Canon DADF-J1, Service Manual

Page: 97 / 271

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-J1 REV.0 MAR.2001
CHAPTER 2 OPERATIONS AND TIMING
2-74
3 Jams
The DADF uses the sensors shown in F02-301-03 to detect a jam. The timing at which
jam detection is tuned on is programmed in advance in the CPU on the ADF controller PCB,
and the presence/absence of a jam is detected in relation to the presence/absence of paper
over a specific sensor.
When a jam is detected, the DADF communicates the fact to the copier in the form of a
code, and some copiers allow a check on jam codes in service mode. The indicator (LED2)
on the ADF controller PCB of the DADF may also be used to check codes.
Copier’s Service Mode Screen
F02-301-01 Screen
Indication on the DADF
The indication (LED2) on the ADF controller PCB is based on how the LED flashes (four
times); for example, if the code is J-13,
F02-301-02
F02-301-03
< JAM >
01 0202 1707 1708 010B
010B
020A
0
0
0
7
7
7
2
2
2
7
0
0
11 A4
A4
A4
A4
9
7
3
0
0
0202 1704 1706
0202 1703 1703
0202 1611 1623 1400
0202 1611 1611 1400
0202 1533 1534 1400
- - - -
- - - -
- - - -
- - - -
- - - - -
- - - -
- - - -
- - - -
- - - - - -
- - - - - -
- - - - -
- - - - -
- - - - -
- - - - -
-
-
-
02
03
04
05
06
07
08
< 1/7 > < READY >
Display I/O Adjust Function Option Test Counter
Jam code
See tables T02-301-01 and later.
'1'indicates a jam in the machine.
PI 4
PI 7
PI6
PI3
PI12
S6
(light-emitting)
PI 8,
PI 9
S1
S2
S3
S8
S7
S9
PI 10
PI 13
S6
(light-receiving)
S4,S5