Trouble Shooting: Image Faults - Oce 3121 Technical & Service Manual

4 Trouble shooting: image faults

The copy is too light (half-tone only)
Cause
Incorrect AE adjustment 2
Position of the develop-
ing unit
Developing unit
Scanner (dirty)
OPC
6 TSM Océ 3121
Step Checks
1 Carry out the image
adjustment procedure. Is
the problem corrected?
Is the pattern print placed
in reverse (left/right) ori-
entation?
Make copies in AE
mode. Are the images too
light?
3 Is the developing roller in
correct contact with the
OPC?
4 Is there an even coating
of toner on the develop-
ing roller?
5 Clean the mirror, the lens
and the exposure aper-
ture. Is the image cor-
rected?
Y/N Action
Yes End.
The image will be much
lighter if the pattern print
is placed in reverse
(left/right) orientation.
Ensure correct orienta-
tion of the test chart.
Yes Carry out AE adjustment
In the case of 'image
I
quality priority' mode,
increase the setting
*3*->AD-
JUST->AE_DARK.
In the case of 'speed
I
priority' mode, increase
the setting under
*3*->AD-
JUST->ABC_TBL.
No Check that the lever for
the developing unit is
correctly positioned, and
check the surface of the
developing roller for for-
eign matter.
No Check the developing
unit.
Yes End.
No Replace the OPC unit
Image quality