Canon imageRUNNER ADVANCE C5051 Series Service Manual page 441

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Parts Replacement and Cleaning > Option > Removing the ADF Unit > Right Angle Adjustment
■ Right Angle Adjustment
NOTE:
There are 2 adjustment methods; for front side reading (reader side scanner unit) and
for back side reading (DADF side scanner unit).
a. Adjustment for front side reading
1) Set a test chart to DADF and make a 1-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
4 Parts Replacement and Cleaning > Option > Removing the ADF Unit > Right Angle Adjustment
Printed image
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3) Loosen the 2 knurled screws on front of right hinge unit.
4) Open the rubber cover on the back of right hinge unit and loosen the screw, and then make
an adjustment by the hexagon socket bolt.
If A is less than 90 deg, rotate it clockwise.
If A is more than 90 deg, rotate it counterclockwise.
Knurled screw
5) After adjustment, tighten the fixing nut and 2 knurled screws.
6) Printout a test chart again and check that angle A is right angle.
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Rubber cover
Hexagon socket bolt Fixing nut
F-4-381
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