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PC module: Built-in OPS PC module;
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Power switch (ON/OFF): Main power switch of product;
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Light sensor board: Acquire the value of ambient light and send it to the mainboard;
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Touch frame serial port adapter board: Convert serial port signals to USB signals to provide touch
signals for Android mainboard;
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IR board: Receive remote control signals from the remote control and send them to the
mainboard;
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Key board: Acquire button signals and send them to the mainboard;
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OPS adapter board: OPS port to HDMI port, USB port and power port.
