Muratec MFX-1300 - Heater Error; Thermistor Disconnect; Thermistor Short; Inside Fan Error

4-22
The errors messages and an explanation of each are outlined below.
Heater Error
Symptom: fuser heater malfunction.
Suggested corrective action:
1. Check the connectors from the power supply to the main control PCB and to the fuser unit.
2. Check the heater lamp. If it comes on, see step 3; if it does not, see step 5.
3. Check continuity of fuser unit. If OK, see step 4; if bad, replace the fuser unit.
4. Replace the power supply unit.
5. Replace the fuser unit. If the problem is not correct, see step 6.
6. Replace the main control PCB.
Thermistor Disconnect
Symptom: broken or blown the heater lamp or thermistor in fuser unit.
Suggested corrective action:
1. Check the connectors from the power supply to the main control PCB and to the fuser unit.
2. Check the heater lamp. If it comes on, see step 3; if it does not, see step 5.
3. Check continuity of fuser unit. If OK, see step 4; if bad, replace the fuser unit.
4. Replace the power supply unit.
5. Replace the fuser unit. If the problem is not correct, see step 6.
6. Replace the main control PCB.
Thermistor Short
Symptom: broken or blown the heater lamp or thermistor in fuser unit.
Suggested corrective action:
1. Check the connectors from the power supply to the main control PCB and to the fuser unit.
2. Check the heater lamp. If it comes on, see step 3; if it does not, see step 5.
3. Check continuity of fuser unit. If OK, see step 4; if bad, replace the fuser unit.
4. Replace the power supply unit.
5. Replace the fuser unit. If the problem is not correct, see step 6.
6. Replace the main control PCB.
Inside Fan Error
Symptom: inside fan malfunction.
Suggested corrective action:
1. Verify the inside fan rotates when the power is on.
2. Check the connection between the Connect Printer PCB (P1313) and the fan.
3. Replace the fan motor if it doesn’t rotate.
4. If the problem is not correct, replace the main control board.