Canon NP6320 Service Manual page 192

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CHAPTER 10 TROUBLESHOOTING
14. Adjusting the Fixing Assembly Roller Pressure (adjusting the nip width)
The nip width should conform to the dimension shown in Table 10-201. Adjust the nip width
with the bolt when it is out of standard.
Note:
a and c are the dimensions of the 10 mm position at both edges of the copy paper.
Dimension
• Measuring the Nip Width
If the rollers are cool, leave the copier ON, keep the Wait indicator ON for 15 minutes; make 20
copies, and then measure the nip width.
Measuring Procedure
1) Open the copyboard cover and make an A3 size solid black copy.
2) Set the solid black copy to the multifeeder.
3) Select the service mode C13.
3-1) Detach the VR cover from the rear of the left cover.
3-2) Press the service switch (SW300) on the DC controller PCB.
3-3) Select the service mode C13 using the 10-key or the zoom key.
4) Press the Sort/Group key.
• The solid black paper is automatically picked up from the multifeeder.
• Then the solid black paper is stopped at the fixing roller and, after a specific period, is deliv-
ered.
5) Measure the width of the toner portion which has a glossy surface, as shown in Figure 10-220.
6) Press the service switch (SW300) to exit from the service mode.
10-14
Direction of
feed
A3 size
Figure 10-220
Measure after the upper and lower rollers have
been adequately heated.
b 4.0 ±0.5 mm
|a-c| 0.5 mm or less
Table 10-201
COPYRIGHT © 1999 CANON INC.
c
b Center of
copy paper
a
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)