Wrapping Around The Pressure Roller / Oil Traces / Separation Claw Traces - Canon iR C6800 Series Service Manual

13.3.3 Faulty Feeding
13.3.3.1 Wrap
13.3.3.1.1 Wrapping Around the Pressure Roller / Oil Traces / Separation Claw Traces / Wrinkle
Traces
Description
wrapping around the pressure roller occurs when fixing on the 2nd side of a double sided print is under way
difference in color caused by oil along the leading edge of the 1st side of a double sided print (wavy, unevenness in
gloss) [1]
traces of separation claws along the leading edge of the 1st side of a double sided print (lines opposite the separation
claws) [2]
traces of wrinkles of the pressure roller on the 1st side of a double sided print [3]
However, of the foregoing, the symptom may not occur or may not be noticeable because of the degree of the cause.
The symptom tends to occur more readily for the following:
paper of 80 g or less is used on a non Japanese machine
the fixing roller or the pressure roller has deteriorated (tending to occur more readily after 100,000 prints)
a solid image (mono or 2 color) is made (with the symptom being absent in the case of a mono solid image)
double sided prints are made
Cause
As the pressure roller is used more and more, the rubber layer starts to soften, gradually increasing the nip width and,
as a result, causing the symptom to occur more readily.
Field Remedy
Change the setting
COPIER>OPTION>BODY>FXLW TMP.
Memo:
1. The effects are greater when '2' is set; however, a drop in latitude in fixing will be a trade off when heavy paper is
used.
2: Be sure to return the setting to its initial value after replacing the fixing roller or the pressure roller. If the user
seldom uses heavy paper and is likely to complain each time the roller starts to wear out, the setting need not be
changed back to its initial value.
3. if the fixing roller or the pressure roller has been used for more than 150,000 prints, replacement of the roller is
recommended.
Memo:
The pressure roller temperature control target is changed as follows to suit the setting selected in service mode:
1: 160 deg C
2: 150 deg C
Note 1:
The effects will be larger if it is set to '2'; however, a drop in latitude of fixing will be a trade off when heavy paper
is used.
of the following from '0' (default) to '1' or '2' in
Chapter 13
0005-6299
service mode:
13-63