Adjustments; Standards And Adjustments - Canon LBP-2000 Service Manual

VII. STANDARDS AND ADJUSTMENTS
A. Making Mechanical Adjustments
1 . Checking the pressure (nip) of the pressure roller
Caution: In the steps that follow, you will be asked to turn off the power switch while the Printer
is in operation. Be sure to remove the option hard disk, if installed, before starting the
steps; otherwise, turning off the power can damage the disk.
The Printer's fixing assembly is not designed to allow adjustment of the nip; nevertheless, fixing
faults can occur if the nip is not appropriate.
Check the nip as follows:
1) Prepare an A4 or LTR solid black sheet using an EP cartridge, and take it to the field.
2) With the solid black side of the sheet facing upward, select a source of paper, and set the sheet
inside.
3) Press the Test Print switch.
4) Turn off the power switch as soon as the leading edge of the sheet moves to the delivery tray.
In about 10 sec, take out the sheet from the Printer.
5) Measure the width of the area with shiny toner (Figure 4-7-1), and check to make sure that it
is as indicated:
• Middle (a):
• Left/right (b, c):
• Difference between left and right (|b - c|):
• Difference between edge and middle (b - a, c - a):
Feed direction
10mm
Middle of paper
b
Figure 4-7-1
2.9 to 4.6 mm
3.5 mm or more
0.5 mm or less
0.5 mm or more
10mm
a
c
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