Toshiba CN27E90 Technical Training Manual page 22

3-1-5. A.PRO Section (Audio Processor)
The S.PRO section has following functions.
(1) Woofer processing (L+R output)
(2) High band, low band, balance control
(3) Sound volume control, cyclone level control
(4) Cyclone ON/OFF
TA1217N
30
Lin
34
Rin
2
Cin
Win
3
20
SDA
21
SGL
16
17
R-in C-in
From From
A/V Dolby
27 29 22 32 33
1
TONE CONTROL
LPF
2
I C
4 5 6
18 19 20 21 22
L-in
SCL SDA W-out O-out
From Q670 Q640
A/V
Fig. 2-6 A.PRO block diagram
All these processing are carried out according to the BUS
signals sent from a microcomputer.
Fig. 2-6 shows a block diagram of the A.PRO IC.
30
Center
VOLUME
LEVEL
Woofer
LEVEL
D/A
CONV
7 31 24 23 22 19
24 26 27
23 25
L-out R-out
Q670 Q670
Via QS101
22
9 8 28
26 Lout
BALANCE
Rout
25
18 Cout
Wout
10
17
16
15
I/O
14
13
12
11
9V
SAP det.
STE det.