Trouble Shooting
| Step | Cause | Solution | Parts |
| 1 | Drum defective. | Replace the drum unit. | Drum (015-0289-21) |
| 2 | HVPS (High-Voltage Power Supply) defective. | Replace HVPS. | HVPS (005-3141-9-SP) |
| 3 | Main board defective | Replace 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) |
