Working Principle Analysis Of The Unit - Panasonic TH-L42U5D Service Manual

Working principle analysis of the unit

1. Tuner signals flow:
Antenna signal will be send to tuner SUT-RE216TN, t h e n T u n e r w i l l p r o v i d e t h e L o w I F
s i g n a l t o S c a l e r a n d demodulated by it.
After processing the signals then output LVDS level drive for panel display and I2S signal to Class-D
audio Amplifier for speaker out
2. Composite/Component signal flow
Composite signal and Component signal will be fed to MST6100VS 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 MST6100VS to bass
adjust and volume control, the sound signal be formed by I 2 S s i g n a l and provide to Class-D audio
Amplifier for speaker out.
3. PC signal flow
PC signal via terminal socket sent to MST6100VS A/D, PC output R/G/B of 24 bit to back end
module to Video decode, de-interlace and image scale, then send to LVDS level drive for panel
display.
Sound signal of PC t e r m i n a l via matched resistance a n d sent to MST6100VS to bass adjust and
volume control, the sound signal be formed by I 2 S s i g n a l and provide to Class-D audio Amplifier
for speaker out.
4. HDMI signal flow
Two HDMI video signals are directly fed to the master control IC MST6100VS to digital decode,
image scale, then output LVDS drive level for panel display. HDMI audio signal via decoder built-in
MST6100VS to bass adjust and volume control, the sound signal be formed by I 2 S s i g n a l and
provide to Class-D audio Amplifier for speaker out.
5. USB signal flow
USB signal via USB connector sent to MST6100VS and its A/D conversion to YPbPr output for
MST6100, then output R/G/B of 24 bit to back end module to Video decode, de-interlace and
image 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 MST6100VS to bass adjust and
volume control, the sound signal be formed by I 2 S s i g n a l and provide to Class-D audio Amplifier
for speaker out.
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