Canon AJ1 Service Manual page 50

5. Adjustment
3. Loosen the Fixation Screw.
1x
4. Move the Adjustment Plate to the left or right according to the scale value checked in step 3. As the Adjustment
Plate is moved toward the left of the machine by 1 scale mark, the left edge margin is increased by 0.5 mm.
5. Tighten the Fixation Screw.
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