Faulty Registration; I-14. Poor Fixing - Canon LBP-CX Series Service Manual

Cause Step Check Result
Measure
( 4) Check whether there are any
YES Remove the obstacle(s), or clean
obstacles in the area where
with a brush (CK-0315).
th_e beam passes through. Are
there any?
Dustproofing glass 5 Is the dustproofing glass dirty? YES
Remove the laser/scanner unit.
(Refer to Figure 2-9 in
Clean it with lint-free paper. Paper
CHAPTER 2)
dust should not be left.
(See IV, A in Chapter 4 about unit
disassembly.)
1-13 Faulty registration
Cause Step Check Result Measure
Feed rollers 1 Has either guide :;pring (at ends of YES Reinstall
(registration shutter feed roller shaft) come off?
ass'y)
Print paper 2 Is the leading edge of paper curled YES Straighten the edge before using, or
excessively? change paper.
3 Is manufacturer-approved paper
NO
Check whether the paper
is
manu-
being used?
facturer-approved. Advise the
customer to use manufacturer-
approved paper.
DC controller PCB 4 Is the problem solved if the DC YES
Finished
controller PCB is replaced?
1-14 Poor fixing
LP
Cause Step Check Result Measure
Print paper
1 Is manufacturer-approved paper
NO
Advise the customer to use manu-
used?
facturer-approved paper.
Fixing ass'y 2 Are the upper and the lower rollers
YES Replace the rollers.
worn?
3 Is the nip width correct?
NO
Replace the lower roller. If the
(Correct values are 2 - 3 mm at
image does not improve after replac-
center, and a difference within
ing the roller, replace the pressure
0.5 mm at both edges. See II. C. springs.
2 in this chapter.)
7-22
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BY CANON INC. CANON LBP-CX SERIES REY.2 JULY 1985 PRINTED IN JAPAN (IMPRIME AU JAPOllJ