Icom IC-F3021S Service Manual page 33

CONNECT UNIT
J901
L901
VCC
2 BLM21P300S
VCC
VCC
1
GND
F701
0467003.NR TX: 7.20V TX: 6.92V
VCC 2 1 HV RX: 7.23V RX: 7.23V
VCC
TO CONNECT
UNIT J901 R714
0.15
T5V
Q705
XP6401
TX: 2.25V
RX: 0V
Q706
Q704
J701 C731 2SC4081
5p 2SC5006
TX
4
GND
TO MAIN 3
T5V
UNIT
2
VCC
1
EP712
MMZ1608Y102BT
Q701
RD07MVS1
Q702
C720
C729 RD01MUS1
15p 82p
MP701
PA heat sink
APCV L704
10.5nH
TX H: 3.00V
TX Low: 2.41V
RX: 0V
C784
47p
T5V
R741
10
R745
220k
5 3
APC
APCV 4
1
R746
2
220
IC701
C708
TA75S01F TX: 1.60V
68p
RX: 0V
D701
L703 L708 C701
1SV307
7.5nH 50nH
0.001
C742
L709
54nH 0.001
C745
D703 1.5p D702
RB706F-40 RB706F-40
TX Hi: 3.01V
TX Low: 2.40V
RX: 0V R743
15k
P_DET
T5V
L712
J702 C752 L714
0.001 27nH 47nH
RX
1
GND
TO
2
APC
MAIN UNIT
3
ISENS
4
TX
GND TX Hi: 1.86V
PA UNIT
TX Low: 0.88V
RX: 0V
C801 C802 C807
0.001 5p 10p
TX
GND L802 L801
50nH 32nH
LPF
ANT UNIT
BATTERY
CONNECTOR
J2
Explanatory notes
J1
(CHASSIS)
TX LINE
RX LINE
COMMON LINE
VOLTAGE LINE
12 - 2