Trouble Shooting
| Step | Cause | Solution | Parts |
| 1 | OPC(Organic Photo Conductor) of drum unit worn out. | Replace the drum unit. | Drum (015-0289-21) |
| 2 | Toner cartridge defective. | Replace toner cartridge | Toner 6K (015-0296-21) 10K (015-0297-21) |
| 3 | Develop unit defective. | Replace the develop unit. | Develop unit (015-0204-21) |
