![background image](http://html.mh-extra.com/html/icom/ic-7400/ic-7400_service-manual_612265064.webp)
9 - 4
22
21
2
to MODE
board J1
1
J505
MNUK
F2K
F4K
SSBK
AFMK
GND
GND
GND
GND
GND
GND
F1K
F3K
F5K
CWRK
FILK
GND
GND
GND
GND
GND
GND
22
21
2
to S-LOGIC
board J301
1
J1001
GND
-
8V
LOCK
SRES
MDNK
PB1A
MSB
LMFD
MSA
BKL
5VL
8V
SPEK
-
8V
MUPK
PB1B
GND
LFMD
RSB
RSA
GND
5VL
LDV
22
21
1
1
to TEN-KEY
board J1
J503
KI2
KI4
KI6
XFCK
MPRK
RXD
SPLD
GND
GND
GND
5VL
KI3
KI5
KI7
MPWK
TXD
LOCK
FIND
GND
GND
GND
1
2
21
22
to S-LOGIC
board J302
J1002
GND
GND
PB2A
TRAK
ANTK
APFK
DSHK
KYSL
PWRL
APFL
RFL
GND
PB2B
KIOI
TUNK
NRK
DOTK
MUD
RITL
MIGL
NRL
AFL
1
8
16
9
1
4
8
5
1
4
8
5
1
4
8
5
1
4
8
5
1
25
26
50
100
76
75
51
1
30
31
50 51
80
81
100
1
100
81
31
50
30
80
51
1
4
8
5
1
4
8
5
1
4
8
5
1
30
31
50
100
81
80
51
1
25
26
50
100
76
75
51
• BOTTOM VIEW (DISPLAY BOARD)
Summary of Contents for IC-7400
Page 1: ...HF VHF TRANSCEIVER i7400 SERVICE MANUAL ...
Page 63: ...to S LOGIC board J303 DS1002 9 2 DISPLAY BOARD TOP VIEW 9 3 for free by RadioAmateur eu ...
Page 72: ...9 12 1 9 18 10 BOTTOM VIEW RF UNIT for free by RadioAmateur eu ...
Page 74: ... BOTTOM VIEW CTRL UNIT 9 14 for free by RadioAmateur eu ...
Page 76: ... BOTTOM VIEW TUNER UNIT 9 16 for free by RadioAmateur eu ...
Page 78: ...9 18 BOTTOM VIEW PA UNIT for free by RadioAmateur eu ...
Page 92: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13811HZ C2 2002 Icom Inc ...