Ricoh HL-F1 Field Service Manual page 224

6. Troubleshooting
Yes: Clean the pressure roller referring to the following procedure.
2. Dirt in the drum unit
• Is the transfer roller dirty? Is the problem solved after replacing the drum unit?
Yes: Replace the drum unit
No: Replace the high-voltage power supply PCB.
• This problem may disappear after printing approximately 10 pages of completely blank
sheets.
How to clean the pressure roller
Clean the pressure roller as follows;
1. Set 5 or more sheets of paper in the paper tray.
2. Press the "Menu/Set", "Start", , , ,
maintenance mode.
3. Press the "6" and "7" keys. The machine starts to print the grid pattern continuously.
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4. When five pages are printed, press the "Stop" key. The machine returns to the initial stage of the
maintenance mode.
5. Press the "9" key twice so that the machine returns to the ready status.
I-6 Black and blurred vertical streaks
User Check
1. Clean the corona wire in the drum unit.
2. Check that the wire cleaner is at the home position.
3. Check that the toner cartridge is not empty.
4. The drum unit may be damaged. Install a new drum unit.
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keys in this order so that the machine goes into the