Fushida FR960 Satellite Receiver Repairing Circuit

Published:2011/8/5 20:07:00 Author:Robert | Keyword: Fushida, Satellite, Receiver, Repairing | From:SeekIC

Firstly visually checking the power board, it finds the fuse is burned to be black. The IC2 4N35 (over-voltage protector), IC3 4N35 (voltage regulator control), Q1 C2060, Q5, C1815 (here it is different from the Wanlida device, Q5 is connected between the IC2 and SCR QBT1690 for over-voltage conversion) are all rupturing. Checking in the circuit it is found that the AV input anti-jamming inductive choke L1, 220V rectifier D1, D2, current limiting resistor R7, C4, switching tube Q3 BU508A, R8, R13, D14 3.6V voltage regulator, C9, Q6 SCR BT1690 are damaged. In the back of the power board there are many copper wires are burned to be black and dropping. The printed board are beyond recognition. In the bottom of the power shield iron box it also has the signs of electric shock.



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