Icom IC-F4021T - Page 37

12 - 2
Explanatory notes
VOLTAGE LINE
TX LINE
RX LINE
COMMON LINE
C707 0.001
C703 0.001
C702 47p
R729
0.15
L901
BLM21P300S
L902
BLM21P300S
L903
BLM21P300S
C708
0.001
C734 470p
D702
RB706F-40
R706 4.7k
C723 47p
C718 47p
R703 1k
C754 0.001
D703
RB706F-40
R726 1k
R727
2.7k
R710 4.7k
R715 22k
R712 22k
C701
0.001
C742
0.001
R704 10
Q704
2SC5006
L705 14nH
C716 0.01
C722 47p
C732 0.001 C735 3p
C731
3p
C715 0.01
C737 0.001 R733 1k
R732 33k
R728 0
L703
0.4-0.9-2TL
L709
14nH
L704
0.4-0.9-2TL
C719 0.01 C757 0.001
C713 47p[H] 30p[L] C712 12p[H] 18p[L]
C733
3p
R730 1k
EP702 ACZ1005Y
EP701
ACZ1005Y
R708 220
C758 1 C760 47p C759 1
C783 0.01
C785 0.01
C786 1
C784
0.001
R742
27k
C787 0.001
R746
1k
C788 0.001
MP701
PA heat sink
C704 47p
C753 0.001
R745
47
C727 47p C736 47p
C726 0.001 C725 47p
C761
0.5p
[L]
C762
0.5p
[L]
Q706
2SC4081
Q703
2SC3356
Q705
XP6401
D701
1SV307
IC701
TA75S01F
1
2
3
4
5
J701
1
2
3
4
R701 100
C729
6p
C756 47p
R743 82k
C755 12p[H] 15p[L]
R731 10k
R741 560
R801 82k
R702 2.7k
R747 10k
C781 47p
C806 1p
C805 3p
[L]
L708 47nH
L707 15nH[H] 18nH[L]
L706 EXCCL3225U
R744
330k
APC
0467003.NR
F701
HV
12
L701 0.82µH
Q702
RD01MUS1
C720
33p[H]
39p[L]
C706 1p
C705 1p[H] 6p[L]
C744 4p
C745
1.5p[H]
2.5p[L]
C711 7p
C709 5p[H] 7p[L]
Q701
RD07MVS1
APC
APC
TX
GND
VCC
T5V
T5V
T5V
P_DET
T5V
T5V
D704 MA2S077
C752
0.001[H]
12p[L]
L712
22nH
D705 MA2S728
J702
1
2
3
4
L802
21nH
C802
1p[H]
0.5p[L]
L801
15nH
C750 4p[H] 6p[L]
L713 33nH
C789 68p
C751 5p[H] 6p[L]
C803 10p[H] 9p[L] C804 2.5p[H] 3p[L]
GND
TI
ISENS
RX
C766 0.001 C769 47p
C767 47p
C771 47p
C724 0.001
PA UNIT
ANT UNIT
TO MAIN
UNIT
TO
MAIN UNIT
TO CONNECT
UNIT J901
VCC
VCC
TX
J1
(CHASSIS)
[L] = Low band
[H] = High band
GND
GND
TX
J901
C901 0.001
C902 47p C905 47p C906 0.001
BATT
BATTERY
CONNECTOR
J2
VCC
VCC
GND
CONNECT UNIT
2
1
1 2
3
4 5 6
[H]
TX: 7.0V
RX: 7.2V
TX: 1.42V[H]
1.60V[L]
RX: 0V
TX: 7.1V
RX: 7.2V
TX: 0.72V
RX: 0V
TX: 6.5V
RX: 6.8V
TX: 0.85V[H]
0.68V[L]
RX: 0V
TX Hi: 2.33V[H]
1.38V[L]
TX Lo: 1.90V[H]
1.07V[L]
RX: 0V
TX: 0.57V
RX: 0V
MEASUREMENT CONDITIONS
DIGITAL VOLTMETER
FREQUENCY: 485.1MHz[High band]
435.15MHz[Low band]
TX: 0.71V[H]
0.65V[L]
RX: 0V
TX: 0.86V
RX: 0V[H]
0.2V[L]
LPF