Adjusting The Lower Roller Pressure (Nip) - Canon NP6251 Service Manual

 
CHAPTER 11 TROUBLESHOOTING

3. Adjusting the Lower Roller Pressure (nip)

The nip width must be as indicated in Table 11-203. Otherwise, adjust it by turning
the pressure adjusting nut.
Note:
a and c represent points 10 mm from both ends of copy paper.
a. Taking Measurements
Wait 15 min after the end of the machine's warm-up period; then, make 20 A4 copies
before taking measurements.
1) Select A3.
2) Open the copyboard cover.
3) Start service mode (
4) Press the user mode key ].
• A3 copy paper is picked up and discharged as shown in Figure 11-246 ready for
measurement.
11-40
COPYRIGHT © 1997 CANON INC.
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Feeding
direction
Figure 11-246
Dimensions
b
|a-c|
*Take measurements when both upper
and lower rollers are adequately warm.
Table 11-203
), and select 'NIP' (nip adjustment).
4
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
c
b
Center of
paper
a
Measurement*
7.3±0.5mm
0.5 mm or less