Question about Philips Magnavox 51MP392H Rear Projection Television

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I have a Magnavox 51mp392h Rear Projection Television That I got for FREE from a friend at work. It had a convergence problem with it so I relaced The STK392-120 IC chips with theSTK392-150 IC chips like different people say you should. I also replaced all The 12 6.8@WF12 resistors with 12 6.8 OHM-1W metal oxide resistors. And every thing went very smooth. Turned on TV and and used the remote to adjust the convergece and every looked good as new.So then I closed all the blinds in the room so I could go back into the convergace screen to get it perfect and when I got to the red and used the remote and brought it douwn just a hair. The tv screen went blank and no sound, All you can hear is a cherping or cricket sound comming from inside the TV. Went back and checked all connection and still no luck. Is it because I used the STK392-150 Or is it because I used metal oxide resistors instead of metal film resistors. Like I said before the TV was free so I thought I would tinker around with it a little. Any help woud be great ! !

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Two main common failures for these sets is the convergence amps and the flyback transformer (which is rather expensive). Both can make the set "chirp".

Chirping means the power supply is being loaded down by a short in most cases, likely a bad convergance IC

More solutions =>

Posted on Jan 01, 2009


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Posted on Jan 02, 2017


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