Theory Of Circuit Operation - Sharp LC-65LE645U Service Manual

Chapter 7
The route of HDMI CON input
The passing signal is processed with the RTD2986IK. Then RTD2986IK generates a LVDS for
display device.
The route of HDTV (Ethernet) & Component input
HDTV (Ethernet) & Component signal is inputted to the RTD2986IK. After processing, RTD2986IK
generates a LVDS for display device. The audio signal is inputted RTD2986IK. After processing,
RTD2986IK transmits the signal to audio output. an audio amplifier and line out.
The route of CVBS input
The CVBS signal is inputted to the RTD2986IK.After processing, RTD2986IK generates a LVDS
for display device. The audio signal is also inputted RTD2986IK. After processing, RTD2986IK
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 RTD2986IK then RTD2986IK generates a
LVDS for display device. The audio signal is transmitted in the route named SIF. The SIF signal is
demodulated and decoded by RTD2986IK. The audio signal is inputted RTD2986IK. RTD2986IK
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 RTD2986IK. The demodulated signal is
transmitted to and processed by RTD2986IK. Also, RTD2986IK 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 RTD2986IK after processing RTD2986IK transmits the signal to audio amplifier. Then,
the amplified signal is the output audio signal.
The operation of keypad
There are keypad to control and to select the function of LC-65LE645U. Also, there is a LED to
indicate the status of operation ( White => ON).
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Theory of Circuit Operation

Page 7-1
File No. SG-0000313