Wiring Diagrams; Pa Unit - Icom IC-703 Service Manual

SECTION 10

WIRING DIAGRAMS

VR BOARD
J2
AFS
NC
PHONES PHNK
AFLS
GND
W2
J8 J7
J1
SQLS
GND
MICL
MICEL
to Microphone
PTT
AF
U/D
8VLM
J5
5V
MDBK
MAIN MDAK
DIAL
GND
EX-2500 DISPLAY BOARD
JACK
J1
BOARD W9 (CHASSIS) J5101
LRXD
LRXD
GND GND
LTXD LTXD
MIC MIC
8V 8V
MICE MICE
AFO AFO
PWRK
PWRK
J2451
AFI
AFIE
NC
NC
P2451 J2452
AFI
AFIE
W109 W110
UT-106
J2453
GND
GND
GND
DSPS
5V
MCK
MDT
DSTB
DINT
DRES
J7121
MDT MSST
SPBK MCK
to optional
unit
UT-102
5V GND
GND SPCH
J2
W3, W4 (CHASSIS)
PAI
J1
W5, W6 (CHASSIS)
RX
J6701
W7 (CHASSIS)
HV
NC
8V
T8V
NC
GND
NC
14V
14V
14V
NC
GND
GND
POWS
3V
TPWR
KEY
START
J6751
W8 (CHASSIS)
GND
IDH
IDL
TOE
TDTS
PWRS
MDT3
MCK3
DRES
GND
FORL
REFL
TPZL
TPHK
TPZS
TSWL
TGK
GND
J6801
8V
MUDL
AFO
SEND
to microphone
MICE
MIC
GND
MAIN UNIT
SQLS
J6901
CIV
NC REMOTE
CIVE
J6921
DASK
DOTK KEY
GND
J7372
ISPO
to chassis
SP1
ESPE
J7371
ESPO
ISPO
EXT-SP
ESPE
J6851
DATA
SQLS
6 5
DOUT
4 3
GND
2 1
DIN
PTTP
DAFO
GND
8V
SEND J6951
BDT
4 3 2 1
14V
8 7 6 5
12 11 10 9
AAFO
13
AMOD
SQLS
FSK
KEY
EALC
BAND
J100
PAI
W80
J300
RX PHV
to
GND DC
POWER
J1
HV
NC
8V
chassis
T8V
J1
NC
GND
GND
ANT ANT
NC
GND
14V
14V
14V
J900 J901
NC
GND
EKY
GND

PA UNIT

EST
POWS TUNER
E14V
3V
EGND
TPWR
KEY
START
CP642
J41
GND
IDH
IDL
TOE
J642
TDTS
PWRS
MDT3
MCK3
DRES
J641
GND
FORL
REFL
TPZL
J640
TPHK
TPZS
TSWL
TGK
GND
ACC
10 - 1