Canon imageRUNNER ADVANCE 4551i Service Manual page 324

■ Basic Adjustment
● Overview of Adjustment
The DADF has the following adjustment items. The following is the order of adjustment.
No.
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
● 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".
10 mm
10 mm
10 mm
Adjustment Items
311
10 mm
5. Adjustment