3.11 TONER DENSITY TOO HIGH
- Problem -
1. Dirty background appears on the copy.
2. The image density of black solid areas is too high.
- Possible Causes -
1. The toner supply clutch keeps turning continuously.
2. The copier entered fixed toner supply mode due to an abnormal sensor
condition.
3. The main control board is defective.
4. The VSP pattern development bias is too high.
5. The drum charge voltage for making VSP patterns is too low.
- Action -
Check the values of VSP and VSG with SP3-103-001 and SP3-103-002
respectively
Clean the ID sensor and around the drum including the development unit.
Adjust the ID sensor with SP3-001.
Can the ID sensor be adjusted correctly?
Yes No
Refer to the section dealing with SC351.
Enter SP3-103-001 (displays the value of VSP) and make sky-shot copies until
VSP becomes about 0.4 V.
FT5535/4527/4522 6-16 FSM
To Next Page