Angle Guide (Angle Of Opening Of 70 Deg); Magnification; Horizontal Registration - Canon DADF-M1 Service Manual

A
B
7) Remove the screw [1], and fit it and temporarily tighten it in the screw
hole [2].
- if A>B, move up the plate [1] to make adjustments.
- if A<B, move down the place [1] to make adjustments.
8) When done, move back the screw [1] to its initial hole, and tighten it fully.
9) Make a copy of the Text Chart, and make sure that the angle is a right an-
gle by comparing the output and the Test Chart.

4.3.1.8 Angle Guide (angle of opening of 70 deg)

Adjust the angle of opening as follows:
1) Bend over the edge of the rubber cover [1], and mount the angle guide
plate [3] in place using 2 screws [2].

4.3.1.9 Magnification

F-4-38
[1]
[2]
F-4-39
[1]
[3]
[2]
[1]
F-4-40
Memo:
To adjust the magnification, compare an image made in stream reading mode
and an image made in copyboard mode. Unlike other ADFs, you will not be
comparing a copy image and its original.
1) Using A4 or LTR paper, prepare a test chart as follows:
2) Place the test chart you have prepared on the copyboard glass, and make
a copy. Refer to the output as copy A.
3) Place the test chart in the original pickup tray, and make a copy at a 100%
reproduction ratio. Refer to the output as copy B.
4) Put copy A and copy B together, and compare the length of the image in
feed direction, making sure that dimension a is as indicated. If not, go to
step 5).
standard: a </= 1 mm
0003-2278
5) Start service mode as follows: press the User Mode key, press the 2 and 8
keys at the same time, and press the User Mode key once again.
6) Make the following selections: FEEDER>ADJUST>LA-SPEED; then,
change the setting to make adjustments.
-To make the image on copy B longer, decrease the setting (so that the
stream reading speed will be decreased).
To make the image on copy B shorter, increase the setting (so that the
stream reading speed will be increased).
[ range -30 to 30 : -3 to + 3 % ]
7) Make a copy of the text charge once again, and check to see that the image
is as indicated.

4.3.1.10 Horizontal Registration

MEMO:
If the image is still not indicated after making adjustments using the host ma-
chine's service mode, adjust the side guide plate of the ADF original pickup
tray.
a. Making Adjustments Using the Host Machine's Service Mode
1) Obtain the Test Chart.
If the Test Chart is not available, prepare one using A4 or LTR paper as
follows:
0003-2302
10mm 10mm
Right angle
F-4-41
<If Cop A Is Shorter>
Copy A
Feed
direction
a
Copy B
<If Copy A Is Longer>
Copy A
Feed
direction
a
Copy B
F-4-42
Chapter 4
0003-2279
4-15