Controller Audio Power Amplifier Schematic Diagram - Motorola GP88s Service Manual

R423
470K(UHF),47K(VHF)
C447
R472
0.1uF
36K(UHF),3.6K(VHF)
AUDIO
Vddd
R467
10K
Q433
AUDIO_PA_ENA
UNSWB+
C475
10uF
U420
TDA8547
20 11
16 3
IN1POS OUT1POS
17 18
IN1NEG OUT1NEG
15 8
IN2POS OUT2POS
14 13
IN2NEG OUT2NEG
2
NC1
6 7
SELECT NC2
4 9
MODE NC3
5 12
SVR NC4
19
NC5
C476
10uF
C450
NU
Vdda
Q410
6 4
5V
1 2 3
INT_SPN
C489
NU
R473
10
C442
0.1uF
100pF(UHF),NU(VHF)
C486
C488
NU NU
MIC_LINE
SWB+
R471
5.6K
R438
0
R434
NU
C440
4.7uF
INT_MIC
C471
C470 C472
100pF 100pF
SPP
SPN
C485 C483 C484
100pF 100pF 100pF
R435
2K
Vddd
R436
47K(UHF),180K(VHF)
R495
Q420 100K
R496
Q421
100K
R439
100K

Controller Audio Power Amplifier Schematic Diagram

7-15
J402
1 J402-1 GND
2 J402-2 INT_MIC
3 J402-3 INT_SPN
4 J402-4 SPP
Speaker/Mic Connector
L400
390nH
MIC
C473
470pF
PTT_MIC
ZMY0130302-B