Motorola HT Series Service Manual page 121

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R423
TDA8547
47K
C447
R472
0.1uF 16
3.6K
17
AUDIO
15
R431
14
C448
470K
R424
0.1uF
36K
6
4
5
C476
10uF
C450
0.1uF
6
1
AUDIO_PA_ENA
*
NOTE: FOR VHF RADIOS, C444 HAS A VALUE OF 4.7uF.
UNSWB+
C475
10uF
R473
10
C442
U420
0.1uF
20 11
VCC1 VCC2
3
IN1POS OUT1POS
18
IN1NEG OUT1NEG
8
IN2POS OUT2POS
13
IN2NEG OUT2NEG
2
NC1
7
SELECT NC2
9
MODE NC3
12
SVR NC4
EXT_MIC
19
NC5
R434
SWB+ 330 Ohm
5V
R471
5.6K
R436
0
Vdda
4 Q410
2 3
EXT_SPKR_SEL
# (
OPT_SEL2
C443
L401
0.1uF
390nH
C445
100pF
R435
2K
* SCI_RX
C444
100pF
SCI_TX
R421 L400
2K 390nH
RSSI
FLAT_RX_SND
C441
C440
4.7uF 100pF
BOOT_CTRL
INT_MIC
C497
C496
100pF
VR432
100pF
5.6V
SWB+
R450
OPT_SEL1
68
C471 C472
100pF
100pF
C473
100pF
R477
1K
C493
C490
100pF
C495
VR450
100pF
100pF 10.0V VR433
5.6V
C494
100pF
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VR446 VR447
VR448
VR449
VR445
10.0V 10.0V
10.0V 10.0V
10.0V
J403
20 PIN CONNECTOR
J403-1 GND
J403-2 INT_SPK+
J403-3 INT_SPK-
J403-4 EXT_SPK+
J403-5
EXT_SPK-
J403-6 OPT_B+
J403-7
EXT_MIC
J403-8 OPT_SEL_2
J403-9
OPT_SEL_1
J403-10
GND
J403-11
RX_DATA
J403-12 TX_DATA
J403-13 GND
J403-14 RSSI
J403-15
RX_AUDIO/TX_AUDIO
J403-16 BOOT_CTRL
J403-17 NC
J403-18 MIC
J403-19 GND
VR434
6.8V
J403-20 GND
C492
100pF
C491
100pF
FL0830721O