Sanyo LED-22XR10F, Руководство по обслуживанию

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Working principle analysis of the unit
Signal Flow
1
、
PAL/SECAM signal flow
Send PAL/SECAM analog RF signal received from antenna to TUNER FT21XX which is controlled
by main chip MSD209GL through I
2
C BUS; CVBS video signal and SIF audio differential signal will be
outputted after demodulation;
CVBS video signal is sent into main chip MSD209GL to be processed by modules of video decoding,
deinterlacing, video processing and zoom, then LVDS signal will be outputted to drive display panel;
SIF audio differential signal is sent into main chip MSD209GL to be demodulated to analog audio
signal, then it is sent to earphone amplifier BH3547F to be amplified after the processes of
preamplification, acoustic effect processing and volume control, and then it is divided into two, one is sent
to earphone jack, the other is sent to audio power amplifier
TAS5711 (D class) to be amplified and then
drive speakers.
2
、
DVB-T signal flow
Send DVB-T digital RF signal received from antenna to TUNER FT21
12
which is controlled by main
chip MSD209GL through I
2
C BUS; after down frequency conversion, differential IF signal will be inputted
into demodulator IC MSB1210 to be demodulated; then it will be sent to main chip MSD209GL with the
standard format of serial or parallel TS stream for demultiplexing and decoding;