Canon CLC 1120 Service Manual page 617

CHAPTER 13 TROUBLESHOOTING
No. Color/location (A3)
1 All colors; 0 to 20 mm from
leading edge
2 M: near 105 or 160 mm from
the leading edge
C: near 50 or 105 mm from
the leading edge
Y: near 50 mm from the
lading edge
K: near 150 mm from the
leading edge
3 All colors; 390 mm to 410
mm from the leading edge
4 Non-specific color; non-
specific position
Reference:
ADJ-J in service mode is designed to change the distance (14mm) between the scanner start
position and the leading edge of an original, used to determine the time needed to accelerate
the scanner before it reaches a specific speed.
If too short, displacement along the leading edge will occur; you may increase the setting,
however, as much as you want before such displacement starts to occur.
Keep in mind that, if the setting exceeds 190, scanning for the second and subsequent colors
will be out of keeping, causing error images.
13-90
COPYRIGHT © 1999 CANON INC.
Cause
The black text recognition
mechanism has failed because
of vibration of the No. 1/No. 2
mirror mount.
The impact occurring when
the developing assembly is
locked in position rocks the
No. 1/No. 2 mirror base,
displacing the latent image on
the photosensitive drum.
The scanner cable is twisted.
The No. 1/No. 2 mirror base
vibrates because of dust, or
the scanner cable is frayed.
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
1. Increase the setting of
ADJUST>ADJ-XY>ADJ-
J in service mode. (See
Reference.)
2. Increase the tension of the
timing belt of the original
scanner motor.
Check the developing roll and
the developing assembly
locking assembly.
Check the CCD and the CCD
base.
Check the contact between
each mirror base and the rail.
Remove the screws used to
keep the No. 1 mirror base to
the cable; then, move the No.
2 mirror base slowly back and
forth. Apply lubricant (CK-
0551) to the scanner cable.
Clean the scanner cable.
Replace the scanner cable.