Panasonic SA-MAX3500PU - Microphone Circuit Schematic

74
12.19. Mic Circuit
A
1
2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14
C
D
B
E
G
H
F
A
C
D
B
E
G
H
F
G
MIC CIRCUIT
SCHEMATIC DIAGRAM - 18
SA-MAX3500PU
A
TO
MAIN (IO EXPANSION)
CIRCUIT (P1803)
IN SCHEMATIC
DIAGRAM - 3
: +B SIGNAL LINE
: MIC SIGNAL LINE
MIC 2
MIC 1
LB1400
J0JBC0000019
0
R1409
R1422
0
0.01
C1441
LB1405
0
C1438
50V0.1
C1445
1
C1408
50V2.2
R1402
100
R1401
6.8K
C1407
0.01
R1414
100
C1424
50V2.2
R1400
330
R1411
270
5423781
JK1403
R1415
6.8K
C1425
0.01
J0JBC0000019
LB1404
R1408
330
R1407
270
C1444
1
C1415
50V0.1
R1423
0
0
R1410
C1416
0.01
LB1406
0
5423781
JK1401
R1412
680
MIC_GND
PW_FL_SW12V
0
LB1401
680
R1413
R1421
220
47P
C1402
R1435
0
50V1
C1427
C1435
16V10
C1428
50V4.7
C1405
50V1
C1436
50V1
R1419
100K
C1404
50V4.7
R1418 100K
47P
C1430
C1434
16V10
50V4.7
C1432
564 123
9 11 13 141210
7
8
IC1400
C1AB00003130
C1401
50V4.7
R1405 100K
C1412
16V10
R1433
0
220
R1420
MIC_IN
MIC_DET_1
MIC_GND
MIC_DET_2
2
4
3
1
6
5
CN1401
MIC_GND
MIC_IN
PW_FL_SW12V
MIC_GND
C1411
16V10
C1413
50V1
R1406
100K
MIC_DET_1
564 123
9 11 13 141210
7
8
IC1401
C1AB00003130
MIC AMPLIFIER
MIC AMPLIFIER
MIC_DET_2
V+ VREF
VREF V+
BUFFIN
BUFFGAIN
BUFFOUT
GND
MIC_GND
MIC_IN
MIC_GND
MIC_DET_2
PW_FL_SW12V
MIC_DET_1
GND
BUFFIN
BUFFGAIN
BUFFOUT
IN SENSE INT GAIN SW
IN
GAIN1
DET
INT
OUT
SENSE GAIN SW
GAIN2 GAIN1
OUT
GAIN2
DET