Sanyo LCD-32E30A, Руководство по обслуживанию

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Working principle analysis of the unit
1. PAL and DVB-T signals flow:
Antenna reception, B/G, I, D/K, DVB-T” signal will be send to tuner FQD1116ME, t h e n T u n e r w i l l
b e demodulating and output standard video signal TV-CVBS, DVB-T and sound IF signal (SIF).
TV-CVBS will send to the master control IC ZR39670HGCF to video decode, de-interlace and scaler,
then output LVDS level drive for panel display.
DVB-T will be fed into WJE6353, after OFDM demodulator, the digital signal will be transform into
MPEG transport stream out by DVB-T COFDM Terrestrial IC and sent to scaler IC ZR39670HGCF
processing, then output LVDS level drive for panel display.
The sound IF (SIF) will be fed into MSP4410K, after demodulating, pre-amplifying, bass adjusting
and volume control, the sound signal will b e tr a n s fo r m i n t o d ig i ta l I2 S s i gn a l b y Sound
Processor IC and sent to digital amplifier TAS5706 amplifying, then sent to speaker. About
Earphone output, MSP4410K will be sent analog signal to earphone amplifier TPA6110 then
output to Earphone.
2. AV/SV signal flow
SV signal and the Video1 path AV signal switch by menu “Setup”->“AV Connecting”->”Video1
input” via terminal socket, the signal and the Video2 path AV signal will be fed to ZR39670HGCF
to perform video decode, de-interlace and scaler, then output LVDS drive level for panel display.
Audio signal from AV/SV terminal via matched resistance is fed to MSP4410K to bass adjust and
volume control, the sound signal will be transform into digital I2S signal by Sound Processor IC and
sent to digital amplifier TAS5706 amplifying, then sent to speaker. About Earphone output,
MSP4410K will be sent analog signal to earphone amplifier TPA6110 then output to Earphone.
3. PC/YPrPb signal flow
PC and the Video3 path YPbPr signal are via terminal sent to ZR39670HGCF A/D conversion,
output R/G/B of 24 bit to back end module to digital decode, image scale, then send to LVDS
level drive for panel display.
Sound signal of PC/YPrPb t e r m i n a l via matched resistance a n d sent to MSP4410K to bass
adjust and volume control, the sound signal will be transform into digital I2S signal by Sound
Processor IC and sent to digital amplifier TAS5706 amplifying, then sent to speaker. About Earphone
output, MSP4410K will be sent analog signal to earphone amplifier TPA6110 then output to
Earphone.
4. HDMI signal flow
Three HDMI video signals via switcher Sil9185 are directly fed to the master control IC
ZR39670HGCF to digital decode, image scale, then output LVDS drive level for panel display.
HDMI audio signal via decoder built-in ZR39670HGCF is transform into digital I2S signal by scaler
IC, and sent to MSP4410K to bass adjust and volume control, the sound signal will sent to digital
amplifier TAS5706 amplifying, then sent to speaker. About Earphone output, MSP4410K will be
sent analog signal to earphone amplifier TPA6110 then output to Earphone.