It was suggested by a friend who had a similar incident that my high voltage transformer was probably the issue with this old set because it had no picture just a snowy one. Have any tech here had any experiences with these sets? If it might be the high voltage transformer how does one find a replacement part? I know the set is old, but if I can repair it for a little money I figured, why not?
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Re: Old Sony KPR-53EX35
If you have snowy picture on this TV set, the problem is not your high voltage transformer,
The defective part is more likely the tuner or the IF section of the TV.
I would suggest to use a video source from a DVD player ot VCR and connect the audio & video output to the audio & video input on the TV. Do not forget to select video 1 or 2 on the TV.
Hope this helps.
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If it sounds normal, but does not heat, you probably have a defective component in the high voltage circuit. If it's older than 7 years, or has been used to heat a lot of low water content food (popcorn or similar), then magnetron failure is a strong possibility. If it's not humming nearly as loud as before, though, you could have a bad relay, and the high voltage transformer may not be receiving power to its primary winding.
That is not a good sign, the problem is in the high voltage, especially if it was a funny smell it would indicate the high voltage transformer "flyback transformer" is toast along with other parts. The set is 4 years old, and new tv's are designed to break down anywhere from 3 to 5 years, probably more cost effective to buy new.
What's burning is probably your high voltage transformer. When your glass plates get a crack in them, they will spark. You probably have a burned out high voltage transformer. That's what produces the ozone. Helpful hint...........the high voltage transformer is also the one used in bug zappers
Problem is in the secondary power supply which provides power to high-voltage and scanning sections of main board. This is called BOARD D, and has the high-voltage section, flyback transformer, and control IC on it.
Can't be fixed by user, needs service tech and new part, around $300
I’m sorry to tell you this but; I wouldn't recommend using a different transformer, even if it's the same size, it could cause serious damage. The HV transformer should only be replaced with the exact replacement part.
This looks like a problem with the Hv Voltage section of the TV set. What you need to do is to measure the voltage from the HV transformer to the Anodes of the CRTs with a high voltage probe, or have this done by a qualified TV technician.
Or check the voltage test points on the HV / Horizontal board. This will determine if the section is working or not (most likely not). Make sure you have a schematic, and multimeter and a high voltage probe.
I would suggest that if you do not have a background in electronics that you have a qualified electronics technician who knows TV take a look at your set and perform these test.
My thoughts would be, was it a Sony OEM transformer or a generic type? If the latter, that is probably a likely suspect. Another thing would be misplaced wires or switches that could have been accidently moved while replacing the transformer. I have had some of these sets that had no high voltage, and all it turned out to be was a broken solder connection on one of the pins going to the flyback transformer. Usually, if the flyback is bad, the Horizontal output transistor would be also defective. It's also possible that in the process of removing the old flyback (fun job wasn't it?) you may have cracked one or more of the circuit traces in that area of the PC board.