Figure 9-139.Uhf (450-527 Mhz) Controller Audio Power Amplifier Schematic - Motorola HT Series Detailed Service Manual

9-228
UNSWB+
C475
10uF
U420
R499
R423 TDA8547
10K
82K
C447
R472
16
0.1uF 6.2K
17 IN1POS
AUDIO
R498
IN1NEG
15
IN2POS
10K
R431
14
IN2NEG
C448
R424
470K
0.1uF 36K
6
SELECT
4
MODE
5
SVR
C476
10uF
SWB+
C450 R471
NU 5.6K
Q410
6 4
1 2 3
AUDIO_PA_ENA
Figure 9-139. UHF (450-527 MHz) Controller Audio Power Amplifier Schematic Diagram
R473
10
C442
0.1uF
20 11
3
18
OUT1POS
OUT1NEG
8
OUT2POS
13
OUT2NEG
2
NC1
C443
7
NC2
9 0.1uF
NC3 390nH
12
NC4
EXT_MIC
19
NC5
R435
2K
R434
330
5V
C444
100pF
R436
0
Vdda
C440
4.7uF
EXT_SPKR_SEL
OPT_SEL2
OPT_SEL1
L401
C445
100pF
SCI_RX
SCI_TX
L400
R421
2K 390nH
RSSI
C441 FLAT_RX_SND
100pF
BOOT_CTRL
INT_MIC
VR432
C497
5.6V
100pF
C496
100pF C495
C494
100pF
100pF
UHF Band 2 Circuit Board/Schematic Diagrams and Parts List (PCB 8486686Z02)
SWB+
VR445
10.0V
R450
68
C471
C472
100pF
C473
100pF
100pF
R477
1K
VR450 VR433
C493
10.0V 5.6V
100pF
C490
100pF
C492
100pF
C491
100pF
M401
VR446 VR447
10.0V 10.0V VR449
VR448 10.0V
10.0V
J403
20 PIN CONNECTOR
J403-1 GND
J403-2 INT_SPK+
J403-3 INT_SPK-
EXT_SPK+
J403-4
EXT_SPK-
J403-5
OPT_B+
J403-6
EXT_MIC
J403-7
J403-8 OPT_SEL_2
J403-9
OPT_SEL_1
J403-10 GND
Rx_DATA
J403-11
J403-12 Tx_DATA
J403-13
GND
J403-14 RSSI
Rx_AUDIO/Tx_AUDIO
J403-15
J403-16 BOOT_CTRL
J403-17
NC
J403-18 MIC
GND
J403-19
VR434
GND
6.8V J403-20
VR460
6.8V