Adjustment When Replacing Parts - Canon imageRUNNER 2520 Series Service Manual

Outline

Adjustment when replacing parts

This section describes adjustment required in field service works when replacing parts.
The parts are classified by function into the following 3 blocks.
Category Replacing parts
Scanning CIS Unit
System
Copyboard glass
ADF reading glass
Controller Main controller PCB
System
DC controller PCB
RAM PCB
2
Laser Exposure Laser scanner unit
System
Image position adjustment
This section describes procedures when adjusting basic image position (image margins,
nonimage area, etc).
Category
Margin Along the Single-sided copy: 2.5 ± 1.5 (mm)
Leading Edge Double-sided copy: 2.5 ± 2.0 (mm)
0 2 4 5
2-2
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Reference
"Action to Take after Replacing the CIS Unit"(page
2-3).
"Action to Take after Replacing the Platen
Glass"(page 2-3).
"Action to Take after Replacing the ADF Scan
Glass"(page 2-4).
"Action to Take after Replacing theMain Controller
PCB"(page 2-4).
Refer to page 2-4
"Action to Take after Replacing the RAM"(page 2-5).
"Action to Take after Replacing the Laser Scanner
Unit"(page 2-5).
Item
"Margin Along
the Leading
Edge"(page 2-5).
2.5+/-1.5mm
(2nd side of double-sided copy
: 2.5+/-2.0mm)
6 8 10 12 14 16 18 20
Category
Left Image MarginSingle-sided copy: 2.5 ± 1.5 (mm)
Leading Edge
Non-Image Width
T-2-1 T-2-1
Reference
Left Non-Image
Width
Item
Double-sided copy: 2.5 ± 2.0 (mm)
2.5+/-1.5mm
(2nd side of double-sided copy:
2.5+/-2.0mm)
0
2
4
5
6
8
10
Single-sided copy: 2.5 ± 1.5 (mm)
Double-sided copy: 2.5 ± 1.5 (mm)
2.5+/-1.5mm
(2nd side of double-sided copy:
2.5+/-1.5mm)
0 2 4 5 6 8 10 12 14 16 18 20
Single-sided copy: 2.5 ± 1.5 (mm)
Double-sided copy: 2.5 ± 1.5 (mm)
2.5+/-1.5mm
(2nd side of double-sided copy:
2.5+/-1.5mm)
0
2
4
5
6
8
10
Reference
"Left Image
Margin"(page 2-6).
"Leading Edge
Non-Image
Width"(page 2-6).
"Left Non-Image
Width"(page 2-6).
T-2-2 T-2-2