Canon iR C6800 Series, Service Manual

Page: 924 / 1404

Chapter 13
13-52
13.3.2.6.4 Oil Lines in Vertical Direction
0005-6054
Cause
When paper of the same size is used continuously, the area of the fixing roller coming into contact with the edge of
paper tends to wear out, developing a dent. The dent in turn tends to collect oil from the belt, resulting in oil lines
when paper of a larger size is used.
This symptom is most conspicuous on th 1st large size sheet, growing lighter and disappearing after several sheets.
The symptom, on the other hand, tends to occur more readily when the fixing roller starts to deteriorate after long
use (100,000 sheets or more).
EX: if A4 is used normally, and A3 extralength paper is used as an exception:
Field Remedy
Replace the fixing roller/pressure roller.
13.3.2.6.5
Soiling as Dots at Drum Intervals
0005-9972
Cause
When the transfer cleaning drive assembly is removed, the force of the pressure spring causes the ITB cleaning blade
to butt against the intermediate transfer belt. The contact in turn will cause the coating of the blade to stick to the belt.
The coating will then be pressed against the photosensitive drum under the force of the primary transfer roller. When
the photosensitive drum cleaning blade starts to wear, it can fail to collect the coating, and the coating will likely
appear on the prints in the form of dots.
Field Remedy
If this symptom is noted, go through the following flow of work to correct it:
F-13-39
*1: To set forced photosensitive drum cleaning (at poweron), perform the following:
1) Set "1" the following service mode item: COPIER>OPTIONAL>BODY>DCLNTM.
2) Set "1" to the following service mode item: COPIER>OTPN>BODY>PAIRFAN.
Start
Perform step 1.
Perform step 2.
Is the symptom noted?
No
Yes
Set forced photosensitive
drum cleaning (*1).
Set forced photosensitive
drum cleaning (*1).