Adjusting The Lower Roller Pressure (Nip Width); Adjusting The Lower Roller Pressure (Nip); External Delivery Roller; Removing The External Delivery Roller - Canon ImageRunner iR8500 Series Service Manual

Chapter 10
[1]
[2]
5) Remove the lower roller [3] from the fixing assembly, and remove the
E-rings [4] and the bearings [5] from both front and rear.
[3]

10.5.3.2 Adjusting the Lower Roller Pressure (nip width)

/ iR85+ / iR8070
The nip width is correct if it is as indicated. Otherwise, adjust it using a
pressure adjusting nut.
(feeding
direction)
Take measurements when both upper/ lower roller are
sufficiently heated.
b = 9.0±0.5mm
|a-c| = 0.5 mm or less
a and c are points 10 mm from both edges of paper.
10-24
[1]
F-10-46
[4]
[5]
F-10-47
0008-8436
c
b
Middle
of paper
a
F-10-48
a. Generating Output for Measuring the Nip Width
Before measuring the nip width, wait for 15 min after the end of the
machine's warm-up period and make 20 A4 prints:
1) Place A3 paper in the manual feed tray.
2) Make the following selections in service mode to generate output:
COPIER>FUNCTION>FIXING>NIP-CHK.
The A3 paper will be picked up and a print above figure will be
delivered.

10.5.3.3 Adjusting the Lower Roller Pressure (nip)

iR105i/iR105+ / iR9070
The nip width must be as indicated in figure; if not, adjust it using the
pressure adjusting nut.
Feed
direction
a and c are points 10 mm from both edges of paper.
Dimension Measure with upper and lower
rollers fully heated
b 200 V: 9.0 -/+ 0.5 mm, 208/230 V:
10.0 -/+ 0.5 mm
| a-c | 0.5 mm or less
a. Generating Output for Nip Width Measurement
Wait for 15 min after the copier ends its warm-up period; make 20 A4
copies, and measure the nip.
1) Place A3 copy paper in the manual feed tray.
2) Make the following selections in service mode to generate output:
COPIER> FUNCTION> FIXING> NIP-CHK.
The A3 paper will be picked up, and a copy like the one shown in figure
will be delivered.

10.5.4 External Delivery Roller

10.5.4.1 Removing the External Delivery Roller

iR105i/iR105+ / iR9070
1) Remove the fixing assembly.
2) Remove the 3 screws [1]; then, while opening the upper delivery
assembly [2], remove the delivery roller guide [3].
0008-4621
c
b
Middle
of paper
a
F-10-49
T-10-15
0007-2919