• Code: 010-349
• Description: Fuser Front Thermistor Open The Front Thermistor open error. This is a cold condition.
• Remedy: 1 1. Turn the printer power Off 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 (PL 7.1). 2 1. Reinstall the Fuser Assembly. 2. Enter Service Diagnostics Menu (refer to Control Panel Diagnostics). Run the Fuser Temperature test. 3. Is the temperature indicated approximately 165°C? Go to step 4. Go to step 3. 3 1. Turn the printer power Off. 2. Check for an open circuit or poor connection between J600-4 J600-6 to J412-8 to J600-6, and J412-9 to J600- 4. 3. Is the wiring OK? Replace the Engine Control Board (MCU PWB). Repair or replace the wiring harness.

• Code: 010-350
• Description: Fuser Sub Lamp Heat Fail The Rear Thermistor has detected an overheat condition.
• Remedy: 1 1. Turn the printer power Off. 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 (PL 7.1). 2 1. Reinstall the Fuser Assembly. 2. Enter Service Diagnostics Menu (refer to Control Panel Diagnostics). Perform the Fuser Temperature test. 3. Is the temperature indicated approximately 165°C? Go to step 4. Go to step 3. 3 1. Turn the printer power Off. 2. Measure the resistance between J641-4 J641-5 on the Engine Control Board. 3. Does the resistance measure between 30 K and 190 K Ohms? Replace the Engine Control Board (MCU PWB). Repair or replace the wiring harness. 4 1. Turn the printer power On. 2. Is there ~+3.4 VDC between J590-3? Check the AC wiring harness to the Fuser. If the check is OK, replace the AC Drive Assembly. Replace the Engine Control Board (MCU PWB).

• Code: 010-351
• Description: Fuser Rear Thermistor Open The Rear Thermistor open error. The machine logic detected an open circuit in the Rear Thermistor.
• Remedy: 1 1. Turn the printer power Off. 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 (PL 7.1). 2 1. Reinstall the Fuser Assembly. 2. Enter Service Diagnostics Menu (refer to Control Panel Diagnostics). Perform the Fuser Temperature test. 3. Is the temperature indicated approximately 165°C? Go to step 4. Go to step 3. 3 1. Turn the printer power Off. 2. Check for an open circuit or poor connection between J641-4 J641-5. 3. Does the resistance measure between 30 K and 190 K Ohms? Replace the Engine Control Board (MCU PWB). Repair or replace the wiring harness.

• Code: 010-352
• Description: Main Heater Warm Up The temperature did not reach the Ready temperature.
• Remedy: 1 Turn off the power, remove the Fuser, and allow it to cool down. Measure the resistance between the Fuser connector P600-1 and P600-12 on the Fuser Assembly (pin numbers are marked on tapered edge of P600 housing. Is less than 20 ohms measured? Go to step 2. Replace the Fuser (PL 7.1). 2 Measure the resistance between the Fuser connector pins P600-4 -and P600-5. Is the resistance between 30 and 190 ohms? Go to step 3. Replace the Fuser (PL 7.1). 3 Reinstall the Fuser and switch on the power. Measure the voltage between P/J48 and P/ J46 on the AC Drive PWB (PL 9.2). Is it AC Line Voltage? Go to step 4. Go to step 5. 4 and . Check the wires and connectors for continuity and that they are not grounding to the frame. Is the check OK? Replace the Fuser (PL 7.1). Repair the wiring harness. 5 Measure the voltage at P/J590-5 on the AC Drive PWB (PL 9.2). Is it less than 1 VDC? Go to step 7. Go to step 6. 6 Check the wires and connectors for continuity and that they are not grounding to frame. Is the check OK? Replace the Engine Control Board (MCU PWB). Repair the wiring harness. 7 While the Fuser is warming up, is +5VDC is measured at P/J590-2 on the AC Drive PWB (PL 9.2)? Replace the AC Power Chassis Assembly (PL 9.2). Go to step 8. 8 Check the wires and connectors for continuity and that they are not grounding to frame. Is the check OK? Replace the Engine Control Board (MCU PWB). Repair the wiring harness.

• Code: 010-354, 010-527
• Description: Sub Heater Warm Up The temperature did not reach the Ready temperature.
• Remedy: 1 Turn off the power, remove the Fuser, and allow it to cool down. Measure the resistance between P600-3 and P600-12 on the Fuser (pin numbers are marked on tapered edge of P600 housing). Is less than 50 ohms measured? Go to step 2. Replace the Fuser (PL 7.1). 2 Measure the resistance between the Fuser connector P600-7 and P600-8. Is the resistance between 30 and 190 ohms? Go to step 3. Replace the Fuser (PL 7.1). 3 Reinstall the Fuser and switch on the power. Measure the voltage between P/J48 and P/ J47 on the AC Drive PWB (PL 9.2). Is it AC Line Voltage? Go to step 4. Go to step 5. 4 and . Check the wires and connectors for continuity and that they are not grounding to frame. Is the check OK? Replace the Fuser (PL 7.1). Repair the wiring harness. 5 Measure the voltage at P/J590-5 on the AC Drive PWB (PL 9.2). Is it less than 1 VDC? Go to step 7. Go to step 6. 6 Check the wires and connectors for continuity and that they are not grounding to frame. Is the check OK? Replace the Engine Control Board (MCU PWB). Repair the wiring harness.

• Code: 010-391
• Description: LVPS Fan Fail The machine logic detected a failure LVPS Fan.
• Remedy: 1 Enter Service Diagnostics Menu (refer to Control Panel Diagnostics). Does the LVPS Fan revolve at high speed? Go to step 3. Go to step 2. 2 Is +24 VDC present at J214-4? Go to step 3. Check the wiring to the LVPS Fan. If the wiring is OK, replace the Engine Control Board (MCU PWB). 3 Does the Control 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 (MCU PWB).

• Code: 010-392
• Description: Rear Cooling Fan Fail The machine logic detected a failure of the Rear Fan.
• Remedy: 1 Enter Service Diagnostics Menu (refer to Control Panel Diagnostics). Does the Rear Fan revolve at high speed? Go to step 3. Go to step 2. 2 Is +24 VDC present at J552-1? Go to step 3. 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 (MCU PWB). 3 Does the Control Panel indicate the Fans are On? Replace the Rear Fan. Check the wiring to the Rear Fan. If the wiring is OK, replace the Engine Control Board (MCU PWB).

• Code: 010-398, 010-527
• Description: Fuser Fan Fail The machine logic detected a failure of the Fuser Fan.
• Remedy: 1 Enter Service Diagnostics Menu (refer to Control Panel Diagnostics). Perform the Fan Motors test. Does the Fuser Fan rotate at a high speed? Go to step 3. Go to step 2. 2 Is +24 VDC present at J222-4? Go to step 3. Check the wiring to the Fuser Fan. If the wiring is OK, replace the Engine Control Board (MCU PWB). 3 Does the Control Panel indicate the Fans are On? Replace the Fuser Fan. Check the wiring to the Fuser Fan. If the wiring is OK, replace the Engine Control Board (MCU PWB).