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IC-7700
Service manual
Icom IC-7700 Service Manual page 84
Hf/50mhz transceiver
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:
Instruction manual
(232 pages)
,
Service manual
(135 pages)
,
Installation and connections
(11 pages)
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SECTION 8
WIRING DIAGRAM
• FRONT UNIT
J203
GND
1
GND
2
LRXD
3
LTXD
4
NC
5
LG_PWR
6
NC
7
DISPLAY
LG_RES
8
+3R3V
9
GND
10
GND
BOARD
11
C15V
12
C15V
13
C15V
14
NC
15
+8V
16
MSND
17
GND
18
NC
19
VDD5VF
20
J605
SPE
2
I NTSP
1
J606
NC
3
SPE
2
I NTSP
1
OPC-875A
OPC-1838
W2
8900015940
W1
8900017300
SW-A
BOARD
VR-A
BOARD
J1
PHE
PHE
10
1
PHO
9
2
PHO
PHE
8
3
PHE
NC
NC
7
4
NC
NC
6
5
W3
PHNI
5
6
PHNI
GND
4
7
GND
DASH
DASH
3
8
DO T
DOT
2
9
GND
GND
1
10
MICI
J103
M ICE
OPC-886A
PHO
8900015930
PHE
AFO
AF E
J2
MICI
MICI
10
1
M8 V
M8 V
9
2
8
3
MUD
MUD
SQLS
SQLS
7
4
MSND
MSND
6
5
W4
GND
GND
5
6
GND
4
7
GND
3
8
M ICE
M ICE
GND
GND
2
9
AFO
AFO
1
10
J104
OPC-1836
8900017280
CN2
J301
CFLH
H
1
1
GND
L
2
2
LCD
OPC-1332A-1
W1 3
8900014871
To LOGIC UNIT
OPC-1837
OPC-1825
OPC-909A
W7
W6
W5
8900017290
8900017100
8900014720
SW-B
USB
VR-B
BOARD
BOARD
BOARD
12
11
To LOGIC
8 - 1
OPC-909A
8900014720
J1
J4
LDPS
10
LDPS
1
NC
NC
P1A
LED
2
9
1
10
P1A
TXD
TXD
P1B
3
8
2
9
P1B
RXD
4
7
RXD
P2A
3
8
P2A
LCKD
5
6
LCKD
P2B
4
7
W10
P2B
BOARD
SPLD
SPLD
GND
6
5
5
6
GND
W1 1
NC
NC
GND
7
4
6
5
GND
NC
NC
NC
8
3
7
4
NC
NC
9
2
NC
NC L
8
3
NC L
GND
GND
DGSL
10
1
9
2
DGSL
+3R3V
10
1
+3R3
J5
J1
OPC-886A
8900015930
J1
LST1
40
1
LST1
39
2
LDPS
LDPS
NC
38
3
NC
J8
+5V
37
4
+5V
GND
GND
NC
36
5
NC
1
10
DGSL
35
6
DGSL
NC
2
9
NC
34
7
+3R3V
3
8
+3R3V
NCL
NC L
GND
GND
P2B
33
8
P2B
4
7
PITL
PITL
P2A
32
9
P2A
5
6
W1 2
P1B
31
10
P1B
NC
6
5
NC
30
11
NC
7
4
NC
P1A
P1A
NC
NC
PITL
29
12
PITL
8
3
NC
NC
TSK
28
13
TSK
9
2
GND
GND
KI0
27
14
KI0
10
1
KI1
26
15
KI1
J1
16
OPC-886A
KI2
25
KI2
KI3
24
17
KI3
8900015930
GND
23
18
GND
GND
22
W9
19
GND
21
20
NC
NC
V
+3R3V
20
21
+3R3
NC
19
22
NC
KI5
18
23
KI5
KI4
17
24
KI4
25
GND
16
GND
GND
15
26
GND
RSA
14
27
RSA
RSB
13
28
RSB
12
29
UPK
UPK
DWK
11
30
DW K
VMK
10
31
VMK
MPW K
9
32
MPWK
MWK
8
33
MWK
MPRK
7
34
MPRK
XFCK
6
35
XFCK
ABK
5
36
ABK
EQRK
4
37
EQRK
3
38
LDAT
LDAT
LCK
2
39
LCK
LOE
1
40
LOE
J1
J7
1
1
+5V
RIT-SENSOR
RSB
2
2
RSA
3
3
EX-2500 #03
GND
4
4
J205
+5V
1
1
MAIN-SENSOR
MSB
2
2
MSA
3
3
RMS20-250-201- P
GND
4
4
OPC-886A
W8
8900015930
FRONT UNIT
VR-C
(page 10-1)
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