Motorola HT Series User Manual

9-398 Low Band Circuit Board/Schematic Diagrams and Parts List
GND
RX_DATA
TX_DATA
GND
RSSI
RX_AUDIO/TX_AUDIO
20 PIN CONN
J403
INT_SPK+
NC
BOOT_CTRL
GND
MIC
GND
GND
INT_SPK-
EXT_SPK+
EXT_SPK-
OPT_B+
EXT_MIC
OPT_SEL_2
OPT_SEL_1
C497
100pF
470K
R431
C490
100pF
J403-3
C448
0.1uF
J403-16
J403-4
J403-1
J403-10
R471
12.0V
VR450
5.6K
R421
J403-18
2K
C442
0.1uF
J403-7
68
R450
0.1uF
C450
100pF
C444
R436
1K
R473
10
100pF
C471
J403-13
J403-14
3
Q410
2
6
4
1
100pF
0.1uF
C491
100pF
C443
C445
100pF
C441
J403-8
R435
2K
C492
100pF
10.0V
VR449
C447
.022uF
R424
36K
6.2K
R472
82K
R423
C440
2.2uF
C438
2.2uF
11
VCC2
VR446
10.0V
NC5
19
18
OUT1NEG
3
OUT1POS
13
OUT2NEG
8
OUT2POS
6
SELECT
5
SVR
20
VCC1
16
IN1POS
14
IN2NEG
15
IN2POS
4
MODE
NC1
2
NC2
7
NC3
9
NC4
12
TDA8547
U420
1
GND1
10
GND2
17
IN1NEG
VR448
10.0V
J403-15
3
NU
10K
R499
Q411
2
64
1
M401
NU
C495
100pF
100pF
VR434
C494
390nH
6.8V
J403-17
L401
J403-20
100pF
C496
1K
R477
J403-12
J403-19
L400
390nH
10.0V
VR447
J403-9
C493
100pF
330
R434
VR433
5.6V
VR432
5.6V
C475
10uF
J403-11
100pF
C472
100pF
C473
VR445
10.0V
C476
10uF
J403-6
J403-2
J403-5
5V
Vdda
BOOT_CTRL
SWB+
AUDIO_PA_ENA EXT_SPKR_SEL
5V
FLAT_RX_SND
INT_MIC
OPT_SEL2
EXT_MIC
SCI_RX
SCI_TX
SWB+
RSSI
OPT_SEL1
A
UDIO
UNSWB+
FL0830462O
Figure 9-245. Low Band (29.7-42/35-50 MHz) Controller Audio PA Schematic Diagram

Motorola HT Series Specifications

General

Battery Type	Li-Ion
Waterproof	IP54
Operating Temperature	-30°C to +60°C
Frequency Range	VHF: 136-174 MHz
Number of Channels	16