JVC CA-MXS6MDR Service Manual page 66

CA-MXS6MDR
SP-MXS6MD
TDA7439 (IC671) : 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
1-66
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
19 20 21 22
LOUT
6
30
SCL
1
SDA
29
DIG-GND
5
ROUT
3
Vs
SUPPLY
4
AGND
2