Controller Test Print - Canon MF735C Series Service Manual

3. An engine test print is executed, and the test pattern as shown below is printed on one side or both sides of a sheet
of paper.

Controller test print

The following test print types are available with this machine, and you can check for failure of an image with a circle 'Yes' described
in the image check items in the table below. When no failure is found in the test print in normal output mode, it can be caused in
PDL input or Reader.
The image of the test print is generated by the Main Controller PCB.
PG TYPE Pattern
TYPE
dation
0-1 For R&D use
2 Color chart
3 For R&D use
4 Rainbow chart
(vertical scanning
direction, A4)
5 Rainbow chart
(horizontal scan-
ning direction, A4)
6 Color grid (A4)
7 Rainbow chart
(vertical scanning
direction, LTR/
LGL)
8 Rainbow chart
(horizontal scan-
ning direction,
LTR/LGL)
9 Color grid (LTR/
LGL)
10 16 gradations
11 17 gradations of
Y/M/C/Bk/R/G/B
12 Halftone
Gra- Fog- Trans Black
ging fer line
Fault (Color
line)
Yes Yes
Yes
Yes Yes
Image check items
White Un- Un- Right
line even even Angle
Den- Den-
sity sity at
the
Front /
Rea
Yes
Yes
Yes Yes
Yes Yes Yes
204
7. Troubleshooting
Straig Color Color Ghost Den-
ht dis-
Lines place-
ment
Yes
Yes
Yes
Yes Yes
Yes
Yes
Yes Yes
White
sity spots