Canon Vizcam 1000, Service Manual

Page: 500 / 840

7-64
COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
9. Full Color 17-Gradation
(YMCBk+RGB+gray) Test Print
(PGTYPE=14)
Use the full-color 17-gradation test print to
check gray balance, gradation of YMCBk, and gra-
dation of RGB mono, and fogging.
a. Gray Balance
Check to make sure that each color is repro-
duced at an even density over the gray scale.
To make adjustments, use the contrast poten-
tial.
b. Gradation
Check gradation of YMCBk and RGB mono and
difference in density.
c. Fogging
If fogging is noted in the white area, suspect a
fault in the developing assembly or the photosensi-
tive drum; or, the laser may not be adjusted cor-
rectly.
Figure 7-310