Mic Circuit - Panasonic SA-PT170PH Service Manual

17.8. Mic Circuit

1 2 3
SCHEMATIC DIAGRAM - 16
A
I
MIC CIRCUIT
: +B SIGNAL LINE
B
C
JK7002
2
3
MIC 2
7
8
D J0JBC0000019
1
E
JK7001
2
3
MIC 1
7
8
1
F
G
H
1 2 3
4 5 6
: -B SIGNAL LINE : MIC AUDIO INPUT SIGNAL LINE
L7002 R7001 R7003 C7003
J0JBC0000030 1
680 0
R7005
1K
L7001
J0JBC0000030
L7004
CHASSIS
L7006 R7116
J0JBC0000030 680
C7101 R7100
1 15K
L7007
J0JBC0000019
L7005
J0JBC0000019
Q7100
B1GBCFJJ0051
MUTING
4 5 6
7 8 9
R7015 C7015
1K 1
R7009
100K
C7010 C7009
47P
150P
4 3 2 1
V-
IC7000
C0ABBB000189
OP-AMP (MIC)
V+
5 6 7 8
C7005 C7006
47P 100P
R7010
100
R7006
Q7002
82K
Q7001
B1GBCFJJ0051
B1GBCFJJ0051
B1GBCFJJ0051
SWITCH
SWITCH
C7028
100P
D7003 D7004
MA2J11100L MA2J11100L
R7019
4.7K
IC7100
C1AB00002773
ECHO PROCESSOR
L7008
C7111
J0JBC0000019
16V47
R7101 10K
16 LPFIN VCC 1
C7103
560P
R7102 10K
15 LPF1OUT VREF 2
C7112
C7110
16V47 0.1
R7104 15K
14 LPF2OUT AGND 3
C7108
560P
R7103 10K C7020
13 LPF2IN DGND 4
0.1
R7105 10K
12 OP2OUT CLK_O 5
C7109
0.082
11 OP2IN VCO 6
10 OP1IN CCI 7
C7104
0.082
9 OP1OUT CCO 8
C7113 1 R7109 10K
Q7101 Q7102
B1GBCFJJ0051 B1GBCFJJ0051
SWITCH SWITCH
7 8 9
114
10 11 12
C7014
R7011
0.47
0
C7018 C7019
0.1 0.1
C7012
R7008 H7000*
1 100
1 MIC_IN
2 +7V
Q7003
3 AGND
4 -7V
SWITCH
5 MIC_SW
6 MIC LVL 1
7
MIC LVL 2
8 ECHO LVL 1
9 ECHO LVL 2
10 ECHO MUTE
D7005
MA2J11100L
R7107
68
D7100
MAZ80510ML
10 11 12
13 14
A
B
C
B
TO
MAIN CIRCUIT
(CN2005)
IN SCHEMATIC
DIAGRAM - 7
D
E
F
G
SA-PT170PH/PR MIC CIRCUIT
H
13 14