KV27v15 was playing fine when a bow on right side of picture appeared intermitantly, then would pop back to normal. After 15 or so events accured, it died completly. No picture no sound, No standby light and no click. Completly DOA. Power supply??? H.O.T ??? Any sugestions would be appreciated. ... Tom
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Re: Sony KV27v15 DOA
The high voltage circuit also runs the horizontal deflection circuit
and much of the rest as well. The horizontal problems you describe were
a prelude to high voltage failure. If the TV is anywhere near 10
years old (how come you guys never give the age????) it isn't
worth the cost of overhauling the high voltage circuit. You might
be able to replace just the H.O.T. but the flyback is the source of the
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the problem there is a loose connection on the board,you said that you smacked the right side of the tv and it goes normal.there are parts that should be resolder on the board in order to back into normal operation.
Sounds as though there is an intermitant, heat-related problem with the HV transformer. You can order this at a tv parts shop or from Sony (probably more expensive) the part number should be on the part or on a schematic. If not, the parts dealer can look it up from the model number.
I would suggest to unplug the tv from the wall for about 15 minutes and then plug it back in,and turn it on,this should reset the microprocessor and realign the colors back to normal.let Us know how it goes and if you need more help.
Symptoms are not related,what you hear is the high voltage turning on and that is normal if it only does it for less than a second,the grainy picture might be intermitant,dont turn it off,when the picture is grainy tap the side of the set to see if it racts and if it does you know you have a loose conection.This could be outside because of a loose ground on tha cable or inside in the tuner.
Your problem sounds like the stk type regulator.. Itsnot a really expensive part BUT on a set this old yes you can repair it but also your gonna be repairing it more and more as the capacitors are drying up and the circuit is getting brittle. I wouldnt invest anything in this set. time to make a boat anchor out of it!