Question about Sony FD Trinitron WEGA KV-32FS120 32" TV

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Sony TV KV32FS16. TV turn on problem.

Sony TV KV32FS16. TV started to take more than one button press to start. This got and worse till I was pressing the start button more than 20 times to get it to turn on. This kept increasing until it would not turn on at all. Self diagnosing feature LED was flashing 4 times. Manual says this indicates I-prot, lack of vertical pulse or IC 502 failure. What the heck is I-Prot?
The progressive nature of the failure indicated a leaky capacitor to me. Any thoughts?

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  • jimca39 May 05, 2010

    What does I-Prot mean.
    Which capacitors are the most likely to fail in the power supply.
    My TV is KV-32FS16
    +13V and -13V are not present at IC 502

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  • Sony Master
  • 11,800 Answers

All will fail in time, the secondary filtration ones first. The fact that +/- 13 volts is missing is the indication to start with it first. After that check all voltages and finally the power transistor itself. If in doubt change all capacitors before doing anything else, they are cheap enough to start with that.

Posted on May 05, 2010

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  • Master
  • 2,335 Answers

Hello.

As I understand it, this is an "i-prot" code which implicates voltage suplpy to the A-board. The probable cause locations listed are as follows:

1. +13V is not supplied (A board)
2. IC561 is faulty (A board)

If you are eager to chase down the voltage supply problem yourself, may I recommend this Agoraquest thread as a good place to start, where your model and your symptoms are discussed?

I hope that helps.



Posted on May 05, 2010

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