Paper Wrinkle; Checking Nip Width - Canon imageRUNNER ADVANCE 8105 Series Service Manual

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Technology > Fixing > Servicing > Troubleshooting
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Troubleshooting
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Paper wrinkle

<Location>
Fixing Roller, Pressure Roller
<Cause>
Right after the startup, temperature is different between the center and the edge of the
Fixing Roller (temperature: center > edge).
Because a slippery solid black image does not match to the nip shape when it is fed, the
center of paper is pulled toward the feeding direction, causing paper wrinkle.
<Condition>
Timing: Approx. 20 sheets immediately after the startup first time for the day
Paper size: Paper size larger than B4
<Field Remedy>
the service mode "Setting of paper wrinkle prevention mode" default setting is ON.
if paper wrinkle is not improved, change the service mode value.
COPIER>OPTION>BODY>FX-WNKL
[Setting values]
0: OFF
1: Normal(Default value)
2: Level 1
3: Level 2
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Technology > Fixing > Servicing > Troubleshooting
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Checking nip width

In the case of paper wrinkle or fixing failure, check that the fixing nip width is within the
specified range. Note that the fixing nip width of this equipment cannot be adjusted in the
field.
1) Print approx. 20 sheets of A4 size paper.
2) Make a solid black print (setting value: 7) in COPIER > TEST > PG > TYPE.
3) Set the output of step 2 on the Multi-purpose Tray while placing the printed side down.
4) COPIER > Function > FIXING > NIP-CHK
A sheet is stopped once in a state held by the Fixing Nip area, and is delivered approx. 20
seconds later.
5) Measure the nip width of delivered sheet.
If the nip widths are as follow it is judged as normal: 7.0 to 8.0 mm at the center (b), and
difference between front(a) and rear(b) is within 0.5 mm.
In the case of failure, check if there are any damaged parts (*), and replace the damaged
parts (if any).
* Gear, Bearing, Fixing Roller, Pressure Roller and Fixing Assembly
Edge
Center
Edge
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Nip width
a
b
c
Paper feed direction
F-2-152 F-2-152
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