Am trying to repair a TV noted below. Any comments from experienced TV Jocks greatly appreciated.

BRAND: JVC 27"
MODEL: AV-27920
MFG DATE: May 98

Symtoms: The unit turns on, get a short burst of audio, then a relay kicks out and system shuts off. No raster at all.

Note some darkening (discoloration) of the PCB in the main power supply section of the board. "HOT" (Horizontal Output Transformer) is intact, but can see a light dusting of whitish powder around the HOT. (not sure if that is just dust or outgassing of HOT)

Did touch up a few suspect solder joints (cold joints) but this had no affect. My guess, the HOT or power supply to HOT has failed, but I don't have a high voltage probe tester to confirm that assumption

Is this a common issue and what is the recommended fix?

Tks,

Swez

PS This is a single board system. All electronics are mounted on a mother board and the only other circuit board in this unit, is mounted to the Yoke of the CRT.

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Replies (3)

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Buickman94 on 04/20/2003 22:17:45
swez, i dont know a thing about tvs and it doesnt seem like anyone around here does either, but you always seem to have the answers for everyone else, so i felt obligated to see what i could do...found a few tv repair forums that may help...go figure...behold the power of the internet

http://www.network54.com/Hide/Forum/185128
http://www.tv-forums.com/

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Swez on 04/21/2003 17:47:49
Hey thanks for the FYI there Buick... I appreciate that and will have a look see...

Swez

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Swez on 04/26/2003 15:45:57
OK, an up date here... got some tips from a guy off one of the sites and he gave me a few ideas on where to look.

Unfortunately, I do not have the proper tools to check some of the items he noted and the payoff is not worth all the effort... so it's going back as is. Let a Pro deal with it. I am learning my limitations.... hehe

But thanks for the site tip... it did help alot!

Swez

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