Panasonic TC-L39EM6X Service Manual

Contents

Panasonic TC-L39EM6X Service Manual Manual pdf 12 page image

12Working principle analysis of the unit1. NTSC signals flow:Antenna sig nal will be send to tuner TDST-H021F, t h e n T u n e r w i l l b edemodulating andoutput standard video signal TV-CVBS, and sound SIF signal .TV-CVBS will send to the master control IC MT5385 to video decode, de-interlace and scaler, thenoutput LVDS level drive for panel display.The sound IF (SIF) will be fed into MT5385, after demodulating, pre-amplifying, bass adjusting andvolume control, the sound signal w i l l b e t r a n s f o r m i n t o d i g i t a l I 2 S s i g n a land sent todigital amplifier TAS5707.2. Composite/Component signal flowComposite signal an d Compo nentsignal will be fed to MT5385 to perform video decode, de-interlace and scaler, then output LVDS drive level for panel display.Audio signal from Composite/Component terminal via matched resistance is fed to MT5385 to bassadjust and volume control, the sound signal will b e t r a n s f o r m i n t o d i g i t a l I 2 S s i g n a l and sentto digital amplifier TAS5707.3. HDMI signal flowTwo HDMI video signals are directly fed to the master control IC MT5385 to digital decode, imagescale, then output LVDS drive level for panel display. HDMI audio signal via decoder built-in MT5385 tobass adjust and volume control, the sound signal will b e t r a n s f o r m i n t o d i g i t a l I 2 S s i g n a l andsent to digital amplifier TAS5707.4. USB signal flowUSB signal via USB connector sentto MT53 85 and its A/D conversion to YPbPr output forMT5385, t hen output R/G/B of 24 bit to back end module to Video decode, de -interlace andimage scale, then send to LVDS level drive for panel display.Sound signal of USB signal v i a matched resistance a n d sent to MT5385 to bass adjust andvolume control, the sound signal will b e t r a n s f o r m i n t o d i g i t a l I 2 S s i g n a l and sent to digitalamplifier TAS5707.5. SPDIF signal flowThe master control IC MT5385 will transfer digital sound signal out by format Dobly Digital or PCM.