Question about Philips Magnavox 51MP392H Rear Projection Television

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Picture problems I have a magnavox 51MP392H rear projection telivision that I bought three years ago. It has worked fine until last night. I was watching the set and all of the sudden I have double print in the top right and lower left corners. The double print is in blue. I went into the manual convergence menu and tried to adjust but those corners wont adjust. help

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Re: picture problems

The convergence amps have most likely failed. This is the number one leading cause for the symptom your describing and the most common failure on that unit.
Your Tv take two STK392-120 Sanyo Ics for convergence amps, located at Ic7404 and Ic7405 on the board and mounted to a rather large aluminum heat sink. In addition you will most likely have to replace R3159 and R3160 (6.8 ohm 1w) resistors and test the remaining low ohm resistors for change in value.
A shop would really be earning their money on this particular unit if they charged $400 - $500 for the repair. It is an extremely difficult set to work on and there are a number of little problems that can reach-out and bite when attempting the repair.
Good luck!

Posted on Dec 12, 2007

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