Canon PC720 Service Manual - Page 176
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DC controller Circuit Diagram (4/8) P1 8 34 2 0 29 RA N U U cc P3
DC
controller
Circuit
Diagram
(4/8)
8
(DIG1)
34
_J
KRO
KR1.
KRZ
KR3
KR4
2
0
29
•
KR6
KR7
RA
P1<7.
.0>
8
P3<7.
U
cc
P4<3>
P4<4>
U
cul
8137
N
---
n7
mi
IR
Q
+5V
A
p4<5>
P4<6>
0113
S
GO*
0114
S
G
0115
S
G2
0116
SE638
G117
S
648
0118
S
G5
0119
SEG6*
0120
S
67*
R136
R135
3
2
0121
2
G124
DIGO
2
0123
•---r„
..
;
0122
cc
G1
2
I
KR6
IG3
r
D113
EAT1
12
HEAT2
0188
(YOGI
1)
01
117
D186
HTMK
T
YO
ZS
(DIG2)
CPU
•
NH
JAM
<0
D110
01
109
2
PPS300
DIG2
2
SFPO
NH
ABNOR
03I631
108
1
Vie
OPO
CHECK
M
HEAT
RUN
r
0115
i
2
DZGO
(CPM0)
01
114
1
V12
0061
KR2
01
303
2
DIG3
I
IAB/INCH)
I
I
KR5
0190
2
DIGO
I
I
[230v/100v)
i
I...
J
A
-
8
COPYRIGHT
©
1994
CANON
INC.
CANON
PC72011401750R70
REV.O
AUG.1994
PRINTED
IN
JAPAN
phIPRIME
AU
JAPON)