Canon 1000S, Service Manual

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COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
8. Others
When a machine is brought from a cold to a
warm place in winter, its inside can start to develop
condensation, leading to various problems.
a. Condensation on the original illuminating sys-
tem or the laser exposure system (glass, mir-
ror, lens) causes light or dark images.
b. Condensation in the charging system can
cause leakage.
c. Condensation in the pick-up system or on the
feeding guide plate can cause feeding prob-
lems.
If condensation is noted, dry wipe the part or
leave the machine powered for 10 to 20 minutes.
If uneven density (difference in den-
sity between front and rear), light im-
ages, or fogging is noted, perform the
“Image Adjustment Basic Procedure”
first.
B. Standard Image
What is referred to as a “standard image” is an
image in which the gray scale, color patches, and
3-color gradation scale are as follows when the
Canon CA-1 Test Sheet is copied in four full colors.
1. Gray Scale
No. 1 (dark area) is more or less black and the
density grows lighter with No. 8 (light) area being
barely visible and No. 9 being white.
The color of the halftone area is more or less
gray but is not appreciably yellowish or bluish.
2. Color Patches
Each color can be distinguished and is not ap-
preciably different from its original color (Test
Sheet).
3. Photo
The color balance is not appreciably different
from the original.
4. 3-Color Gradation Scale
No. 8 is barely visible with No. 9 being white.
5. Halftone Band
The color is not appreciably different from the
original (Test Sheet). Further, the band as a whole
is not appreciably uneven*, and the color does not
differ appreciably between left and right.
* Moire, if found, may be ignored.