Trouble Shooting
| Steps | Cause | Solution | Parts |
| 1 | The LPH unit defective. | Replace the LPH unit. | LPH unit (002-B377-0-SP) |
| 2 | The main board defective. | Replace the main board. <Video Link> | Main board (Please refer to service parts table) |
| 3 | Not conducting between the device and OPC (Organic Photo Conductor) in the drum unit. | Please check the power supply <Video Link> | Power supply (002-B117-0-SP) |
