Trouble Shooting
| Step | Cause | Solution | Parts |
| 1 | Toner usage remain may be low. | Replace toner cartridge | Toner 6K (015-0296-21) 10K (015-0297-21) |
| 2 | Develop unit defective. | Replace the develop unit. | Develop unit (015-0204-21) |
| 3 | HVPS defective. | Replace HVPS. | HVPS (005-3141-9-SP) |
| 4 | 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) |
