Canon F-1, Service Manual

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Adjustments > Adjustment Method > Registration Roller Wheel Skew Adjustment
Adjustments > Adjustment Method > Registration Roller Wheel Skew Adjustment
2. 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
Printed image
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
Guide
6) After adjustment, tighten the screw.
7) Printout a test chart again and check that it is right angle.
F-5-16
F-5-17
Registration Roller Wheel Skew Adjustment
CAUTION:
Execute this adjustment after the right angle adjustment.
MEMO:
On this machine, same registration roller/roller wheel is used to correct the skew on
both sides.
1. Checking the skew
1) Set a test chart on DADF and make a 2-sided print.
2) Compare the rear [A] with front [B] on the leading edge on both front and back sides on the
printed paper to check the leading edge image margin.
If they are not even, make an adjustment.
A
B
Printed image
Feed direction
F-5-18