Icom IC-7400 Service Manual page 67

9-9 MAIN UNIT
• TOP VIEW
2 1
J741
to CTRL
unit J13
J1001
22 GND DTIF 21
GND GND
DRAF GND
GND GND
MONI DAGC
GND GND
8V 8V
GND GND
GND DTAF
GND GND
DRIF GND 1
2
to DSP unit J901
J400
11
1 3LO
2 GND
20
to RF unit J1601
14
1
1 8
4 5
1 8
4 5
10
1
8
7
21 1
J100
22 2
to RF unit J2
9 - 7
8 1
9 16
65 64
39
38
102
103
1
128
14 8
1 7
4
J761
to CHASSIS J1
P261
2IF
from RF unit J261
6 5
10 1
21 1 2
1
J802
J160
to CHASSIS MF1
22 2
to RF unit J1001
J140
1 CIKY
CIST 2
GND
CANT
GND
CDRS
GND
CREF
CFOR
GND
to CTRL
GND
C-8V
unit J7
GND
C5V
C5V
NC
GND
CT8V
GND
C14V
21 C14V
C14V 22
J1000
1 GND NC 2
GND GND
DRQW DWBY
DCK DDTW
GND GND
DRQR DDTR
DRBY DSTR
to DSP
GND GND
unit J902
CTFL NSQL
TOFF RTDT
VSQL DCBY
NC NC
GND GND
DSKY DSST
29 DRES GND 30
J1920
2 SSTB MDAT_UT 1
MCK_UT SBSY to optional
SPCE 5VL unit UT-102
8 SPCH GND 7
J180
1 FSPS
2
PAFO
PAFE
FLFM
FLMF
GND
FDRS
FPWK
SQL
SEND
MICE
to S-LOGIC
MIC
GND
board J601
-8V
GND
GND
5VL
5VL
GND
8V
21 GND
14V
22
J120
1 PPWS
PDRS 2
PFSB
PMDT
PMCK
P5V
P5V
PH5V
THML
P8V
P8V
GND
PT8V
GND
to PA
PVRF
FVFR unit J5
GND
PGND
PICL
PICH
P14A
P14A
P14V
P14V
P14V
P14V
P14V
1 P14V
29 P14V
PHV 30