Uneven Image Density - Ricoh A151 Field Service Manual

1.3 UNEVEN IMAGE DENSITY

- Problem -
Uneven image density appears on the copies.
- Possible Cause -
1. Dirty optics
2. Uneven exposure adjustment plates
3. Dirty corona wires or grid
4. Uneven height of the charge corona wire
- Action -
Does the uneven image area shift when a reduction copy is made?
No Yes
Is the optics section dirty?
No Yes
Clean the optics and perform the necessary SP modes
in order (SP95, 48 and 56).
Adjust the exposure adjustment plates on the 1st scanner.
(See Side-to-side Exposure Adjustment.)
Is the erase lamp or quenching lamp dirty?
No Yes
Clean the erase lamp or quenching lamp.
Are the corona wires or grid plate dirty?
No Yes
Clean the corona wires, grid plate, and casings.
Adjust the charge corona wire height using a drum shoe.
(See Charge Corona Current Adjustment.)
FSM 6-7 A151/A152