Icom IC-2720H Service Manual page 49

MAIN UNIT (5)
BUS LINE2
BUS LINE2
5VS 5VS
L140_R5 L140_R5
VV VV
C129
0.5p
C2138
33p
C112
9p RX: 3.72V
D28
MA2S077
o
L_BPF4 L_BPF4
L_BPF3 L_BPF3
C158
100p
L_BPF2 L_BPF2
L_BPF1
MAIN
UNIT R140_R5
UV
(4)
C130
0.5p
C2170
33p
C113
9p TX: 0V
RX: 0V
5VS
BUS LINE4
D29
MA2S077
p
R_BPF4 R_BPF4
R_BPF3 R_BPF3
R_BPF2 R_BPF2
R_BPF1
L220_R5
V220
C114
2p
C298 R196 R99
0.001 15 100k
D30
MA2S077
L300_R5
VU1
C115
3p
C299 R199
R100
0.001 15 100k
D31
MA2S077
L_BPF1
BUS LINE3
5VS
RL1
ATQ209
C2137
RX: 2.73V
0.001 +
C153 L1048
9p 18n
-
Q29
3SK272
Q34
2SC4116
V-V(118-180MHz)
C165 C202 R149 R2192
0.5p 0.001 1 120
C2136
33p
VATT
R142
1k
L_BPF1
R140_R5
UV
D52 MA2S111
TX: 0V
C2169
RX: 0V
0.001
D2049 MA2S111
C154 L1049
9p 18n
Q30
3SK272
VHF TX: 0V
UHF TX: 3.64V
RX: 3.58V
U-V (136-174MHz)
C203 0.001
C166 0.75p
Q33
R150
3SK272
120
C2168
33p
UATT
R148
1k
R_BPF1
R141 D62
2.2k MA2S077
V220 (174-260MHz)
C169
3p
Q31
2SC5624
R132
100k
D63
MA2S077
R147
2.2k
V-U(225-375MHz)
C157
3p
Q32
2SC5624 R129
100k
J1
q
r
TX: 0.08V
RX: 0.15V
CHASSIS UNIT
CHASSIS
J1
+
M
MF1
-
10 - 6