Question about Philips Magnavox MWR20V6 DVD Recorder/VCR

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Magnavox MWC24T5A When the power is turned on, The relay in This unit would click and something near the HV would make a rapid clicking sound, and then immediately power off. With the case open, I tried to isolate where the clicking sound was coming from. After turning the unit on about 50 times, the 4.7 capacitor blew smoke into the air. What would be clicking and cause the cap to blow? Thanks

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Turning it on repeatedly probably took the cap in the shutdown circuit. As for the underlying problem I would suspect the HOT 2sc2578 p/n# 4835 130 48252... And/or possibly a diode short to ground. Might test D1643, D1605 (rectifier diode) or D2575.. After that, mybe regulator or Q1601 2sk3563, Q1602 2sc2120 in the smps.
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993
premtech@willapabay.org

Posted on Nov 25, 2008

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