Daewoo DWP-28W2ZZF Service Manual download pdf (Page 40)

Appendix Service manual WP-795

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59 ANA_IN1- In IF common

60 NC Not Connected

61 TESTEN In Test pin

62 XTAL_IN In Crystal oscillator

63 XTAL_OUT Out Crystal oscillator

64 NC Test pin

1-3 TDA894xJ Stereo Audio Amplifier

The TDA 8944J ( TDA 8946J ) is a dual-channel audio power amplifier with an output power of 2 x 7 W

( 2 x 15 W ) at an 8

Ω

load and a 12 V supply. The circuit contains two Bridges Tied Load (BTL)

amplifiers with an all-NPN output stage and standby/mute logic. The TDA8944J comes in a 17-pin DIL

power package.

Features

Few external components

Fixed gain

Standby and mute mode

No on/off switching plops

low standby current

High supply voltage ripple rejection

Outputs short-circuit protected to ground, supply and across the load

Thermally protected

Pin description

Pin Symbol Description

1 OUT1- negative loudspeaker terminal 1

2 GND1 ground channel 1

3 Vcc1 supply voltage channel 1

4 OUT1+ positive loudspeaker terminal 1

5 n.c. not connected

6 IN1+ positive input1

7 n.c. not connected

8 IN1- negative input1

9 IN2- negative input2

10 MODE mode selection input

11 SVR half supply voltage decoupling

(ripple rejection)

12 IN2+ positive input2

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 69 70

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Daewoo DWP-28W2ZZF Service Manual Page 40