COPYRIGHT © 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
5-1
CHAPTER 5 TROUBLESHOOTING
I.
STANDARDS AND
ADJUSTMENTS
A.
Mechanical System
1
Adjusting the DADF Height
1) Remove the copier's rear cover.
Turn the bolt of the left/right support so
that the distance a between the two rubber
feet at the rear and the horizontal size plate
on the copyboard glass is 0.2±0.1 mm
(about two sheets of copy paper of 64 g/
m
2
) when the DADF is closed, i.e., the feet
at the front are in contact with the
copyboard glass.
After adjustment, tighten the nuts to lock
them.
DADF
Rubber foot
(front)
Support
Copier's
rear cover
Rubber foot
(rear)
Horizontal
size plate
Nut
Bolt
Copyboard glass
Copier
a
a=0.2+0.1mm
Figure 5-101
2) After adjustment, check to make sure that
both left and right rubber feet at the front of
the DADF are in contact with the
copyboard glass. Otherwise, adjust the left
and right supports once again.
2
Adjusting the Original Stop
Position
Adjust the original stop position after
"adjusting the DADF height"; then, perform
"correcting the skew," "adjusting the distance
to the horizontal size plate," and "adjusting the
original leading edge stop position."
a. Correcting the Skew
1) Remove the screw, and detach the DADF
controller cover.
DADF controller cover
Screw
Figure 5-102
2) Shift bit 1 of the DIP switch (DSW1) on
the DADF controller PCB to ON.
ON
12345678
LED1
LED2
SW1
TP1
J10
J15
J1
CB1
J2
J14
J12
J11
J7
J6
J13
J5
J9
J8
J3
6
1
B12
B1
2
1
1
3
1
2
1
3
1
2
13
1
14
2
A1
A12
1
1
1
1
9
10
1
4
2
2
8
1
7
1
DSW1
SW2
SW3
Figure 5-103
3) Place an A3 or 279.4×431.8-mm
(11"×17") sheet of copy paper (64 g/m
2
)
on the original tray.
