Sanyo 1 682 351 01 Service Manual

Working Principle of the Unit1、 ATV PAL signal flowReceive RF PAL analog signal and sent it to XC5200C (D/A silicon Tuner controlled by main chipMSD309PX through I 2C bus) to be demodulated, then differential IF signal is send out to main chipMSD309PX analog demodulation to be demodulated to get analog CVBS video signal and SIF soundsignal.CVBS video signal is processed by back-end video decoder, anti-interlacing part, video processorand zoom controller, then LVDS signal is outputted to drive display panel.SIF sound signal is processed by back-end demodulator to get analog sound signal, then processedby pre-amplifier, acoustic effect processor and volume controller to get two parts of signals: the analogpart of signal is sent to earphone amplifier BH3547F to be amplified and then outputted to earphone jack;the digital part of signal I2S is sent to digital audio power amplifier TAS5711 to be processed by D/Aconverter and power amplifier, then outputted to drive speakers.2、 DVB-T signal flowReceive RF DVB-T digital signal and sent it to XC5200C (D/A silicon Tuner controlled by main chipMSD309PX through I 2C bus) to be processed by down-frequency-conversion, then differential IF signal issend out to main chip MSD309PX digital demodulation to be demodulated, then standard paralleltransmission flow is outputted to back-end demultiplexer and decoder to be processed.Video channel: demultiplexing digital video signal is processed by MSD309PX decoder and videoprocessor, then LVDS signal is outputted to drive display panel;Audio channel: demultiplexing digital audio signal is processed by MSD309PX decoder and audioprocessor, then double-sound-track analog audio signal (stereo) is outputted to MSD309PX to beprocessed by preamplifier, acoustic effect processor and volume controller to get two parts of signals: theanalog part of signal is sent to earphone amplifier BH3547F to be amplified and then outputted toearphone jack; the digital part of signal I2S is sent to digital audio power amplifier TAS5711 to beprocessed by D/A converter and power amplifier, then outputted to drive speakers.3、 AV input signal flowAV video signal is inputted to main chip MSD309PX to be processed by video decoder,anti-interlacing part, video processor and zoom controller, then LVDS signal is outputted to drive displaypanel;AV audio signal is processed by voltage divider, resistance matcher and AC coupler, then sent tomain chip MSD309PX to be processed by acoustic effect processor and volume controller to get two partsof signals: the analog part of signal is sent to earphone power amplifier BH3547F to be amplified andthen outputted to earphone jack; the digital part of signal I2S is sent to digital audio power amplifierTAS5711 to be processed by D/A converter and power amplifier, then outputted to drive speakers.4、 D-SUB/YPbPr input signal flowD-SUB、YPbPr video signal is inputted to main chip MSD309PX to be processed by A/D convertor,video decoder, anti-interlacing part, video processor and zoom controller, then LVDS signal is outputted todrive display panel;D-SUB、YPbP audio signal is processed by voltage divider, resistance matcher and AC coupler, then