Sanyo LCD-19XR9DA Service Manual

Also see for LCD-19XR9DA: Instruction manual

Contents

Sanyo LCD-19XR9DA Service Manual Manual pdf 14 page image

Working principle analysis of the unit1. PAL/SECAM signal flow:Antenna reception PAL/SECAM signal will be send to tuner TDA1616, which contains frequencyturning, HF and IF amplifier circuit and is controlled by master control IC MSD119 (comprises CPU)through I2C bus. The analog IF signal via intermediate frequency amplifying, video SAW filterK3953 and audio SAW filter K9656 to input to analog demodulate IC (IF) R2A10406NP, afterdemodulating and output standard video signal TV-CVBS and sound IF signal (SIF).TV-CVBS will send to the master control IC MSD119 to video decode, deinterlace and scale, thenoutput LVDS level drive for LCD panel.The sound IF (SIF) will be fed into MSD119, after demodulating, pre-amplifying, bass adjusting andvolume control, the sound signal will separate into L/R channels and input to operational amplifierAZ4558 amplifying, then output two ways. One way will be sent to earphone, another will be sent toclass AB sound amplifier TDA7266SA amplifying then sent to speaker.2. DVB-T signal flow:Antenna reception DVB-T signal will be sent to tuner TDA1616, after frequency tuning, HFamplification, IF amplification and SAW FILTER, output IF signal to demodulation chip CE6353, viaQAM demodulation, fed to MSD119 for information source decoding in the format of standard serialTS stream.HD video signal via decoding to A/D conversion and OSD superposition, at last output LVDS drivelevel for panel display.HD audio signal via decoder built-in MSD119, resumed to multi- channel sound of Dolby AC-3. Theaudio signal will be sent to back end to perform bass adjustment and volume control, then it willseparate into L/R channels and input to operational amplifier AZ4558 amplifying, another way willbe sent to class AB sound amplifier TDA7266SA amplifying then sent to speaker.3. AV signal flowAV signal will be fed to MSD119 to perform video decode, deinterlace and scale, then output LVDSdrive level for panel display.Audio signal from AV via matched resistance, is directly sent to MSD119 to bass adjust and volumecontrol, the sound signal will separate into L/R channels and input to operational amplifier AZ4558amplifying, then output two ways. One way will be sent to earphone, another will be sent to class ABsound amplifier TDA7266SA amplifying then sent to speaker.4. PC/YPrPb signal flowPC and YPbPr signal will be sent to MSD119 A/D conversion, output R/G/B of 24 bit to back endmodule to digital decode, image scale and OSD superposition, then send to LVDS level drive forpanel display. Sound signal of PC/YPrPb via matched resistance and a-c couple to MSD119 to bassadjust and volume control, the sound signal will separate into L/R channels and input to operationalamplifier AZ4558 amplifying, another will be sent to class AB sound amplifier TDA7266SAamplifying then sent to speaker.5. HDMI signal flowHDMI video signal is directly fed to the master control IC MSD119 to digital decode, image scale12