Canon DADF-AA1, Service Manual

Page: 92 / 110

Chapter 5
5-6
1) Load a test chart in the DADF to make a copy.
2) Check the perpendicularity at the leading edges of the test chart and copy.
Measure dimensions A and B on the test chart and dimensions A' and B'
on the copy. If it is not (A-B) = (A'-B'), go through steps 3) and later.
F-5-12
3) Loosen the screw [1] securing the right hinge.
F-5-13
- A' > B'
Slide the hinge [1] of the DADF forward.
F-5-14
- B' > A'
Slide the hinge of the DADF backward.
4) Tighten back the fixing screw you loosened in step 3).
5.3.1.4 Adjusting the Read Position
0024-7053
1) Start service mode.
[Starting Service Mode]
Press the User Mode key, press the 2 and 8 keys at the same time, and
press the User Mode key once again.
2) On the Service Mode screen, touch the following notations in sequence to
bring up the Adjustment screen:
1 COPIER
2 FUNCTION
3 INSTALL
3) Press [STRD-POS] to highlight.
4) Touch [OK].
A press on [OK] will cause the scanner to start a scan; in several sec-
onds, the machine will end auto adjustment of the read position and indi-
cate 'OK'.
5.3.1.5 Adjusting the Horizontal Registration
0024-7054
1) Place the test chart in the DADF, and make a copy.
2) Compare the copy against the Test Chart for the horizontal registration; as
necessary, make the following adjustments:
3) On the Service Mode screen, touch the following notations to bring up the
Adjustment screen:
1 COPIER
2 ADJUST
3 ADJ-XY
4 ADJ-Y-DF
- if the image is displaced to the front, decrease the setting.
- if the image is displaced to the rear, increase the setting.
unit of adjustment: 0.1 mm
5.3.1.6 Adjusting the Trailing Edge Registration
0024-7055
1) Place the Test Chart in the DADF, and make a copy.
2) Compare the copy against the Test Chart for the trailing edge registration;
as necessary, make the following adjustments:
3) On the Service Mode screen, touch the following notations to bring up the
Adjustment screen:
1 FEEDER
2 ADJUST
3 DOCST
- if the image is displaced to the leading edge, decrease the setting.
- if the image is displaced to the trailing edge, increase the setting.
unit of adjustment: 0.1 mm
5.3.1.7 Adjusting the Magnification
0024-7056
1) Place the Test Chart in the DADF, and make a copy. Refer to the output
as copy A.
2) Compare Test Chart and copy A in terms of the length of the image in feed
direction; as necessary, make adjustments in service mode.
3) From the Service Mode screen, touch the following notations to bring up
the Adjustment screen:
1 FEEDER
2 ADJUST
3 LA-SPEED to highlight
- if the image of copy A is shorter, decrease the setting (so that the speed at
which originals are moved in stream reading mode will be reduced).
- if the image of copy A is longer, increase the setting so that the speed at
which originals are moved in stream reading mode will be increased).
unit of adjustments: 0.1%
MEMO
The test chart is printed on the back cover of the Installation Procedure (this
manual). Copy it or clip it out.
B
A
B’
A’
A A
B
B
Chart feed
direction
Test chart copy
[1]
[1]
CAUTION:
If the machine fails auto adjustment and indicates 'NG', go through the
following:
(1) Clean the white roller of the DADF and the stream reading glass of the
host machine; then, execute auto adjustment once again.
(2)If the auto adjustment operation still fails, start service mode, and make
adjustments manually:
COPIER>ADJUST>ADJ-XY>STRD-POS
CAUTION:
After completion of this adjustment, check the perpendicularity. If the
perpendicularity is not within spec, adjust it again following the procedures
mentioned in "Adjusting the Perpendicularity" and later.