CHAPTER 5 TROUBLESHOOTING
5-18
COPYRIGHT © 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
2) Push the push switch SW3 on the DADF
controller PCB without placing any
original on the original tray.
•LED1/2 on the DADF controller PCB
turns on.
•If LED1 does not turn on in 30 sec or
more, suspect the original tray paper
sensor (S1); if LED2 does not turn on in
30 sec or more, suspect the registration
sensor S3 or the DADF controller.
SW1
TP1
J10
J15
J1
CB1
J2
J14
J12
J11
J7
J6
J13
J5
J9
J8
J3
B12
6
1
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
LED1
LED2
Figure 5-146
3) When LED1/2 has turned on, press the
push switch SW3 on the DADF controller
PCB once again.
•The two LEDs will turn off, and the
adjustment will end.
4) Shift the bit on the DIP switch DSW1 on
the DADF controller PCB back to
position.
3. Adjusting the Original Width
Detecting Volume (VR1)
1) Obtain one sheet of A4 or LTR copy
paper.
2) Remove the cover of the DADF, and set
the bits of the DIP switch DSW1 on the
DADF controller PCB as follows:
(Keep in mind that settings differ
according to the size of copy paper.)
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
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
A4
LTR
Figure 5-147