Canon CLC1000, Service Manual

Page: 356 / 627

8. Horizontal Stripe (FF activation)
Test Print (PGTY
0)
Use the horizontal stripe test print to check the
dark area density of each color, balance between
colors, and white lines (development).
a. Dark Area Density of Each Color and
Balance between Colors
The density must not be appreciably light.
If a mono color copy is light, suspect a fault in
the developer or the transfer blade.
If the density is light for all colors, suspect a
fault in the up/down movement of the transfer belt.
b. White Lines (development)
For instance, if white lines are noted in the
cyan area of the copied image, suspect a fault in
the developing cyan.
c.
Uneven Density between Left and Right
uneven density occurs between left and right
for all colors, suspect dirt on the butting block, and
a fault in the height of the primary charging wire.
d. Image Position (left/right)
If the position of the cassette holder or the set-
ting of ‘REG-X, Y’ is
wrong, the registration
between the copy paper and the image (left/right)
will have a discrepancy, eliminating the
image width, possibly causing stray toner and
soiling the inside of the machine.
mm
4
Figure 3-1112
mm
CANON
3429