Table of Contents
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MAINTENANCE AND INSPECTION
Pre-Checks
Clean the static eliminator.
Is the density correction vol-
NO
ume (VR850) on the service
switch PCB centered on the
black dot?
Turn the copy density
Adjust pointer to
YES
correction volume
black dot on
(VR850) clockwise so
panel.
that No. 8 darkens.
(Note 2).
Make sure that all input
values of service mode [3]
are as indicated on the
label attached to the front
door; if different, correct
them.
Make two to three copies
in non-AE and at copy
density 5. (NA-3)
Check the following:
1. density of gray scale
No. 8
2. presence/absence of
fogging in white back-
ground
IV. MAINTENANCE AND INSPECTION
Optimum Density Adjustment
YES
Is the density of gray scale
End the
No. 8 optimum?
adjust-
ment.
NO
Is the density of gray scale
too high (dark)?
YES
NO
Turn the copy density
correction volume
(VR850) counterclock-
wise so that No. 8
lightens. (Note 2)
Make one copy.
Note 1:
For NA-3 (Test Charts), make sure that No. 8 on
the copy is of the same density as No. 4 through
No. 7 of the charts.
Note 2:
A shift is made in the control of the developing
bias (DC component).
A. Image Adjustment Procedure
1–5
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Table of Contents
Troubleshooting
