JVC MX-G50 Service Manual page 43

TDA7442D (FIC1) : Audio processor
1.Pin layout
R_IN3 1
R_IN2 2
R_IN1 3
L_IN1 4
L_IN2 5
L_IN3 6
L_IN4 7
MUXOUTL 8
IN(L) 9
MUXOUT(R) 10
IN(R) 11
BIN(R) 12
BOUT(R) 13
BIN(L) 14
2.Block diagram
MUXOUT(L)
0.47 F 31.5dB
4
control
L-IN1
50K
0.47 F
5
L-IN2
50K
0.47 F
6
L-IN3
50K
0.47 F
7
L-IN4
50K
0.47 F
3
R-IN1
50K
0.47 F
2
R-IN2
50K
0.47 F
1
R-IN3
50K
0.47 F
28
R-IN4
31.5dB
50K
control
MUXOUT(R)
28 R_IN4
27 LOUT
26 ROUT
25 AGND
24 V
S
23 CREF
22 SDA
21 SCL
20 DIG-GND
19 TREBLE(R)
18 TREBLE(L)
17 PS1
16 LP
15 BOUT(L)
100nF
2.2 F
PS1
8 9 17
RPS1
30K
PS1
90Hz
- SYMULATED
+ + L+R
MUSIC
OFF
- L-R
+
LPF EFFECT
9KHz CONTROL
30K
10 11 16 24
LP V S
1.2nF
2.2 F
5.6K
5.6nF 100nF
TREBLE-L BIN(L)
18 14
RB
OFF
SURR
MUSIC/
SYMULATED
MIXING
TREBLE BASS
AMP
I 2 C BUS DECODER + LATCHES
TREBLE BASS
MIXING
AMP
SURR
OFF
Vref
SUPPLY
RB
25 23 19 12
CREF TREBLE-R BIN(R)
22 F
100nF
5.6nF
5.6K
MX-G50/MX-G56
100nF
BOUT(L)
15
FIX
79dB CONTROL
SPKR
VAR -
ATT
27
+ LOUT
FIX
MUTE
21
SCL
22
SDA
20
DIG GND
FIX
SPKR
+
VAR
ATT
26
- ROUT
MUTE
79dB CONTROL
13
BOUT(R) D98AU947A
100nF
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