Hln6837E Astro Spectra Plus Audio/Dc Discrete Schematic - Motorola ASTRO Digital Spectra Plus Detailed Service Manual

Schematics, Component Location Diagrams and Parts Lists: ASTRO Spectra Plus VOCON Section
AUDIO DC BLOCK DISCRETE
EEPOT_CS
EEPOT_U_D*
EEPOT_INC*
EEPOT_CS_2
C429
150pF
R437
22K
VCC5.0
2 8
MAI
R406
100K 3
4
C404
33pF
VCC2.85
R434
2K
DCLK I
RX I
FSYNC I
CODEC_PWR_DOWN I
TX O
VCC2.85
C420
0.1uF
*Y400*
KT19
16.8MHz
R430
0
1
WARP VCON OUT
R421
0
DNP
CLOCK GEN
6881076C25-E
VCC2.85
C400
0.1uF
U400
MAX5160
7 3
CS H
2 5
U_D W
1 6
INC L
VCC5.0
R438
22K
R400
3.3K
C403
150pF
R407
10K
6
1
C402
5
U404-1 1uF
MC33202
R443
10MEG
VCC2.85
C444
C439
R456
100pF
R441
15pF
0
470K
3
*U409*
R435 L400
1K
1uH
2 4
C440
12pF
1
DNP NC
R442
470K
VCC2.85 74AHC1G04
R426
4 1
R427 470K
10MEG
NC
1
VCC GND
Y401
5 3
C422
CC4V
0.1uF
32.768KHz
2
R425
U408
2 10MEG
TC7SU04F
VCC2.85
C401 VCC2.85
0.1uF
U401
MAX5160
7 3
CS H
2 5
U_D W
1 6
INC L
R401
3.3K
VCC2.85
R409
C428
100K
0.1uF
8
7
U404-2 R408
4 C405
18K
MC33202
0.1uF
1.8V, 2.85V, 3.0V, and 1.55V Regulators
VCC5.0
C432
R451
.01uF
39K
R452
20K
8
INPUT
7
FEEDBACK
3
SHUTDOWN
C430 C431
4.7uF 0.1uF
R428
R436
100
0
VCC5.0
C436
.01uF
R454
C427 33K
100pF
R455
47K
8
INPUT
7
FEEDBACK
3
SHUTDOWN
C434 C435
4.7uF 0.1uF
C424
12pF
C423
12pF
VCC2.85
C441
R403 0.1uF
0
R402 C425
100K 4.7uF
9
BCLKR
12
BCLKT
11
MCLK
R404
5.1K
8 2
DR RO_NEG
7
FSR
10 U402
PDI
MC145483
14
FST
4
PO_NEG
3 5
PI PO_POS
R429
18 17
0
TI_NEG TG
19 13
DNP
TI_POS DT
16
HB
R416
0
1 20
VAGREF VAG
C406
0.1uF
R410
10K
VCC5.0
U412
C407
53D46
.01uF
2 1
INPUT OUTPUT
5 4
CD
NC
C438
5V voltage detect
.01uF
VCC1.8 VCC5.0
R457
33K
R419
U410 0
LP2951CD
8
INPUT
1 7
OUTPUT FEEDBACK
5 3
ERROR SHUTDOWN
C445 C446
2
SENSE
4.7uF 0.1uF
6
VTAP
C433 C415
0.1uF 4.7uF
VCC3.0
R459
VCC5.0 VCC5.0 39K
R420
C449
U411 0
1uF
LP2951CD
NP
1
OUTPUT
5
ERROR
2
SENSE
C437 C417 C506
6 C505
R462
VTAP
0.1uF 4.7uF 0.1uF
150uF
0

HLN6837E ASTRO Spectra Plus Audio/DC Discrete Schematic

7-79
VCC2.85
U409-2
PWR_GND
5
C442 VCC
0.1uF
GND
3
R405 Ana / Dig Ground Conn.
2.2K
1 2
I1 I2
SIGNAL_CONVERT
SC400
SDO
C228 C229
470pF 470pF
DNP
Reset out
CLIH
32k_CLK
C447
.01uF
VCC2.85
R458
U413
43K
LP2951CD
1
OUTPUT
5
ERROR
2
SENSE
6
C448
VTAP
150uF
LV_DETECT
C507
.01uF
VCC1.55
R460
U414
10K
LP2951CD
8 1
INPUT OUTPUT
7 5
FEEDBACK ERROR
3 2
SHUTDOWN SENSE
C508
6
VTAP 4.7uF
R461
100
September 5, 2008