Xerox Phaser 3435 Service Manual page 90

Image Quality
IQ 20 Signs and Measures of Poor Print Cartridge
Fault
Light image and par-
tially blank image
(The life is ended.)
Toner Contamina-
tion
3-24
Signs
• The printed image
is light or unclean
and untidy.
• Some part of the
image is not printed.
• Periodically a noise
as "tick tick" occurs.
• Toner is fallen on
the papers periodi-
cally.
• Contaminated with
toner on prints partly
or over the whole
surface.
Table 1:
Cause & Check
1. If the image is light or
unclean and untidy printed
image -Shake the print car-
tridge and then recheck.
(1)NG: Check the weight of
the print cartridge
(2)OK: Lack of toner, so the
life is nearly closed.
2. Some part of image is not
printed -Shake the print car-
tridge and then recheck.
(1)NG: Check the weight of
the print 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
print cartridge.
4. White vertical stripes on the
whole screen or partly: Check
the weight of the print car-
tridge.
1. Toner is fallen on the paper
periodically.
(1)Check the cycle of the fall-
ing of the toner.
(2)Check the appearance of
both ends of the print car-
tridge OPC drum.
2.The centre of the printed
matter is contaminated with
toner.
(1)Check whether foreign
substances or toner are stuck
to the terminal (contact point)
of the print cartridge.
(2)Check whether the state of
the terminal assembly is nor-
mal.
5/08
Solution
1. All of 1, 2, 3 above-If it
become better by shaking,
replace with a new print car-
tridge after 50-100 sheets in the
closing state of the life span.
2. In case of 2-If it becomes bet-
ter after cleaning the LSU win-
dow, then the print 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 print cartridge
has been nearly exhausted.
(Purchase and replace with a
new print cartridge after using
about 200 sheets at the point of
occurrence)
4. In case of 3-This is a phe-
nomenon caused by lack of
toner, so replace with a new
print cartridge.
1. If both ends of the OPC drum
are contaminated with toner:
Check the life of the print car-
tridge.
2. Check whether it could be
recycled.
3. If it cannot be recycled:
Replace the print cartridge.
Phaser 3435