Measurement And Adjustment; Mechanical Adjustment - Canon LBP-1120 Service Manual

VII. MEASUREMENT AND ADJUSTMENT
A. Mechanical Adjustment
1. Checking the Nip Width of the Pressure Roller.
The fixing unit is not designed to allow the adjustment of the pressure (nip width); however, the incorrect nip width can
cause fixing problems.
Follow the procedures below to check the nip width:
1) Make an all-black print of A4 size using an EP-22 cartridge, and bring the print to the customer's site.
2) Place the all-black print in the multipurpose tray of the printer, with the printed side facing down.
3) Select faceup delivery by turning the delivery switching lever down.
4) Press on the test print switch.
5) Turn OFF the printer when the leading edge of the print emerges at the faceup tray. After 10 seconds from tuning
OFF the printer, open the cartridge cover and take out the print.
6) Measure the width of the glossy band across the paper and check that it meets the requirements as shown in Table
4-7-1.
Paper feed
direction
Figure 4-7-1
B. Electrical Adjustment
This printer's electrical system does not require adjustment.
c
Center of A4
size paper.
b
a
CHAPTER 4
Table 4-7-1
Dimensions
a,b,c 4 to 6 [mm]
a - c 0. 5 [mm] or less
a - b 1. 0 [mm] or less
b - c 1. 0 [mm] or less
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