Video control and display data: Video signal is
received from TUNER, AV port(AV1,AV2,S-Video,Component) and goes to the
one-chip video decoder (VCTI) which separate the R,G,B signal and passes on the
signal to AD converter(AD9883) which converts 4:4:4 video format into digital
and gives output to the Picture Enhancer(FLI2300).This picture enhancer improves
the quality of the picture by changing the level of RGB signals. The output of
this enhancer chip is fed to the deinterlacer ,which in turn goes to the Scalar
(GM5221).The scalar gives the output on the LVDS cable which is connected to
LCD module. VCTi acts a micom and is
responsible for video processing and audio signal processing. It accepts the RF
signal and separates sound and picture from it.
Scaler is responsible for regulating the timing of signal to LCD panel
and size and location of the signal. Graphic control accepts the PC(Analog RGB)
and DVI-D (Digital ) signal, Scalar is responsible for regulating the timing of
signal to LCD panel and size and location of the signal. Graphic control
accepts the PC(Analog RGB) and DVI-D (Digital ) signal,the signal of PC input
is connected to analog port in Scaler and the signal of DVI-D input is connected
to digital port. Thus it receives two input and switch between them to give
output at the LVDS which in turn gives output at the LCD module.
Schematic
Power unit:
The power board supplies a DC voltage of 33V, 24V, 12V to the main board.out of
this 33v is used by the tuner and 24v is used directly by the inverter and the
sound amplifier IC. 24v also is converted into 5v by a regulator. The 5v is changed into 3.3v and 1.8v by a
regulator, both voltages(3.3v, 1.8v ) is used by VCTI, Scaler, FLI2300 and
AD9883. The voltage of LCD Panel is 12v.
