Adjustment; Overview Of Adjustment; Preparation Or Creation Of Test Chart; Adjusting The Height - Canon DADF-AV1 Service Manual

Adjustment

Overview of Adjustment

The DADF has the following adjustment items. The following
is the order of adjustment.
No. Adjustment Items
1

Adjusting the Height

2 Adjusting the Perpendicularity
3 Adjusting the Read Position
4 Adjusting the Magnification
5 Adjusting the Image Position (Main Scanning Direction)
6 Adjusting the Image Position (Sub Scanning Direction)
7 Adjusting the White Level
Preparation or Creation of Test
Chart
Prepare a test chart. If there is no test chart, create a test
chart.
Create a test chart that has a 10 mm smaller rectangle from
the edge of A4 or LTR paper.
NOTE:
Be sure to write a character or mark to identify the printed
image direction.
10 mm
10 mm
10 mm
10 mm
97
Adjusting the Height
■ Check the Left Hinge Height
● When Visual Check
1. Close the DADF and check whether the front and
rear ADF scan glass spacers are in close contact
with the ADF scan glass.
NOTE:
If visual check is difficult, perform the check with reference
to "When Check with the Paper".
6. Installation