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Sony Triniton Fuse Blows

Hi I have a Sont trinitron KV G21S2,15inches.

Recently a fuse blew as I tried to turn the tv by pressing the main power button on the tv. As i pressed the main button I saw a small flash like explosion in the back.

I know how to read a circuit diagram and its components very well. I had a quick look but of a preliminary inspection found no capacitors blown.

The power supply seems to be pulling three amps and blowing the fuse, each and every time I put the tv on once I hve replace the fuse. Obviously there must be a short somewhere. There are four transormers on the board and i put my multi meter along the terminals and they are showing zero resistance. Do I have to pull the transformers out to get an accurate reading ?

I even tried just finding the same board to replace the whole board. But sony doesnt have any parts for this television anymore.

Im in a bit of a pickle. Please help.

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  • Master
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You will have to trouble shoot the board down to the component level I'm afraid. I would for sure pull out the transistors or the FETs to get a good reading on the parts.

Posted on Feb 11, 2008

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techman
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SOURCE: sony trinitron KV G21S2(i think)

Id you have no TV repair experience, play it safe and take the set into an authorized Sony repair place to estimate the cost to repair. Yes I know it would be nice to repair, but how much do you know about component level printed circuit board repair? You will need to first get a service manual, know how to read a circuit diagram, thats a schematic, and know how every circuit works with each other to make the TV set operate. I do appriciate the fact you would like to repair this yourself, but there is no magic fix in most cases when it comes to electronics. There is circuit diagnosise involved. Best advice would be to call in a pro to assist you in these types of repairs. Good Luck

Posted on Jun 23, 2007

6ya6ya
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Posted on Jan 02, 2017

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