Xerox Phaser 3450, Service Manual, Page: 96 / 155

7-21
TROUBLESHOOTING
Service Manual
7.4.5 Signs and Measures at Poor toner cartridge
Fault Signs Cause & Check Solution
Light image and
partially blank
image
(The life is ended.)
Toner
Contamination
• The printed image
is light or unclean
and untidy.
• Some part of the
image is not print-
ed.
• Periodically a noise
as "tick tick" occurs.
• Toner is fallen on
the papers periodi-
cally.
• Contaminated with
toner on prints part-
ly or over the whole
surface.
1. If the image is light or unclean
and untidy printed image -
Shake the toner cartridge and
then recheck.
(1)NG: Check the weight of the
toner cartridge
(2)OK: Lack of toner, so the life
is nearly closed.
2. Some part of image is not
printed - Shake the toner
cartridge and then recheck.
(1)NG: Check the weight of the
toner cartridge and
clean the LSU window
with a cotton swab,
then recheck.
(2)OK: Lack of toner, so the life
is nearly closed.
3. Periodically a noise as "tick
tick" occurs - Measure the
cycle and the weight of the
toner cartridge.
4. White vertical stripes on the
whole screen or partly :
Check the weight of the toner
cartridge.
1. Toner is fallen on the paper
periodically.
(1)Check the cycle of the
falling of the toner.
(2)Check the appearance of
both ends of the toner car-
tridge OPC drum.
2.The center of the printed mat-
ter is contaminated with toner.
(1)Check whether foreign sub-
stances or toner are stuck
to the terminal (contact
point) of the toner cartridge.
(2)Check whether the state of
the terminal assembly is
normal.
1. All of 1, 2, 3 above-
If it become better by shaking,
replace with a new toner car-
tridge after 50-100 sheets in the
closing state of the life span.
2. In case of 2-
If it becomes better after clean-
ing the LSU window, then the
toner cartridge is normal.
(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
toner cartridge has been nearly
exhausted.( Purchase and
replace with a new toner car-
tridge 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 toner cartridge.
1. If both ends of the OPC drum
are contaminated with toner:
Check the life of the toner car-
tridge.
2. Check whether it could be recy-
cled.
3. If it cannot be recycled:
Replace the toner cartridge.
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