Question about Pioneer SD-P50A5-K 50" Rear Projection Television

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Turns off on its own with a pop sound and is blowing a fuse

Teh tv turns itself off and can be turned right back on. Recently it went off and when the main power is turned back on it goes into standby immediately. I opened it up and found a blown fuse. Not sur of the position but two are right next to each other, this was the right one. Replaced it 125v 4 amp and it worked for 2 days and now does the same thing? Any Ideas on what is going on? Was manufactured in 1999 so i don't know if it is worth calling for repair or if I could do myself would like to.

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  • NHPD118 Sep 17, 2007

    I also found it lights up a red led light on the circuit board when this happens about 4 inches towards the front of the TV in front of where the main power cord plugs into the board. The fuse position is FU106

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Remove original solder from regulator pins, (all four of them)on large heat sink that convergence Ic's are mounted on.Clean contacts with de-natured alcohol and re-solder.By the way,use OEM or better conv. Ic's or you risk re-failure of Ic's.

Posted on Sep 24, 2007

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90% it is convergence board problem. Need to replace STK392-110 IC.

Posted on Sep 16, 2007

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I have a Samsung PN51E530A3FZXA 51" plasma TV. I heard a pop & saw smoke from left rear of TV. TV went black & had no picture or sound, however the red power light stayed on.


Unfortunately plasma tvs are a lot more complex to service, instead of 2 or 3 boards there are a half dozen at least. I would guess when the main PS board went out it took some other boards with it. I don't have a manual for your set but I would look at the power supply sub boards, there generally are 2 of them, or on some models that is parts of the other boards. Generally there is a legend to see what voltages are supposed to be present at what places, samsung is good about making the test points on the boards. Also there are fuses on most the other boards and its possible one of those has blow, it won't be a typical fuse like your used to seeing, some are a small green component and some are white mini fuses...Good luck!

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1. Unplug the unit and do not plug it in.
2. if its under warrenty take it in please!
3. if its not under warrenty and you know eletronics verify what cap popped and replace that and the fuse.
4. if you do not know about eletronics this work would cost you around $150 for the wrok done.

Good luck I hope this information helps you!!

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It is protecting you and itself with high probability.
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The older style of power supply was 'dumb' and unable to do this so could cause fires if the failure wasn't teh 'right' kind to blow the main fuse.

I agree with the manual; this is a job for a tech.

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Your lamp has went bad and you need to replace it. If you look on the left side of your tv there is a sticker that has a lamp part number on it. You can order that from part store.com and you will be back up and running.

Josh

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If your unit was blowing fuses you must have had an overload somewhere. Your post is not clear. Does your unit run ten minutes after unplugging and replugging it? If it does then there is still a partial short in it somewhere which causes it to shut down for protection. It could be anywhere. Some detail on what happened prior to the fuse blowing would be helpful for diagnosis. You do not sound like you would have the expertise to troubleshoot this unit. I doubt there could be much wrong with it and the cost should be minimal. Find a reputable repair shop to handle the repair. Good luck.

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