Canon DADF-AA1 Service Manual page 29

3) Checking the front-left height of the DADF
Set paper against the protrusions [1] of the stream reading glass in such a
manner that the seat [2] of the stream reading glass is nearly hidden.
CAUTION:
Set paper so that it does not reach the document reading area [3].
Paper
4) Pulling out the set paper
Pull out the paper in the direction of the arrow to check that you feel slight
resistance.
3. Adjustment Procedure
* When the front or rear side is floating;
1) Adjust the left hinge height.
2) Adjust the right hinge height.
3) Adjust or check the left hinge height.
* When both sides are floating;
1) Adjust the left hinge height.
2) Adjust the right hinge height.
3) Adjust the left hinge height.
4) Adjust or check the right hinge height.
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F-2-23
4. Adjust the height of the left hinge.
1) Adjust the height with the left hinge height adjusting screw [1].
CAUTION:
Loosen the lock nut [2] before adjustment, and tighten it after adjustment.
* If the front spacer is floating, turn the adjusting screw clockwise to bring
the front spacer closer to the glass.
* If only the rear spacer or both front and rear spacers are floating, turn the
adjusting screw counterclockwise to bring the rear spacer closer to the
glass.
[1]
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5. Check the height of the right hinge
1) Close the DADF and check for the following;
- The bottom rib [1] of the DADF must be in contact with the document
glass holder (right) [2]. (There should be no clearance; A=0mm.)
- The document hold sheet [3] must be in contact with the document glass.
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Chapter 2
[2]
2-7