Ricoh HL-F1 Field Service Manual page 225

5. The toner cartridge may be damaged. Install a new toner cartridge.
Possible cause and Remedy
1. Corona failure
• Is the vertical block streak about 10mm wide? (Check if the wire cleaner is at its home position.)
Yes: Return the wire cleaner to its home position.
2. Dirt in the paper feed system
• Is the paper tray or feed system on the drum unit dirty with toner?
Yes: Clean the toner off.
3. Scratch on the drum
• Is the drum surface scratched?
Yes: Replace the drum unit.
4. Cleaning failure
• Is the drum surface dirty with toner in streaks?
Yes: Replace the drum unit.
5. Scratch on the heat roller
• Is the surface of the heat roller scratched?
Yes: Replace the fixing unit.
• If you print he same pattern (especially vertical streaks) continuously, electrostatic charge performance
of the drum will decrease temporarily and black vertical streaks may appear on the paper
• This problem may occur with noise due to the corona wire being dirty. In that case, clean the corona
wire with the wire cleaner.
I-7 Black and blurred horizontal stripes
Troubleshooting Guide
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