Mic Circuit - Panasonic SA-VK460GS Service Manual

18.4. (D) Tact Switch Circuit, (E) Mic Circuit & (G) Deck Mechanism Circuit
1 2 3
SCHEMATIC DIAGRAM - 11
A
D
TACT SWITCH CIRCUIT
R6211 R6210 R6209 R6208 R6207 R6206 R6205
22K 10K 6.8K 4.7K 2.7K 2.2K 1.8K
B
R6492
47K
R6493
10K
3
2
1 R6491
47K
VR6491
EVEKE2F2524B
C
VOLUME JOG
1 NC
2 KEY2
3 VREF+
4 VJOG_A
5 VJOG_B
6
GND
D
7 MPORT_SW|
E
G
DECK MECHANISM CIRCUIT
PL970
IC971
CNB13030R2AU
PHOTO INTERRUPTOR D971
R972 D1_CRO2
MA2C16500E
820
R973
39K
PHOTO_T
F
STBY_5V
VREF_GND
PHOTO_S
7 6 5 4 3 2 1
Z971
RGSD12A1445T
G
IC951
PL971
CNB13030R2AU MODE
PHOTO INTERRUPTOR
D951
D1_CRO2
MA2C16500E
R952
820
PHOTO_T
R953
S952 HALF
39K
STBY_5V
VREF_GND
H
PHOTO_S
1 2 3
4 5 6
E
: +B SIGNAL LINE
R6204 R6203 R6202
1.2K 1K 1K
MIC
H6557
C
TO
PANEL CIRCUIT
(H6901)
IN SCHEMATIC
DIAGRAM - 9
: +B SIGNAL LINE
MODE
PL
GND
HALF
CN971
10
PL2
1
PL1
2
STBY_5V
3
PL_GND
C
4
TO
AD_OUT
5
PANEL CIRCUIT
PHOTO_PB
(CN6401)
6
IN SCHEMATIC
PHOTO_RP
7 DIAGRAM - 9
HALF_PB
8
PL
VREF_GND
9
GND
MODE_PB
10
1
HALF
4 5 6
7 8 9

MIC CIRCUIT

: +B SIGNAL LINE : MIC SIGNAL LINE
JK6902
5
4
2
3
6
R6901 W6885
7
0
680
R6903
560
1
C6901
0.022
R6962
4.7K
7 8 9
89
10 11 12
W8881 0
W6887
L6902
G0C100JA0052
C6912
50V1
Q6901
B1ABCF000176
C6910
MIC AMP 50V0.1
C6914
Q6902 100P
W6884
0 B1ABCF000176
MIC AMP
C6911
0.056
C6938
0.1
SA-VK460GC/GCS/GCT/GS TACT SWITCH / MIC / DECK MECHANISM CIRCUIT
10 11 12
SA-VK460GC / SA-VK460GS / SA-VK460GCS / SA-VK460GCT
13 14
A
H6900
1 GND2
2 MIC_VOL
C
TO
3 MIC_SW
PANEL CIRCUIT
(H6556)
4 MIC_MUTE
IN SCHEMATIC
0
5 MIC_GND
DIAGRAM - 10
B
6 +9V
7 NC
W6883
0
R6913
330
Q6903
C
B1ABCF000176
MIC AMP
R6914
R6911
0
100
W6882 C6915
0 50V0.33
D
E
F
G
H
13 14