The Output Is Too Light (Solid Black Area); The Output Is Too Light (Overall, Considerably) - Canon iR105 Service Manual

CHAPTER 6 TROUBLESHOOTING

3.3.2 The output is too light (solid black area)

3.3.3 The output is too light (overall, considerably)

Copy paper
1) Try paper fresh out of package. Is the problem corrected?
YES: 1. The paper may be moist. Advise the user on the correct method
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2) Perform the Image Adjustment Basic Procedure. Is the problem
YES: End.
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3) Turn off the power switch in the middle of copying, and open the
NO:
Transfer (fault)
4) Is the transfer/separation charging assembly fully fitted?
NO:
5) Make copies by varying the setting of the following in service mode
YES: End. (The problem is caused by the environment.)
NO:
Transfer (faulty)
Transfer guide
6) Measure the resistance between the transfer guide and the base
YES: Check to find out if the transfer guide is in contact with a metal
DC controller PCB
NO:
6-72
of storing paper.
2. Advise the user that using non-recommended paper may not
bring about the best results.
corrected?
front cover. Is the toner image on the surface of the photosensitive
drum before transfer more or less normal?
The cause is before transfer. Go to step 8.
Fit the charging assembly fully.
between '1' and '3' to suit the environment:
COPIER>OPTION>BODY>FUZZY. Is the problem corrected?
Se the settings of 'FUZZY' back to '1', and go to the next step.
(metal portion) for the feeding assembly using a meter. Is the elec-
trical resistance 0 Ω Ω Ω Ω Ω ?
portion (e.g., side plate of the feeding assembly).
Check the high-voltage transformer (HVT) and the DC controller
PCB.
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001