JVC MX-J570V Service Manual page 52

MX-J570V/MX-J680V
TDA7439 (IC436) : Conrtol volume
1.Pin layout
SDA
1
CRE
2
Vs
3
AGND
4
ROUT
5
LOUT
6
R-IN4
7
R-IN3
8
R-IN2
9
R-IN1
10
L-IN1
11
L-IN2
12
L-IN3
13
L-IN4
14
MUXOUTL 15 TDA7439
2.Block diagram
L-IN1
11
L-IN2
12
L-IN3 13
0/30dB
L-IN4
14
2dB STEP
R-IN1
10
R-IN2
9
R-IN3
8
R-IN4
7
INPUT
MULTIPLEXER
GAIN
1-52
CSL
30
DIG GND
29
TREBLE(R)
28
TREBLE(L)
27
MIN(L)
26
MOUT(L)
25
BOUT(L)
24
BIN(L)
23
BOUT(R)
22
BIN(R)
21
MOUT(R)
20
19 MIN(R)
18 INR
17 MUXOUTR
16 INL
15 16 27
G TREBLE
VOLUME
2
I C BUS DECODER LATCHES
G VOLUME
TREBLE
28
17 18
23
26 25
24
SPEAKER
MIDLE BASS ATT
LEFT
SPEAKER
MIDLE
BASS ATT
RIGHT
19 20 21 22
4 AGND
30
SCL
1
SDA
29
DIG-GND
5
ROUT
3
Vs
SUPPLY
4
AGND
2