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I-11. White Horizontal Lines Or Other Shapes On A Black Print; I-12. Thin Vertical White Lines Or Stripes (paper Feed Direction) - Canon LBP-CX Series Service Manual

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1-11 White horizontal lines or other shapes on a black print
Cause
Step
Check
Damp print paper
l
Is manufacturer-approved paper
being used?
2
Is paper damp?
1-12
Thin vertical white lines or stripes (paper feed direction)
Cause
Step
EP cartridge
Fixing roller cleaner
2
felt
Transfer corona ass 'y,
3
EP cartridge
Laser beam-blocking
shutter
4
Check
Are white stripes reproduced?
Is the fixing roller cleaner felt
dirty?
Do prints improve after the
transfer corona wire is cleaned?
To check whether the beam
porthole is dirty, using the
following procedure.
( 1) Open the printer (raise the
upper half).
(2) Open the front door. Take
the EP cartridge out of the
printer.
(3) Press the levers (marked "A"
in the figure of the right)
toward the laser beam
shutter. The shutter opens
and the beam porthole can be
seen.
Result
Measure
NO
Check whether paper
is
manufac-
turer-approved. Advise the customer
to use manufacturer-approved paper.
Explain that poor paper causes poor
quality prints.
YES
Replace the paper. Show the
customer the correct method of
storing paper.
Result
Measure
YES
If the EP cartridge status indicator is
not red, rock the cartridge to spread
the toner evenly (See Fig. 5-6 in Ch5.)
If the indicator is already red, tell the
customer that all the toner has been
used.
YES
Replace the fixing roller cleaner
felt.
YES
Finished
NO
Replace the EP cartridge.
000000
COPYRIGHT
©
BY CANON INC. CANON LBP·CX SERIES REY.2 JULY 1985 PRINTED Ill JAPAN (IMPRIME AU JAPONI
7- 21

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