Service manual

SERVICE MANUAL

Universal Hi-Fi Audio Processor for TV TDA9859

1. Features

·Multi-source selector switches six AF inputs

(three stereo sources or six mono sources).

·Each of the input signals can be switched to

each of the outputs (crossbar switch).

·Outputs for loudspeaker channel and peri-TV

connector (SCART).

·Switchable spatial stereo and pseudo stereo

effects

·Audio surround decoder can be added

externally

·Two general purpose logic output ports

·I

C-bus control of all functions.

2. General Description

The TDA9859 provides control facilities for the

main and the SCART channel of a TV set. Due

to extended switching possibilities, signals

from three stereo sources can be handled.

3． Block Diagram

　(1) For extended bass control the capacitor between C

BR/L1

and C

BR/L2

should be

replaced by the extended bass control network.

Fig. 29 Block Diagram and Application Circuit.

4. Refer to Table 23 about Functions and Service Data of the IC’s Pins.