Toshiba DP1610
Troubleshooting. Image. 06 White banding (at right angles to feeding direction), Black banding (in feeding direction)
(6) White banding (at right angles to feeding direction)
| Step | Cause/Defect area | Check items | Measures |
|---|---|---|---|
| 1 | Process unit (developer) | Developing bias terminals (process unit) and corresponding terminals (main body) stained? | Clean terminals. |
| 2 | Transfer charger unit | Transfer charger unit securely installed? | Re-install transfer charger unit securely. |
| 3 | Transfer charger wire terminals and corresponding terminals stained? |
Clean terminals. | |
| 4 | Is guide roller stained or rotating improperly? Guide roller stained or rotating improperly? Guide roller shaft grouded improperly? |
Clean guide roller. Ground shaft properly. When guide roller rotates improperly, replace transfer charger unit. |
|
| 5 | Process unit (drum) | Any abnormalities on drum surface? | Replace process unit or drum. |
| 6 | Fuser unit | Toner on heat roller surface? Scratches on heat roller surface? |
Clean heat roller. If problem persists, replace heat roller. |
| 7 | Gear and roller | Check each gear or roller for paper feed and transport is damaged? | Replace defective gear or roller. |
| 8 | HVPS (main charger, transfer charger and developer bias) | High-voltage output defective? | Adjust output from HVPS, or replace defective HVPS. |
| 9 | If problem persists after measures are applied, or there is no problem found in above check, follow procedure described in right column. | Replace process unit or transfer charger unit. |
(7) Black banding (in feeding direction)
| Step | Cause/Defect area | Check items | Measures |
|---|---|---|---|
| 1 | Scanner | Foreign matter in optical path? | Clean slit, lens and mirrors. |
| 2 | Process unit (main charger) |
Main charger wire stained? | Clean charger wire. |
| 3 | Foreign matter on grid? | Remove foreign matter. | |
| 4 | Grid dirty or deformed? | Clean grid, replace process unit or grid. | |
| 5 | Process unit (Drum) | Scratches on drum surface? | Replace process unit or drum. |
| 6 | Fuser unit | Dirt or scratches on heat roller surface? |
Clean or replace heat roller? |
| 7 | If problem persists after measures are applied, or there is no problem found in above check, follow procedure described in right column. | Replace process unit or fuser unit. |