JVC MX-K50 Service Manual page 42

MX-K50
BA3837 (IC301
(on the voice board)
1.Block diagram
C
16
LOGIC
1
MIC
VCC
2.Pin function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1-42
) : MIC mixer
B ROUT
A
15 13
14
+
-
SW2
-
+
+
-
2 3 4
LOUT
FK
Symbol
I/O
Power supply
VCC
-
Microphone mixing input
MIC IN
I
Channel L output
LOUT
O
Non connect
FK
-
Non connect
TK
-
Channel L input
LIN
I
Signal bias
BIAS
I
Connect to GND
GND
-
Channel R input
RIN
I
Connects to LPF time constant element
LPF1
O
Connects to LPF time constant element
LPF2
O
LPF outpout
LPF3
O
Channel R output
ROUT
O
Mode select input A
CONTA
I
Mode select input B
CONTB
I
Mode select input C
CONTC
I
LP LP LP
12 11 10
-
+
R
L+R
+
-
SW1
+
L-R
L
+ -
7
6
5
BIAS
LIN
TK
Function
RIN
9
- +
8
GND