Ricoh FT5535 Service Manual page 205

3.12 TONER DENSITY TOO LOW
- Problem -
1. Light copies
2. Carrier on the copies.
3. Light spots appear in solid black areas.
- Possible Causes -
1. The toner supply clutch does not rotate.
2. The copier entered fixed toner supply mode due to an abnormal sensor
condition.
3. The main control board is defective.
4. The V pattern bias is too low.
SP
5. The drum charge voltage for making V
- Action -
Check the values of V
respectively.
Clean the ID sensor and around the drum.
Adjust the ID sensor with SP3-001.
Can the ID sensor be adjusted correctly?
Yes No
Refer to the section that deals with SC351.
Perform forced toner supply (SP2-207) until V
(around 0.4 V). Check V
FT5535/4527/4522
SP
and V with SP3-103-001 and SP3-103-002
SP SG
with SP3-103-001 as necessary.
SP
6-18
patterns is too high.
is at about the threshold level
SP
FSM