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CHAPTER 13 TROUBLESHOOTING
13-68
COPYRIGHT
©
1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
2 The copy is too light (solid black area).
3 The copy is too light (entire area, considerably).
Action
1. The paper may be
moist. Instruct the
user on the correct
method of storing
paper.
2. Inform the user that
the use of paper not
recommended by
Canon may not
produce the best
results.
End.
Go to step 8. (The
cause is before
transfer.)
Fit the charging
assembly securely.
End. (The cause is in
the environment.)
Set FUZZY back to '1',
and go to the next step.
Check to make sure
that the transfer guide
is not in contact with a
metal area of the
feeding assembly (e.g.,
side plate).
Check the high-voltage
transformer (HVT) and
the DC controller PCB.
Check the developing
assembly pressure
plate to see if it
mounted correctly.
Fit the charging
assembly securely.
Cause
Copy paper
Transfer faults
Pre-transfer
charging
assembly
Checks
Try copy paper fresh out of package. Is
the problem corrected?
Perform the Image Adjustment Basic
Procedure. Is the problem corrected?
Turn off the power switch in the middle of
copying operation, and open the front
cover. At this time, is the toner image on
the surface of the photosensitive drum
before transfer normal?
Is the transfer/separation charging
assembly fitted securely?
Set the following to '1' through '3':
COPIER>OPTION>BODY>FUZZY in
service mode. Is the problem corrected?
Measure the resistance between the
transfer guide and the plate (metal) of the
feeding assembly. Is it 0 W ?
Is the developing assembly fitted
securely? Are the rolls of the developing
assembly in firm contact with the
photosensitive drum?
Is the pre-transfer charging assembly
fitted securely?
Step
1
2
3
4
5
6
7
8
Yes/No
YES
YES
NO
NO
YES
NO
YES
NO
NO
NO
Developmentfault
Transfer fault
Transfer
guide
DC
controller
PCB
Developing
assembly
(position)