Most of the OKI printing difficulties you might encounter have a simple solution. Before consulting a service representative, make sure you check the table below to see if there is a "quick fix" or something you might have overlooked.
| Symptoms | Problem | Solution |
| Printing Blank sheets printed, or sheets with black stripes. | Image drum cartridge may have been exposed to light. | Leave the drum cartridge in total darkness for several hours. If this fails to restore it, replace the image drum cartridge. |
| Page prints blank. | Transfer wire broken, dirty, or defective, so no charge is delivered. | Clean transfer wire if dirty; if broken or defective, have unit serviced. |
| | Empty toner cartridge. | Replace the toner cartridge. |
| | Entire page prints faintly. | Toner cartridge is empty. Change toner cartridge. Pages get fainter and fainter after toner is used up. |
| Page has gray background. | Static electricity, generally from dry, cotton fiber papers, causes toner to stick to background. | Change papers to an acceptable laser bond or use a humidifier. |
| Page prints all black. | Charge wire broken or defective, so no charge applied to drum. | Replace the image drum cartridge. |
| | Hardware problem. | See your service representative. |
| Page has repetitive marks. | Defective image drum cartridge causes repetitive marks every 3.7 inches due to surface nicks and scratches. | Change the image drum cartridge. |
| | Rollers are dirty, creating "pockmarks". | Change fuser cleaner pad. |
| | If the repetitive marks occur 2.5 inches apart, you may need service. | See your service representative. |
| Page has small random spots. | Fuser roller is dirty | Take out fuser cleaner pad, clean gray fuser roller underneath with cotton swab, put back fuser cleaner pad. |
| An oblong area of faint print appears on each page. | "Dropout" caused by using cotton bonds in high humidity. | Change paper stocks, or use a dehumidifier. |
| | Dirty transfer wire or toner is low. | Clean transfer wire. Check toner. |
| Vertical white streaking or faint areas on page. | Toner is low and does not distribute properly or the drum needs replacing. | Replace toner cartridge. |
| | | Check drum and replace the drum, if necessary. |
| | | See your service representative. |
| | LED array dirty. | Clean LED array. |
| Horizontal black lines on page. | Fusing unit dirty. | Replace fuser pad. |
| Vertical black lines. | Scratched image drum. | Replace the image drum cartridge. |
| | Hardware problem. | See your service representative. |
| Vertical black line on right side. | The charge wire cleaning tab is not in its proper position. | Move the cleaning tab to the extreme right. |
| Vertical black lines, smeared. | Dirty or worn fuser roller cleaner. | Replace the fuser cleaner. |
| Distorted print | Paper path, LED assembly, or fusing unit problem. | See your service representative. |
| Smeared or blotched print. | Defective fuser assembly or other hardware problem. | See your service representative. |