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1 Nov. '87
1-6 UNEVEN DENSITY
1. IMAGE DENSITY GRADUALLY CHANGES ACROSS THE COPY
- Possible Causes -
Charge corona wire height not even
Charge corona wire dirty
. Doctor gap not even
- Action -
Are any of the optics parts dirty?
Toner Shield Glass
Exposure Glass
Mirrors, Lens, Reflectors
Y
N
Is the exposure lamp stained black?
Y
N
Correct uneven exposure using the adjusting plates.
Replace the exposure lamp.
Clean them. If the problem is still not solved, do the following:
Clean the charge corona wire. Is the charge corona wire incorrectly posi-
tioned in the wire cleaner and end block?
N
Y
Is the charge corona current uneven across the drum?
Y
N
Adjust the charge corona current and wire height.
Position the wire correctly.
If the problem still exists, check and adjust the doctor gap.
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