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Sony KV27TS20 - Wax dumped in & now not doing much.

Hello everyone.

I have a Sony KV27TS20 (P-3A chassis) that someone spilled candles into (not sure if water was also dumped in at all). The wax was on the AC and high voltage side (mostly towards the back of the unit).

For a while it was blowing it's fuses but after some major cleaning it is thankfully not doing that any more. Though now it is only lighting up the Sleep LED for about a second or two with a very quick flash of the Timer LED when the power button is pressed. I also don't hear any clicks for the relay.

I don't have the service manual yet but would like input to see if its worth trying to recover and what might be the first things to look at in there. There is no scorching on the board at all and all parts look to be intact.

thanks!!!

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6 Suggested Answers

6ya6ya
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techman
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SOURCE: RCA Model F36450 Chassis ATC113CA1 won't power up

No sir it probably isent a power supply problem as in these sets it wouldnt act like that. First thingm to check since you say your a service tech, is in the horizontal output check and see if the horiz. output transistors shorted. If its not then check a small coil off the base of the horizontal output transistor. its really the base drive coil so take it out and scrap off the ends BOTH ENDS and reinsert and also resolder the horizontal driver transformer. This may or may not fix your problem But if it dosent order if you think ther sets wrth it the flyback transformer as this is a big problem in these sets if the for mentioned things did do the trick. follow the kit instructions that come with the flyback transformer!! Dont take any short cuts. Make sure you do take out the horizontal output transitor or at least unsolder all the leads when tesating it for a short. Good luck

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SOURCE: power problem rca 32v434t

RCA 32V434T likely has a bad flyback--#271996. RCA 32F531T flyback no longer available,#262343 Fix one,dispose of other.

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pishta68
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SOURCE: My Sony KV-34HS510 Tv will not turn on

Sounds like a power supply problem. The TV is failing its POST (power on self test) and tripping a relay to protect itself. Time for a service call :-(

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SOURCE: TV won't turn on, delay/timer light flashing

Please update this with the blink count. That will indicate the circuit in which a problem was found. Once I have that information I should be able to give you the probable cause and remedy.

Dan

Posted on Dec 02, 2008

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SOURCE: sony tv wont turn on, standby light just flashes

check for an open resistor on the power supply, it is actually a fusible resistor, (white) if open, then check the converter, some sets have two separate and some have it as one. it will be on a heat sink on the power supply. if shorted then check for a shorted horizontal output transistor and repair cold solder joints on the horizintal drive transformer which is the real cause of this problem

Posted on Jan 08, 2009

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