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JVC 32" LCD TV SMPS high pitch buzzing noise

The TV works fine, it switches ON fine and everything works fine, just whenever its switches ON it gives high pitch buzzing noise, this is random and does not always happen but it does most of the time. The SMPS is Vestel 17PW15-9. I have the schematic as well for this SMPS. I have another SMPS 17PW15-8 which is fine and quite similar to 17PW15-9 with just a little bit of difference. So I took most of the parts, including transformers, exchanged it into 17pw15-9 but it still is making that noise. This noise comes even if no other connections are done on the SMPS. I tried changing (exchaning) following parts, few capacitors, 1 optocoupler, 2 transformers. What else can I do?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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bigg t
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SOURCE: Dishwasher Making Loud High Pitched Noise.

How deep do you want to get into this?It sounds like the wash pump motor bearings that are worn.You can pull the unit out flip it over and wd40 the bearings in the motor or you can replace the bearings.Try to lube them first.

Posted on Feb 24, 2008

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aborcass
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SOURCE: Dishwasher Making Loud High Pitched Noise.

debris caught iside pump assy is what it sounds like

Posted on Feb 24, 2008

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SOURCE: TV making high pitch noise, stop working.

It must be the horizontal output transistor, it maybe short circuited. A short in flyback.





Posted on Apr 03, 2009

  • 192 Answers

SOURCE: High pitch noise coming from the tv.

I suspect you have a bad set of capacitors in the control module. This problem usually starts out as a high pitched noise but can lead to the TV not turning on. Please see the link below, posted by StivO. It gives step by step instructions on how to replace the capacitors. This is a very inexpensive fix.

http://www.fixya.com/support/r741402-polaroid_flm_373b_lcd_tv_black_screen

Posted on Apr 26, 2009

  • 159 Answers

SOURCE: when my rca 36F530 tv is plugged in it makes a high pitched buzzing noise picture does not come on

There is a short circuit in the high voltage circuit. the transformer who helps to create the high voltage or his power transistor is damage. replacement needed. the repair is not expensive, because the parts are average repair. Ask for an estimate.

Posted on May 02, 2009

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