Trouble Shooting
| Steps | Cause | Solution | Parts |
| 1 | The LSU(Laser Scan Unit) defective. | Replace the LSU unit. | LSU unit (002-8794-0) |
| 2 | The main board defective. | Replace the main board. <Video Link> | Main board (004-3055-9-SP) |
| 3 | Not conducting between the device and OPC (Organic Photo Conductor) in the drum unit. | Please check the power supply <Video Link> | 220V Power supply (005-3134-9-SP) |
