Trouble Shooting
| Step | Cause | Solution | Parts |
| 1 | The thermostat is shutting off due to overheat. | Replace the thermostat. | Thermostat (008-0361-9-SP) |
| 2 | Fuser temperature sensor defective. | Relace thermistor temperature sensor. (for A4 or A3 lamp). | Fuser temperature sensor (008-0347-9-SP). |
| 3 | Lamp of fuser defective. | Replace fuser. | Fuser (015-0301-0) |
| 4 | LVPS (Low-Voltage Power Supply) defective. | Replace LVPS. | LVPS (005-3140-9-SP) |
| 5 | Main board defective | Relace main board MBA890. | Main board: AM7630i (004-3479A-9-SP) AM7640i (004-3479B-9-SP) AM5630i (004-3479C-9-SP) AM5640i (004-3479D-9-SP) |
