Canon imageRUNNER ADVANCE C5051 Series Service Manual page 442

4
Parts Replacement and Cleaning > Option > Removing the Reader Unit > Preparations
b. Adjustment for back side reading
1) Set a test chart to DADF upside down and make a 2-sided print.
2) Check the right angle accuracy of angle A on the printed paper. If it is not right angle, make
an adjustment.
Image on test chart
Feed direction
3) Remove the front cover.
4) Loosen the adjustment screw.
5) Adjust the position of the guide that supports the scanner unit.
If A is less than 90 deg, move the guide to right direction (black arrow direction).
If A is more than 90 deg, move the guide to left direction (white arrow direction).
Adjusting screw
6) After adjustment, tighten the screw.
7) Printout a test chart again and check that it is right angle.
4 Parts Replacement and Cleaning > Option > Removing the Reader Unit > Preparations
Printed image
F-4-382
Guide
F-4-383
Removing the Reader Unit
■ Preparations
NOTE:
When removing the ADF Unit and the Reader Unit from the host machine, make sure
to remove the ADF Unit first and then, remove the Reader Unit since the accuracy of
scanner systems may be deteriorated.
● Remove the Left Rear Cover and the Left Rear Sub Cover.
1) Remove the Left Rear Cover.
• 2 rubber caps
• 2 screws
• 5 claws
Rubber cap
x2
x5
Rubber cap
2) If the Reader Unit is installed, remove the reader signal cable.
• 1 connector
4-176
Claws
F-4-384
F-4-385
4-176