Icom IC-703 Service Manual page 74

MAIN UNIT(6)
BUS LINE1
14V
5V
5V
T8L
8V
3V
BUS LINE6
MAIN
UNIT
(5)
MIC
MICE
MUDL D6801 MA2S111
AFO
SEND
MICE
MIC MIC
AFO
CIV
CIVE
DASK
DOTK
8V
MDT
MSST
SPBK
MCK
5V
SPCH
ESPO
HV
HV
ESPE
BUS LINE3
11 - 7
IC9801
TC74HCT7007AF
PDT 1 14
PDT5 2 13 PDST
PCK 3 12 DST5
PCK5 4 11 P2ST
PMST 5 10 SST5
PST5 6 9 PBST
7 8 BST5
Q9801
XP4311
5V 4 3
D9801 DAP222
ULP
5 2
ULS
UNLK 6 1
LOCK: 3.2V
UNLOCK: 0V
HV
SQLS
SEND
8V
J6801
EP6801 EP6821 8V
EP6802 EP6822 MUDL
EP6803 EP6823 AFO
L6804 BM27-400-6A SEND
EP6805 EP6825 MICE
EP6806 EP6826 MIC
GND
EP6807 EP6827 SQLS
J6901
EP6901 CIV
EP6902 CIVE
J6921
EP6911 EP6921 DASK
EP6912 EP6922 DOTK
EP6923
EP6924
J7121
MDT
MSST
SPBK
MCK
5V
GND
GND
SPCH
J7372
ISPO
ESPE
J7371
ESPO
ISPO
ESPE
L7373
BM27-400-6A
START
KEY
TPWR
POWS
IDH
IDL
TOE
TDTS
PWRS
MDT3
MCK3
DRES
FORL
REFL
TPOL
TPHK
TZK
TSWL
TGK
R6852
1k
to microphone SQSS
Q6851
2SK3018
SQLS
DOUT
REMOTE
DIN
KEY
PTTP
AAF
START
to optional
unit
UT-102
14V
AMOD
SQLS
FSK
to chassis
KEY
SP1
EALC
BAND
EXT-SP
14V
T8V
8V
3V J6701
R6704 1k START
R6703 1k KEY
R6702 1k TPWR
3V
R6701 1k POWS
GND
GND
NC
14V
to PA
14V
unit J1
14V
NC
GND
NC
T8V
8V
NC
HV
J6751
GND
R6751 1k IDH
R6752 1k IDL
R6753 1k TOE
R6754 1k TDTS
R6755 1k PWRS
EP6756 MDT3
EP6757 MCK3
R6758 1k DRES to PA
unit J41
GND
R6759 1k FORL
R6760 1k REFL
R6761 1k TPZL
R6762 1k TPHK
R6763 1k TPZS
R6764 1k TSWL
R6765 1k TGK
GND
SQL CLOSE: 7.9V
OPEN:0V
EP6851 EP6871
SQLS
EP6852 EP6872
DOUT
EP6876
GND
EP6853 EP6873
DIN
EP6854 EP6874
PTTP
EP6855 EP6875
DAFO
L6963
LR-270
GND
L6951 BM27-400-6A
8V
L6953 BM27-400-6A
SEND
BDT
EP6952
L6954 LR-270
14V
AAFO
EP6955
EP6956 AMOD
EP6957 SQLS
EP6958 FSK
EP6960 KEY
EALC
EP6959
BAND
EP6961
J6851
DATA
6 5
4 3
2 1
J6951
4 3 2 1 ACC
8 7 6 5
12 11 10 9
13