Daewoo TVZ 1321, Service Manual

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IU01 (BA7790LS)
1. FUNCTION
(1) Circuit essential for a standard sound signal processing system as a PB AMP, REC AMP, ALC circuit, EQ selecting
switch and high voltage head switch have been integrated onto a single 1 chip.
(2) Built-in LINE/TUNER INPUT selecting switch.
(3) Built-in summary 3 mode EQ switch and it can be obtained EQ characteristics of each mode.
(4) PB AMP is low noise and high performance.
(5) Built-in ALC circuit with variable ALC level setting.
(6) No shock noise or ALC attack noise is generated when power source is turned ON or the mode is changed by means
of a ALC loop outside mute system.
2. Absolute Maximum Ratings (Ta = 25
°
C)
Derate 4.0mW/
°
C for the operating above Ta = 25
°
C
3. Recommended Operational Conditions (Ta = 25
°
C)
62
PIN MODE STOP REC PLAY REW/FWD REV/FF PAUSE STILL
1 0 0 0 0 0 0 0
2 4.6 4.6 4.6 4.6 4.6 4.6 4.6
3 0 0 0 0 0 0 0
4 0 0 0 0 0 0 0
5 11.2 11.2 11.2 11.2 11.2 11.2 11.2
6 4.7 4.7 4.7 4.7 4.7 4.7 4.7
7 11.4 11.4 11.4 11.4 11.4 11.4 11.4
8 4.7 4.7 4.7 4.7 4.7 4.7 4.7
9 0 0 3.8 0 3.7 0 0
10 4.7 4.7 4.7 4.7 4.7 4.7 4.7
11 0.6 0.6 5.2 0.6 5.2 0.6 5.2
12 5.3 5.3 5.3 5.3 5.3 5.3 5.3
13 4.6 4.6 4.6 4.6 4.6 4.6 4.6
14 0.6 0.6 0 0.5 0 0.5 0
15 5.4 5.4 5.3 5.4 5.3 5.4 5.4
16 5.3 5.3 5.3 5.3 5.3 5.3 5.3
17 0 0 0 0 5 0 5
18 5.3 5.3 5.3 5.3 5.3 5.3 5.3
19 5.4 5.4 5.3 5.3 5.4 5.4 5.4
20 0 0 0 0 0 0 0
21 5.4 5.4 5.3 5.4 5.4 5.4 5.4
22 5.4 5.4 5.3 5.4 5.4 5.3 5.3
23 0 0 0 1 0 0 0
24 0.5 5.2 0.5 0.5 0 0.5 0.5
Parameter Symbol Limits Unit
Supply voltage Vcc 13 V
Power dissipation Pd 400 mW
Operating temperature Topr -10~+65
°
C
Storage temperature Tstg -55~+125
°
C
Parameter Symbol Range Unit
Power supply voltage Vcc 7.5~12.5 V
AUDIO IC BA7790LS
4. Pin