Icom IC-703 Service Manual

SECTION 10 WIRING DIAGRAMS
MAIN
DIAL
SQLS
GND
MICL
MICEL
PTT
AF
U/D
8VLM
J1
J7J8
5V
MDBK
MDAK
GND
DN
AFL AFL
AF
SQL
AF
AFV AFS
UP
AFS
SFT
5V
GND
LRXD
LTXD
8V
AFO
GND
MIC
MICE
PWRK
AFS
NC
PHNK
AFLS
GND
J2
PHONES
J5
J3
W1
(FRONT)
MP19
J1
DN AFL AFL AF SQL AF AFV AFS UP AFS SFT 5V GND
VR BOARD
JACK
BOARD
J1
W9 (CHASSIS)
LRXD
GND
LTXD
MIC
8V
MICE
AFO
PWRK
MP1
LRXD LTXD 8V AFO GND MIC MICE PWRK
EX-2500 DISPLAY BOARD
UT-106
CP21 CP22 CP23 CP24 CP25 CP26 CP27 CP28
MP19
W2
to Microphone
J2451
AFI
AFIE
NC
NC
W109 W110
J2452P2451
AFI
AFIE
J2453
GND
GND
DSPS
5V
MCK
MDT
DSTB
DINT
DRES
GND
J5101
LRXD
GND
LTXD
MIC
8V
MICE
AFO
PWRK
MAIN UNIT
J6701
ESPO
ISPO
ESPE
J7371
J7372
J7121
J6751
J6801
8V
MUDL
AFO
SEND
MICE
MIC
SQLS
6
4
21
3
5
J6851
CIV
NC
CIVE
J6901
DASK
J6921
DOTK
GND
4321
8765
12 11 10 9
13
J6951
DATA
to microphone
REMOTE
KEY
ACC
EXT-SP
SEND
BDT
ISPO
ESPE
GND
to chassis
SP1
to optional
unit
UT-102
8V
EALC
BAND
DIN
PTTP
DAFO
MDT MSST
SPBK MCK
5V GND
GND SPCH
GND
DOUT
SQLS
GND
14V
AAFO
AMOD
SQLS
FSK
KEY
GND
IDH
IDL
TOE
TDTS
PWRS
MDT3
MCK3
DRES
GND
FORL
REFL
TPZL
TPHK
TPZS
TSWL
TGK
GND
HV
NC
8V
T8V
NC
GND
NC
14V
14V
14V
NC
GND
GND
POWS
3V
TPWR
KEY
START
J300
J100
J1
J900 J901
J41
GND
IDH
IDL
TOE
TDTS
PWRS
MDT3
MCK3
DRES
GND
FORL
REFL
TPZL
TPHK
TPZS
TSWL
TGK
GND
EKY
EST
E14V
EGND
HV
NC
8V
T8V
NC
GND
NC
14V
14V
14V
NC
GND
GND
POWS
3V
TPWR
KEY
START
TUNER
PA UNIT
RX
PA I
J1
J2
W3, W4 (CHASSIS)
RX
PA I
PHV
GND
GND
ANT
GND
W80
to
DC
POWER
J641
J640
CP642
J642
ANT
chassis
J1
W5, W6 (CHASSIS)
W7 (CHASSIS)
W8 (CHASSIS)
10 - 1

Icom IC-703 Specifications

General

Brand	Icom
Model	IC-703
Category	Transceiver
Language	English