Measurement And Adjustment; Mechanical Adjustment - Canon CLBR 460ps Service Manual

VII. MEASUREMENT AND ADJUSTMENT
A. Mechanical Adjustment
1. Checking the nip width of the lower fixing roller
The fixing unit in the printer is not designed to allow adjustment of the pressure (nip width);
however, the incorrect nip width can cause fixing problems. If the nip width is not within the
specification, replace the fixing unit.
Follow the procedures below and check the nip width.
1) Make an all-black print of A4 size using a toner cartridge, and take the print to the cus-
tomer's site. (Output all black print by operating external device.)
2) Place the all-black print in the cassette of the printer with the printed side facing down.
3) Select the face-up delivery.
4) Press the test print switch.
5) When the leading edge of the print emerges at the face-up tray, turn OFF the printer and
wait for about 10 seconds. Then, turn the power switch ON again. Allow the print to be
completely delivered from the printer.
6) Measure the width of the glossy band across the paper and check that it meets the require-
ments as shown in Figure 4-7-1:
• Center (a): 9.2±1mm
• Difference between right/left and center (b-a, c-a): between 0mm and 1.5mm
• Difference between right and left side (b-c): 1.0mm or less
Feed direction
15mm
c
Center of the paper
a
b
15mm
Figure 4-7-1
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