COPY QUALITY12 February 1992
2.3UNEVEN IMAGE DENSITY
- Phenomenon -
Uneven image density appears on copies.
- Possible Cause -
1. Dirty optics
2. Improper position of exposure adjustment plates
3. Dirty corona wires or grid plate
4. Uneven height of charge corona wire
5. Improper function of cross mixing in the development unit
- Action -
Does the uneven image area shift when a reduction copy is made?
NoYes
Is the optics section dirty?
NoYes
Clean the optics.
Adjust the exposure adjustment plates on the 1st scanner.
(See Uneven Exposure Adjustment.)
Is the erase lamp, quenching lamp, or toner shield glass dirty?
NoYes
Clean the erase lamp, quenching lamp, or toner shield glass.
Clean or replace the corona wires, grid plate, and casings.
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