Block Diagram; Working Principle Analysis Of The Unit - Sanyo LCD-46XR10DKH Service Manual

Block diagram

Working principle analysis of the unit

1. PAL/SECAM signal flow
PAL/SECAM signal from antenna is inputted into TUNER FQD1116 which is an
analog-digital-integrative model, the RF signal is demodulated by the TUNER, then CVBS signal and
audio difference IF signal SIF are outputted. TUNER FQD1116 is controlled by main chip MSD209
through I2C bus.
TV CVBS signal is inputted into main chip MSD209 directly to be processed by modules "VIDEO
DECODER, DEINTERLACE , VIDEO PROCESS and SCALER", then LVDS signal is outputted to drive
LCD panel.
SIF audio signal is inputted into main chip MSD209 directly and processed by modules of
demodulation, pre-amplification, acoustic effect processing and volume control, then the audio signal are
inputted into earphone amplifiers BH3547F to be amplified and then be divided to two signals, one is
outputted to earphone jack, the other is inputted into D class audio power amplifier R2A15112FP to be
amplified and then be outputted to speakers.
2. DTMB signal flow
DTMB signal from antenna is inputted into TUNER FQD1116 to be lower frequency convterted, then
different IFsignal is outputted to deodulating chip LGS-8G42 to be demodulated and then be inputted
into main chip MSD209 with format of standard serial or parallel transport stream for de-multiplyiing and
decoding.
Video route: de-multiplex digital video signal is decoded and vidio processed by main chip MSD209
and then output LVDS signal to drive the panel.
Audio route: de-multiplex digital audio signal is decoded and audio processed by MSD209, then
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