Toner Density Too Low - Ricoh Robin Service Manual

COPY QUALITY

1.13 TONER DENSITY TOO LOW

- Problem -
1. Light copy
2. Carrier on the copy.
3. Light spots appear in black solid areas.
- Possible Causes -
1. The light intensity of the exposure lamp is too low.
2. The toner supply clutch does not rotate.
3. The copier is in the fixed toner supply mode.
4. The main board is defective.
5. The ID sensor voltage is too high.
6. The charge corona current is too high.
7. The ID sensor grid voltage is too high.
- Action -
Does an ID sensor abnormal condition occur?
No Yes
See the ID Sensor Abnormal Condition section.
Does the toner supply clutch rotate?
Yes No
Check the voltage at CN110-1 on the main board.
24 volts 0 volts
Replace the toner supply clutch.
Replace the main board.
Go to A
6-18
24 June 1994