Canon CLC 1130, Service Manual

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COPYRIGHT © 2002 CANON INC. CANON CLC1100/1130/1150/1160/1180 REV.1 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 13 TROUBLESHOOTING
7. Grid Test Print (PG>TYPE=6)
Use a grid test print to check color displacement, angles, straight lines.
a. Color Displacement
If color displacement is noted, suspect a fault on the transfer drum sheet.
Even if you notice color displacement on a test print, you may not find it on a regular copy
because of black text processing. The copier is normal if regular copies do not show color
displacement. Use test prints if regular copies show color displacement, as when finding out
the position of displacement and or when identifying the color.
b. Angles and Straight Lines
If faults are noted for right angles and straight lines, suspect displacement of the laser beam and
a fault in the beam detection mechanism.
1. You can generate printouts for each developed color using
COPIER>TEST>PG of service mode and selecting the following: COLOR-
Y, COLOR-M, COLOR-C, COLOR-K.
2. To change the density of test prints, use TEST>PG>DENS-Y, M, C, K of
service mode.
Figure 13-308 COLOR-M Set to '1'