Sanyo LCD-46XR11F, Service Manual

Working Principle of the Unit   

1

、

 ATV  PAL signal flow 

Receive RF PAL analog signal and sent it to

 XC5200C

 (D/A silicon Tuner controlled by main chip 

MSD309PX

 through I

2

C bus) to be demodulated, then differential IF signal is send out to main chip 

MSD309PX

 analog demodulation to be demodulated to get analog CVBS video signal and SIF sound 

signal. 

CVBS video signal is processed by back-end video decoder, anti-interlacing part, video processor 

and 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 processed 

by pre-amplifier, acoustic effect processor and volume controller to get two parts of signals: the analog 
part of signal is sent to earphone amplifier 

MAX9820 

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/A 

converter and power amplifier, then outputted to drive speakers. 

2

、

  DVB-T signal flow   

Receive RF DVB-T digital signal and sent it to

 XC5200C

 (D/A silicon Tuner controlled by main chip 

MSD309PX

 through I

2

C bus) to be processed by down-frequency-conversion, then differential IF signal is 

send out to main chip 

MSD309PX

 digital demodulation to be demodulated, then standard parallel 

transmission flow is outputted to back-end demultiplexer and decoder to be processed. 

Video channel: demultiplexing digital video signal is processed by 

MSD309PX 

decoder and video 

processor, then LVDS signal is outputted to drive display panel; 

Audio channel: demultiplexing digital audio signal is processed by 

MSD309PX 

decoder and audio 

processor, then double-sound-track analog audio signal (stereo) is outputted to

 MSD309PX 

to be 

processed by preamplifier, acoustic effect processor and volume controller to get two parts of signals: the 
analog part of signal is sent to earphone amplifier 

MAX9820 

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/A converter and power amplifier, then outputted to drive speakers. 

3

、

  AV input signal flow 

AV 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 display 
panel; 

AV audio signal is processed by voltage divider, resistance matcher and AC coupler, then sent to 

main chip 

MSD309PX 

to be processed by acoustic effect processor and volume controller to get two parts 

of signals: the analog part of signal is sent to earphone power amplifier 

MAX9820 

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/A converter and power amplifier, then outputted to drive speakers. 

 
4

、

  D-SUB/YPbPr input signal flow 

D-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 to 
drive display panel; 

D-SUB

、

YPbP audio signal is processed by voltage divider, resistance matcher and AC coupler, then