Logic Unit - Icom IC-FR4000 Service Manual

LOGIC UNIT

¡ ¡ BOTTOM VIEW
22
21
GND
GND
M9V
M9V
GND
SCK
SDTO
RPLSTB
GND
R9C
to RX UNIT J2
J1
RUNLK
W/NS
RSSI
RLV
RVCON
TUNE
GND
DISC
SQL
GND
NDET
GND
2
1
22
21
GND
M9V
M9V
SCK
SDTO
DA1STB
TPLSTB
TUNLK
TLV
J2
GND
to TX UNIT J3
TMUTE1
W/NS
GND
TXAF
I TONE
E TONE
GND
TMUTE2
PATEMP
RVSWR
FWSWR
GND
2
1
to OPTIONAL UNIT
to OPTIONAL UNIT
J7
J8
The combination of this page
and the previous page shows
the unit layout in the same con-
figuration as the actual P.C.
Board.
10
9
REMOTE
SPMUTE
MICE
J4
MIC
GND
to FRONT UNIT J1
L9V
CLONE
M PTT
M MONI
GND
2
1
24
23
DCL
PROGL
TXL
RMTL
BASEL
BUSYL
D5V
D5V
DB7
DB6
DB5
J3 DB4
ENA
to FRONT UNIT J2
R/W
RS
A5V
GND
GND
PROG
DISP
CHDN
CHUP
I R/B
I MONI
2
1
4 1
J5
to REG UNIT J13
9 1
J6
to REG UNIT J14
10 2
9 - 4