Horizontal Stripe (Ff Activation) Test Print (Pgtype=10) - Canon 1000 Service Manual

8. Horizontal Stripe (FF activation)
Test Print (PGTYPE=10)
Use the horizontal stripe test print to check the
dark area density of each color, balance between
colors, and white lines (development).
a. Dark Area Density of Each Color and
Balance between Colors
The density must not be appreciably light.
If a mono color copy is light, suspect a fault in
the developer or the transfer blade.
If the density is light for all colors, suspect a
fault in the up/down movement of the transfer belt.
b. White Lines (development)
For instance, if white lines are noted in the cyan
area of the copied image, suspect a fault in the de-
veloping assembly for cyan.
COPYRIGHT © 2001 CANON INC.
Figure 7-309
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
c. Uneven Density between Left and Right
If uneven density occurs between left and right
for all colors, suspect dirt on the butting block, and
a fault in the height of the primary charging wire.
d. Image Position (left/right)
If the position of the cassette holder or the set-
ting of 'REG-X, Y' is wrong, the registration be-
tween the paper and the image (left/right) will have
a discrepancy, eliminating the non-image width,
possibly causing stray toner and soiling the inside
of the machine.
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