1. AV INPUT SELECTION CIRCUIT
(1) This section is composed of Video Switching IC(CXA2040) and peripheral devices.
Video switching IC selects CVBS Video and S-Video and signal is sent to the scaler IC
(2) CVBS output signal also is sent by CXA2040 after amplifying 6dB for input signal.
2. COMPONENT INPUT
Component input signal is connected from input jack to scaler directly.
3. RGB INPUT OUTPUT CIRCUIT
(1) This section is composed of RGB Input Output Jack, Schmitt trigger inverter IC, OP-AMPs, and peripheral devices.
(2) RGB input signal path is connected from input jack to scaler directly.
(3) RGB output signal is made by OP-Amps ICs. And this sends output signal to RGB output jack.
4. HDMI/DVI INPUT CIRCUIT
TMDS input signal is connected form input jack to scaler directly.
5. RS-232C INPUT OUTPUT CIRCUIT
This section is composed of RS-232C IC(MAX3232), and peripheral devices.
Computer / Controller and scaler(Micom) is connected by RS-232C IC to match signal level.
6. VIDEO SIGNAL PROCESSOR
(1) This section is composed of LGE6991DD and peripheral devices.
(2) This IC includes Micom block and Memory interface.
(3) This IC includes A/D Converter, PLL Circuit, Video decoder and De-interlacer.
(4) This IC includes TMDS Receiver and LVDS Transmitter.
(5) This IC also includes Sound Processor.
7. AUDIO AMPLIFIER
(1) This section is composed of NPT3000A and peripheral devices.
(2) Audio amplifier’s function is amplification of sound signal received from sound processor.
8. LAN Conrtrol Block
(1) IC129 PIC18F66J60 compose LAN control circuit by processing the input from JK113 RJ-45 with X102 25MHz.
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