Gaosineibeier GSR-2001E Digital Satellite Receiver Switch Power Principle And Repairing Circuit

Published:2011/8/6 19:49:00 Author:Robert | Keyword: Gaosineibeier, Digital, Satellite, Receiver, Switch, Power, Principle, Repairing | From:SeekIC

1.Switch power working principle.(1)The power input part.The L5, L6 and C23, C1 are make up the dual common-mode low-pass filter network. Its function is to inhibit the EMI from the power network. Also it could inhibit the EMI from the switch power itself to ensure the power network is not polluted. This combination has a good inhibiting function for many kinds of high-frequency interfering signal. The D1~D4 and C2 are make up the bridge rectifier filter circuit. The TH1 in the picture is a thermistor element with negative temperature coefficient. Its feature is that its resistance value would be large when the temperature is low, and its resistance value is low when the temperature is high.



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