Ricoh A085, Manual

Page: 591 / 617

2.11 TONER DENSITY TOO HIGH
- Phenomenon -
1. Dirty background appears on the copy.
2. The image density of black solid areas is too high.
3. Toner has built up on the endblock cover of the T/S corona unit and also
on the PTL top mylar.
- Possible Causes -
1. Toner supply clutch keeps on turning continuously.
2. Copier is in abnormal fixed toner supply mode.
3. Main Control board is defective.
4. ID sensor pattern bias is too low.
5. ID sensor grid bias voltage is too low.
- Action -
Check the Vsp/Vsg data by SP55.
Clean the ID 4 V sensors and around the drum including the development
unit.
Adjust ID/V sensors by SP54.
Can the ID sensor be adjusted correctly?
Yes No
Refer to the section of SC74.
Enter to SP55 (Vsp/Vsg data) and make sky shot copies until Vsp becomes
around 0.4 V.
COPY QUALITY 12 February 1992
6-16