Xerox Phaser 3435 Service Manual page 91

Fault
White Black spot
Recycled product
Phaser 3435
Signs
• Light or dark black
dots on the image
occur periodically. •
White spots occur in
the image periodi-
cally.
• Poor appearance
of the print cartridge.
• Unclean and rough
printouts. • Bad
background in the
image.
Table 1:
Cause & Check
1. If light or dark periodical
black dots occur, this is
because the print cartridge
rollers are contaminated with
foreign substance or paper
particles.
(1)38mm interval: Charged
roller
(2)95mm interval: OPC cycle
2. If white spots occur in a
black image at intervals of
95mm, or black spots occur
elsewhere, the OPC drum is
damaged or foreign sub-
stance is stuck to the surface.
3. If a black and white or
graphic image is partially bro-
ken at irregular intervals, the
transfer roller's life has been
expired or the transfer voltage
is abnormal.
1. Poor appearance of the
print cartridge.
(1)Check the damage to label
and whether different materi-
als are used.
(2)Check the appearance of
parts of the print cartridge,
such as frame, hopper.
2. Unclean and rough print-
outs.
(1)Check whether foreign
substance 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
Image Quality
Solution
1. In case of 1 above -Run OPC
Cleaning Mode Print 4-5 times
repeatedly to remove, refer to
GP 5. Especially check foreign
substance on the OPC surface,
then remove them with a clean
gauze moistened with IPA (Iso-
propyl Alcohol) not to damage
OPC if necessary. Never use
usual alcohol.
2. In case of 2 If they are not
disappeared by running OPC
Cleaning Mode Print 4-5 times.:
at intervals of 38mm -Replace
the print cartridge.: at intervals
of 95mm - Remove foreign sub-
stance.: Broken image -Replace
the print cartridge according to
carelessness.
3. In case of 3 -Exchange the
transfer roller because the life of
the transfer roller in use has
been expired. (Check the trans-
fer voltage and readjust if differ-
ent.)
1. In case of 1
(1)If there is an evidence of dis-
assembling the print cartridge.
(2)If materials other than normal
parts of the print cartridge are
added or substituted.
2. In case of 2 -If there are any
abnormality in connection with
the situation of 1.
(1)It occurs when the print car-
tridge is recycled over 2 times.
(2)If toner nearly being expired
are collected to use, it is judged
as the recycled print cartridge.
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