Beko Plasma TV Manuel de service télécharger pdf (Page 38)

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BUS

DECODER

DATA GNDCLOCK V

TTX LUMA

CHROMA

POWER

PIP MAC

DEC.

GND

CVBS

(AM TUNER)

MAC SIGNAL

(AMTUNER)

CVBS

(FM TUNER)

MAC SIGNAL

(FM TUNER)

SYNCHRO

(TTX/BTX)

PERI

TV1

PERI

TV2

CVBS

(PERI PLUG2)

PROG

CVBS

(PERI PLUG1)

CVBS

(MAC/DEC)

6415C-02.EPS

BLOCK DIAGRAM

The mainfunctionof theICis toswitch 8 video input

sources on 6 outputs.

Each output can be switched on only one of each

input. On each input an alignment of the lowest

level of the signal is made (bottom of synch. top for

CVBS or black level for RGB signals).

Each nominal gain between any input and output

is 6.5dB. For D2MAC or Chroma signal the align-

ment is switched off by forcing, with an external

resistor bridge, 5 V

on the input. Each input can

be used as a normal input or as a MAC or Chroma

input (with external resistor bridge). All the switch-

ing possibilities are changedthrough the BUS.

Driving 75Ω load needs an external transistor.

It is possible to have the same input connected to

several outputs.

The starting configuration upon power on (power

supply : 0 to 10V) is undetermined.

In this case, 6 words of 16 bits are necessary to

determine one configuration.In other case, 1 word

of 16 bits is necessary to determine one configura-

tion.

GENERAL DESCRIPTION

TEA6415C

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Beko Plasma TV Manuel de service Page 38

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