| 摘要 |
PURPOSE: A satellite broadcasting receiver main board system and a satellite broadcasting receiver including a negative ion generator are provided to easily replace a mother board with a new one and improve sound quality and picture quality of digital broadcasting. CONSTITUTION: A satellite broadcasting receiver main board system includes tuner(13), a mother board(20), a video and audio signal separation switch(14), a power supply(16) and a CPU(17). The tuner selects one carrier from a satellite signal received through an antenna and a frequency converter and demodulate the carrier. The mother board separates compressed video and audio signals from each other. The video and audio signal separation switch displays the video signal on a TV screen and transmits the audio signal to an audio system and TV. The CPU is connected to the power supply, the mother board and a sensor to control the components.
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