Icom IC F121S - Manual (Page 67)

ANT
CHASSIS
J1
to DC cable
W2
1
4
8
5
1 8
16 9
1
8
16
9
1
to Optional unit
15
30 16
J1
GND
5V
VCC
NC
AFONO BEEPO
NC DET DISC
NC
CCS CIRQ
SO SI
SCK
PTTI PTT
O
MCO
T
MCIN
NC
BU
S
Y
NC
SIGO OPT1 OPT2 OPT3 GND OPV3 OPV2 OPV1
DIM
40 2
39
to FRONT unit J2
1
J2
D
AST
RMUT MMUT OPT3 OPT2 OPT1 BU
S
Y
SCK
SI SO
CIRQ CCS MIC
EPTT
HORNO
BEEP PW
ON
8V
GND
GND T
ONE
TENC NOIS NWC TMUT UNLK PLST CDEC SDEC O
V12
RSSI LVIN
TEMP BA
TV
RXC
AFON
5V
CPU5
AFO
VCC 1
11
J6
DIM
HORN
GND
AFO
GND
DISC
GND
IN
GND
PTT
to Optional
cable OPC-617
SP
-
1
to
speaker
2
J7
SP+
IC3
EP3 EP2
9-2 MAIN UNIT
• TOP VIEW
9 - 3