| Symptom |
Cause |
Notes |
| Can not power up |
No power, bad switch |
Check ac outlet, cord, switch |
| Error on start up |
Diagnostic failed |
Refer to service manual for specific model. |
| Vertical black lines on print |
Scratched image drum |
Replace toner cartridge |
| Black smudge |
Leaking toner |
Replace toner cartridge |
| Paper jam very often |
Paper channel blockage |
Replace obstacle |
| Paper feed error |
Too much paper on cassette |
Remove some paper |
| Paper can not feed properly |
Paper feed rollers worn out |
|
| Paper delivery jam and crumble |
Delivery rollers worn out |
Replace rollers |
| Feed multiple sheets |
Sheet separator worn out |
Replace separator |
| Print out can be rubbed out |
Bad fix unit |
Overhaul fix unit |
