User Guide

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Canon Service Bulletin COPIER
Issued by Canon Europa N.V.
Location:
Service Manual (troubleshooting: vertical lines caused by faulty ITB cleaning)
Subject:
Updating the Service Manual
Background:
The cause of "vertical lines in color halftone images" has been identified, and the text description in the Service
Manual is now being updated. (The revised text and additions are indicated herein in blue.)
Cause:
As the fixing web is used more and more (decrease in its remaining length), there is necessarily an increase in the
amount of oil applied to the fixing roller. Moreover, in a low-temperature environment (e.g., early in the morning),
the oil tends to be viscous, making it more likely to be applied to the fixing roller unevenly.
When prints are made in this condition, the oil will more readily transfer from the fixing roller to paper. In the case
of a double-sided print, the oil deposited when printing occurs on the 2nd side will transfer to the ITB and lower
transfer efficiency, ultimately causing vertical lines in the image.
Field Remedy:
When the foregoing symptom is noted, advise the user to perform the following:
- Execute the following user mode item: adjust/clean>clean roller.
If the execution of this user mode item does not bring about satisfactory results, repeat it.
Note:
This user mode item will activate the black band sequence to increase the cleaning performance of the blade, thereby
removing the oil from the ITB more efficiently. The term "black band sequence" refers to a series of operations in
which a band of black toner is deposited on the ITB and the cleaning blade is operated to collect the toner.
Discussion:
The symptom in question tends to be more conspicuous under the following conditions:
- When double-sided printing is performed immediately after the power has been turned on (before the 5th print; e.g.,
first thing in the morning).
Model:
iR C6800C
iR C6800CN
Ref No.:
iRC6800-002
(F2-T01-0M3-10003-01)
Date:
30-04-04