JVC Mx-GT80 Service Manual page 47

TDA7439 (IC436) : Control 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
G
L-IN2
12
L-IN3
13
0/30dB
L-IN4 14
2dB STEP
R-IN1
10
R-IN2 9
G
R-IN3 8
R-IN4
7
INPUT
MULTIPLEXER
GAIN
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
MIN(R)
19
INR
18
MUXOUTR
17
16 INL
15 16 27
TREBLE
VOLUME
2
I C BUS DECODER LATCHES
VOLUME
TREBLE
17 18 28
23
26 25 24
SPEAKER
MIDLE
BASS ATT
LEFT
SPEAKER
MIDLE
BASS
ATT
RIGHT
21 22
19 20
MX-GT80/MXGT90
LOUT
6
30
SCL
1
SDA
29 DIG-GND
5
ROUT
3
Vs
SUPPLY
4
AGND
2
1-47