Canon Vizcam 1000, 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
6. Grid Test Print (PGTYPE=06)
Use the grid test print to check color displace-
ment, right angles, and straight lines.
To select a color, use service mode:
TEST>DENS - Y/M/C/K.
a. Color Displacement
If color displacement is noted, suspect a fault in
the transfer belt.
Color displacement on this test print does not
necessarily mean color displacement on regular
copies because of black text processing. The
mechanisms are normal as long as color displace-
ment is not noted on regular copies. (Use this test
to find out the location of displacement and the
color if color displacement is noted on regular cop-
ies.)
b. Right Angles/Straight Lines
If a fault is noted in relation to right angles or
straight lines, suspect a displaced laser beam or a
fault in the beam detection mechanism.
Figure 7-307