Horizontal Stripe Test Print (Pg>Type=10, 16) - Canon CLC 1120 Service Manual

2. Horizontal Stripe Test Print (PG>TYPE=10, 16)
Use a horizontal test print to check the density of a dark area of each color, balance among
colors, and white lines in reference to development.
a. Density of a Dark Area of Each Color and Balance of Colors
The density must not be appreciably low (light).
If the density is too low (light) for a single color, suspect a fault in the developing assembly of
that color.
If the density is too low (light) for all colors, suspect a fault in the laser system.
b. White Lines in Development
If white lines are noted in a cyan area only of the copy, suspect a fault in the cyan developing
assembly.
c. Uneven Density between Left and Right
If uneven density between left and right is noted for all colors in the same way, suspect a fault
in the height of the primary charging wire. If it is noted for a specific color only, suspect dirt on
the developing roll and butting block.
d. Left/Right Image Position
If the position of the cassette holder or ADJ-X, Y is wrong, the image position on the drum and
that of copy paper will not match, eliminating the non-image width.
Such a condition can cause toner to fly astray, soiling the inside of the copier.
COPYRIGHT © 1999 CANON INC.
Figure 13-303
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
2 ± 1.5 mm
8 ± 1.5 mm
13-57