Full Color 17-Gradation (Ymcbk+Rgb+Gray) Test Print (Pgtype=14) - Canon CLC5000 Service Manual

CHAPTER 5 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.3.9 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 CMYBk,
and gradation of RGB mono, and fogging.
a. Gray Balance
Check to make sure that each color is reproduced at an even density over the gray scale.
To make adjustments, use the contrast potential.
b. Gradation
Check gradation of CMYBk 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
photosensitive drum; or, the laser may not be adjusted correctly.
C, M, Y
gray scale
Y
5-80
C, M, Y, Bk
gray scale
C M
F05-303-08
COPYRIGHT © 2001 CANON INC.
R G B
2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001
Gradatoin of Bk
(gray scale)