LG 42LV4400, Руководство по обслуживанию

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CONFIDENTIAL – DO NOT COPY
Page 7-1
File No. SG-0000034
Chapter 7 Theory of Circuit Operation
The route of D-SUB 15pin input
An RGB (analog) signal is inputted the D-SUB 15pin to the MT5376 which transfers it to a digital
signal by the A/D converter. Then MT5376 generates a Low Voltage Differential Signal (LVDS) for
display device. The Extended Display Identification (EDID) code is recorded in EEPROM.
The route of HDMI CON input
A HDMI (Digital) signal is inputted the HDMI 1,2 & 3 CON to the PI3HDMI301 switch. The
passing signal is processed with the MT5376. Then MT5376 generates a LVDS for display device.
The route of HDTV & Component input
HDTV & Component signal is inputted to the MT5376.After processing, MT5376 generates a LVDS
for display device. The audio signal is inputted
MT5376. After processing, MT5376 transmits the
signal to audio output. an audio amplifier and line out.
The route of CVBS input
The CVBS signal is inputted to the MT5376.After processing, MT5376 generates a LVDS for
display device. The audio signal is also inputted MT5376. After processing, MT5376 transmits the
signal to audio amplifier. Then, the amplified signal is the output audio signal.
The route of TV input
TV signal is demodulated by the tuner then the demodulating signal is divided into two parts, video
and audio signal. The video signal is processed by MT5376 then MT5376 generates a LVDS for
display device. The audio signal is transmitted in the route named SIF. The SIF signal is
demodulated and decoded by MT5376. The audio signal is inputted MT5376. MT5376 transmits
the signal to audio amplifier. Then, the amplified signal is the output audio signal.
The route of DTV input
DTV signal demodulated by the tuner then the demodulating signal is divided into two parts, video
and audio signal. The video signal is demodulated by MT5376. The demodulated signal is
transmitted to and processed by MT5376. Also, MT5376 generates a LVDS for display device.
The audio signal is transmitted in the route named FAT-IN. The FAT-IN signal is demodulated and
decoded by MT5376. After processing, MT5376 transmits the signal to audio amplifier. Then, the
amplified signal is the output audio signal.