drive Board. Go to step 8. Replace the engine control board. 8 Check for +24 VDC at P/J 590-1 on the AC Drive Board. Replace the AC power chassis assembly. Replace the fuser assembly.

• Code: 44
• Description: Fuser Sub Lamp Overheat Failure, Code 44 The front thermistor has detected an overheat condition. Note If this failure reoccurs three times successively, an Engine NVRAM value is set preventing further printer use until the Clear Tech Rep Fault is performed.
• Causes: • Fuser • Engine Control Board
• Remedy: 1 1. Turn OFF power, remove the fuser assembly and allow it to cool down. 2. Measure the resistance between the Fuser connector P600-7 and P600-9. 3. Does the resistance measure between 30 K and 190 K Ohms? Go to step 2. Replace the fuser assembly. 2 1. Reinstall the fuser assembly. 2. Enter service diagnostics. 3. From the Sensor Tests run the Fuser Temperature test. 4. Is the temperature indicated approximately 165o C? Go to step 4. Go to step 3. 3 1. Turn OFF printer power. 2. Measure the resistance between J641-4 and J641-5 on the engine control board. 3. Does the resistance measure between 30 K and 190 K Ohms? Go to step 4. Repair or replace the wiring harness. 4 1. Turn printer power back ON. 2. Is there ~+3.4 VDC between J590-3 and ground? Check the AC wiring harness to the fuser. If the check is OK, replace the AC drive assembly. Replace the engine control board.

• Code: 45
• Description: Fuser STS (Rear) Failure, Code 45 Rear Thermistor open error. The machine logic detected an open circuit in the rear thermistor.
• Causes: • Fuser • Engine Control Board
• Remedy: 1 1. Turn OFF power, remove the fuser assembly and allow it to cool down. 2. Measure the resistance between the Fuser connector P600-7 and P600-9. 3. Does the resistance measure between 30 K and 190 K Ohms? Go to step 2. Replace the fuser assembly. 2 1. Reinstall the fuser assembly. 2. Enter service diagnostics. 3. From the Sensor Tests run the Fuser Temperature test. 4. Is the temperature indicated approximately 165o C? Replace the engine control board. Go to step 3. 3 1. Turn printer power OFF. 2. Check for an open circuit or poor connection between J641-4 and J641-5. 3. Is the wiring harness OK? Replace the engine control board. Repair or replace the wiring harness.

• Code: 46, 47
• Description: Fuser STS (Rear) Warm Time Failure, Code 46 Sub-heater warm-up error. The temperature did not reach “Ready” temperature within the specified time. Fuser SSR2 On Time Failure, Code 47 The Sub-heater remained ON for more than the specified time.
• Causes: • Fuser • Engine Control Board
• Remedy: 1 1. Turn OFF power, remove the fuser assembly and allow it to cool down. 2. Measure the resistance between the Fuser connector P600-7 and P600-9. 3. Does the resistance measure between 30 K and 190 K Ohms? Go to step 2. Replace the fuser assembly. 2 1. Measure the resistance between fuser connector P600-3 and P600-12. 2. Does the resistance measure 20 Ohms or less? Go to step 3. Replace the fuser assembly. 3 1. Reinstall the fuser assembly. 2. Enter service diagnostics. 3. From the Sensor Tests run the Fuser Temperature test. 4. Is the temperature indicated approximately 165o C? Go to step 5. Go to step 4. 4 1. Turn printer power OFF. 2. Check for an open circuit or poor connection between J641-4 and J641-5. 3. Is the wiring harness OK? Replace the engine control board. Repair or replace the wiring harness. 5 1. Is line voltage present at FS47 on the AC drive board? Go to step 6. Go to step 7. 6 1. Check the wiring harness between FS47 and J600-1 for an open circuit or poor connection. 2. Is the wiring harness OK? Replace the fuser assembly. Replace the AC power chassis assembly. 7 1. Check for +5 VDC at P/J 590-3 on the AC drive board. Go to step 8. Replace the engine control board. 8 1. Check for +24 VDC at P/J 590-1 on the AC drive board. Replace the AC power chassis assembly. Replace the fuser assembly.

• Code: 48
• Description: Fan Failure, Code 48 The machine logic detected a failure of the Fuser fan, LVPS fan, or rear fan.
• Causes: • Fuser Fan • LVPS Fan • Rear Fan
• Remedy: 1 1. Enter service diagnostics and run the fan test. 2. Does the fuser fan rotate at a high speed? Go to step 4. Go to step 2. 2 1. Check for voltage at J222-4. 2. Does the voltage measure +24 VDC? Go to step 3. Check the wiring to the fuser fan, if the wiring is OK, replace the engine control board. 3 Does the front panel indicate the fans are ON? Replace the fan. Check the wiring to the fuser fan, if the wiring is OK, replace the engine control board. 4 Does the rear fan revolve at high speed? Go to step 7. Go to step 5. 5 1. Check for voltage at J552-1. 2. Does the voltage measure +24 VDC? Go to step 6. Check the wiring to the rear fan, if the wiring is OK replace the interface board. If the problem continues, replace the engine control board. 6 Does the front panel indicate the fans are ON? Replace the rear fan. Check the wiring tot he rear fan, if the wiring is OK, replace the engine control board. 7 Does the LVPS fan revolve at high speed? The fans are operating correctly. If the problem persists, replace the engine control board. Go to step 8. 8 1. Check for voltage at J214-4. 2. Is +24 VDC present? Go to step 9. Check the wiring to the LVPS fan, if the wiring is OK, replace the engine control board. 9 Does the front panel indicate the fans are ON? Replace the LVPS assembly. Check the wiring to the LVPS fan, if the wiring is OK, replace the engine control board.

• Code: 60
• Description: Imaging Unit Motor Failure, Code 60
• Causes: • Imaging Unit Drive Motor • Engine Control Board
• Remedy: 1 1. Enter service diagnostics and run the Imaging Unit Motor test. 2. Does the motor operate correctly? Go to step 7. Go to step 2. 2 1. Is the voltage at J210-5 +5 VDC? Go to step 3. Replace the engine control board. 3 1. Is the voltage at J210-7 +24 VDC? Go to step 4. Use the +24 VDC wirenets to troubleshoot and resolve the missing voltage. 4 1. Enter service diagnostics. 2. While running the Imaging Unit Motor test, check the voltage at J210-1 and J210-2. 3. Is the voltage 0 VDC while the test is running? Go to step 5. Replace the engine control board. 5 Is the frequency between J210-4 and ground between 1 KHz and 1.3 KHz? Replace the imaging unit drive motor. Go to step 6. 6 1. Check for a short to ground at J210-4. 2. Is the wire grounded? Repair or replace the wiring harness. Replace the engine control board. 7 1. Enter service diagnostics. 2. While running the Imaging Unit Motor test, check the voltage at J210-9. 3. Is the voltage +5 VDC while the test is running? Replace the imaging unit drive motor. Replace the engine control board.