Question about Sony FD Trinitron WEGA KV-20FS120 20" TV

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Sony KV-20FS120 Model KV-20FS120 no sound at all, occasional a crackling noise but nothing else.

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  • irma32307 Jul 24, 2008

    Got audio through stereo. Thank you meknow

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  • 71 Answers

Do you get sound when you play a dvd thru audio/video inputs?
If this unit has audio output at the back run audio to amp and see if you have audio thru your stereo

Posted on Jul 24, 2008

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6ya6ya

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Hi there,
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Posted on Jan 02, 2017

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Crackling when turned on then high pitched howl and sound like vinyl being played loud and having stylus dragged across it is the only way to describe the noise after howl. was being used and did crackle...


You didn't say whether it was one or both channels. The word to describe the noise when using a turntable, back in the days, is called Acoustic Vibration. Your issue is not that. I can be an amplifier oscillating, for the high pitched sound and the crackling could be DC Offset*meaning a damaged amplifier) If you need further assistance, or would like to inquire about a repair, please visit my website at audioserviceclinic.com. Thank you.

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This is the SMPS Power suply drive and the IC fails ONLY if there is fault in the circuit. You need to check on the SMPS section
check this link below for tips:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Next you need to check if the LINE output transformer has failed. If so this will have a higher current drain and so switch off the SMPS unit. check for the EHT drivers, capacitors in the HT circuit.

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Hi, one of the IC's is bad, please take it to a qualified service personnel to change it for you with the right model.

thanks

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Oct 19, 2008 | Sony FD Trinitron WEGA KV-20FS120 20" TV

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You need to replace its Picture Tube (CRT). Its CRT's defect.

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Dont plug it on your tv the FLYBACK of your tv was defective. Need to replace your flyback or else more parts inside was damage. Bring your tv to a Electronic tech.

Jan 01, 2008 | Sony FD Trinitron WEGA KV-20FS120 20" TV

1 Answer

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Undoutably the SMPSU (Switched Mode Power Supply) is faulty.. This will be a shop job... ensure you get a firm "Quote" and explanation B4 allowing it to be fixed.

Jul 26, 2007 | Sony FD Trinitron WEGA KV-20FS120 20" TV

1 Answer

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It's normal for new sets, especially Sonys to do that due to some sort of gas build-up in the new tube. My set still gets a high-pitched buzz after power on and lasts for a minute or two before silencing. If the hissing continues when the TV is turned off return it to the shop ASAP. It could be a problem with the power supply, something getting ready to blow up. Good luck

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