Question about Panasonic PT-51HX41 51" Rear Projection Television
I've read some of your other trouble shoots. I'm hoping not to have to trash the whole unit.
shuts off and red light blinks 3 times. I've been looking at this quite a bit online and haved really found anything that exactly identifes this 100 % to me anyways. But the n again I'm a designer not a technician. Thanks in advance guys
The most common problem with this unit under those circumstances is the convergence circuit. My guess is one of the amps has failed due to a failed return resistor in the yoke circuit out in front of the amps.
That unit takes two STK392-110 Sanyo amps at Ic7001 and Ic7002 and group of 2.2 ohm 2w resistors in the return. I'd personally replace the amps with the STK392-150's or even 180's for greater reliability and test or replace all the 2.2 ohm resistors that have changed in value or opened. It's likely by what you're describing you'll find one that's open. I know personally from many repairs on this particular unit R7056 opens a majority of the time when Ic7002 fails.
Another suggestion is buy the replacement parts at a well known supplier - so you don't get any of the chineese knock-offs. Acme out of florida is a good source http://www.acme-sales.net/index.shtml you can get the resistors there as well...
Posted on Mar 27, 2008
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Posted on Jan 02, 2017
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