Xerox WorkCentre Pro 412 Service Manual page 219

7-7-12-1 Signs of Low toner cartridge
Fault Signs
Light image and • The printed image
partially blank is light or unclean
image and untidy.
(The life is
ended.) • Some part of the
image is not
printed.
Digital Printer
• Periodically a noise
Digital Printer
as "tick tick"
Digital Printer
occurs.
Digital Printer
Digital Printer
Toner Contamina- • Toner is fallen on
tion the papers periodi-
cally.
• Contaminated with
toner on prints
partly or over the
whole surface.
WorkCentre Pro 412, FaxCentre F12 &
WorkCentre M15/M15i
Cause & Check
1. If the image is light or unclean
and untidy - Shake the developer
and then recheck.
(1)NG: Check the weight of the
developer
(2)OK: Lack of toner, so the life is
nearly finished.
2. Some part of image is not
printed - Shake the developer
and then
recheck.
(1)NG: Check the weight of the
developer and clean the
LSU window with a cotton
swab, then recheck.
(2)OK: Lack of toner, so the life is
nearly finished.
3. Periodically "tick s" occur - Mea-
sure the cycle and the weight of
the developer.
4. White vertical stripes on the
whole screen or partly :
Check the weight of the devel-
oper.
1. Toner is fallen on the paper peri-
odically.
(1)Check the cycle of contamina-
tion.
(2)Check the appearance of both
ends of the developer OPC
drum.
2.The center of the printed matter
is contaminated with toner.
(1)Check whether foreign sub-
stances or toner are stuck to the
terminal (contact point) of the
developer.
(2)Check whether the state of the
terminal assembly is normal.
3/03
Maintenance & Troubleshooting
Solution
1. All of 1, 2, 3 above-
If it become better by shaking, replace
with a new developer after 50-100
sheets in the closing state of the life
span.
2. In case of 2-
If it becomes better after cleaning the
LSU window, then the developer is not
the problem.
(Because of foreign substance on the
LSU window, the image has not been
printed partly.)
3. In case of 3-
If the cycle of noise is about 2 seconds,
the toner inside the developer has been
nearly exhausted.( Purchase and
replace with a new developer after using
about 200 sheets at the point of occur-
rence)
4. In case of 3-
This is a phenomenon caused by lack
of toner, so replace with a new devel-
oper.
1. If both ends of the OPC drum are con-
taminated with toner:
Check the life of the developer.
2. Check whether it could be recycled.
7-49