Sanyo HT28745 - Page 51

IC3401 AUDIO CONTROL BLOCK DIAGRAM
— 51 —
IN1a
MONa
MONb
SEL
-2dB-2dB
AGC
AGC SR FIL
1
IN2a
2
IN3a
3
IN4a
4
VOL 1 TONE
TONE
NJRC
Surround
"eala"
&
Simulated
Stereo
IN1b
SEL
30
5 20
IN2b
29
IN3b
28
IN4b
27
26
TONE
-Hb
24
VOL 1
VOL 2
IICBUS
Interface
VOL 2
6
OUTa
10
LINEa
OUTb LINEb Vref
Vcc
7 8
+4.5dB+4.5dB
TONE
-Lb
TONE
-Ha
TONE
-La
23 17
16
GN
D
15
CSR
25
CTL
18
CTH
19
CVB
12
CV
A
11
SCL
14
SD
A
13
9
21 22
Bias