JVC MX-GT98V Service Manual page 39

BA3837 (IC466) : Mic mixer
1.Block diagram
C
B
16
15
LOGIC
+
-
2
1
MIC
VCC
2.Pin function
Symbol
Pin No.
1 VCC
2 MIC IN
3 LOUT
4 FK
5 TK
6 LIN
7 BIAS
8 GND
9 RIN
10 LPF1
11 LPF2
12 LPF3
13 ROUT
14 CONTA
15 CONTB
16 CONTC
BA15218 (IC481, IC501, IC502, IC526, IC571) : Op. amp.
OUT1 1
-IN1 2 -
1
+IN1 3
+
V 4
EE
ROUT
A
14 13
+
-
SW2 SW1
- +
3
4
LOUT
FK
TK
I/O
Power supply
-
Microphone mixing input
I
Channel L output
O
Non connect
-
Non connect
-
Channel L input
I
Signal bias
I
Connect to GND
-
Channel R input
I
Connects to LPF time constant element
O
Connects to LPF time constant element
O
LPF outpout
O
Channel R output
O
Mode select input A
I
Mode select input B
I
Mode select input C
I
8 V
CC
7 OUT2
- 6 -IN2
2
+ 5 +IN2
MX-GT98V/MX-GT95V/MX-GT88V
LP LP LP
12 11 10
-
+
R
L+R
+
-
+
L-R
L
+ -
7
6
5
BIAS
LIN
Description
MX-GT85V/MX-G78V/MX-G75V
RIN
9
- +
8
GND
1-39