Measurement And Adjustment - Canon LBP-1210 Service Manual

CHAPTER 4
VII. MEASUREMENT AND ADJUSTMENT
A. Mechanical Adjustment
1. Checking the nip width of the lower fixing roller
The fixing unit is not designed to allow 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 cartridge, and bring the print to the cus-
tomer's site.
2) Place the all-black print in the multi-purpose tray of the printer, with the printed side facing
down.
3) Select face-up delivery by shifting the delivery switching lever downward.
4) Press the test print switch.
5) Turn OFF the printer when the leading edge of the print emerges at the face-up tray. Open
the rear cartridge cover and take out the print about 60 seconds later.
6) Measure the width of the glossy band across the paper and check that it meets the require-
ments as shown in Figure 4-10-1.
• Center (a): 6.0 mm to 7.6 mm
• Right and left: 6.0 mm to 7.6 mm
• Difference between right side and left side (|b-c|): 1.0 mm or less
• Difference between right/left side and center (b-a, c-a): 1.0 mm or less
B. Electrical Adjustment
This printer's electrical system does not require adjustment.
4 - 20
c
Paper feed
direction
Figure 4-7-1
Center of A4
size paper.
a
b