Figure 9-257.800 Mhz Controller Audio Power Amplifier - Motorola HT Series Detailed Service Manual

800 MHz Circuit Board/Schematic Diagrams and Parts List (PCB 8471827L03)
UNSWB+
C475
10uF
U420
R423
TDA8547
20 11
470K
C447
R472
.022uF 16
36K
IN1POS OUT1POS
17
AUDIO IN1NEG OUT1NEG
15
IN2POS OUT2POS
14
R431
IN2NEG OUT2NEG
C448 470K
R424
0.1uF
36K
6
SELECT
4
MODE
5
SVR
C476
10uF
SWB+
C450 R471
5.6K
NU
Q410
6 4
1 2 3
AUDIO_PA_ENA
6 4
Q411
NU
1 2 3
R499
5V
10K
NU
R473
10
C442
0.1uF
3
18
8
13
2
NC1
7
C443
NC2
9
0.1uF
NC3
12
EXT_MIC
NC4
19
NC5
R435
2K
R434
330
5V
C444
100pF
R436
0
Vdda
C440
2.2uF
EXT_SPKR_SEL
M401
NU
OPT_SEL2
OPT_SEL1
L401
390nH
C445
100pF
SCI_RX
C438
2.2uF
SCI_TX
R421 L400
2K 390nH
RSSI
FLAT_RX_SND
C441
100pF
BOOT_CTRL
INT_MIC
VR432
C497
5.6V
100pF C496
100pF
SWB+
R450
C471
68
100pF C472
100pF C473
100pF
R477
1K
VR433
C493
VR450
5.6V
100pF C490
12.0V
C495
100pF
100pF
C494
100pF
Figure 9-257. 800 MHz Controller Audio Power Amplifier
9-433
VR445 VR446 VR447 VR448 VR449
10.0V 10.0V 10.0V 10.0V 10.0V
J403
20 PIN CONN
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
J403-20
GND
6.8V
VR460
6.8V
C492
100pF
C491
100pF
AUDIO_PA