Mitsubishi 30" LCD tv Buzzing power supply

[andy smethurst]

Hello, I have this good working Mitsubishi DV300 lcd tv,except the power supply emmits an anoying humming buzz.It dose not effect the picture,and have located it as the transformer on the main power supply,that feeds the inverter board.It only takes a minuite from start up to become audiable and increases in volume till it peaks. This thing is 6 years old and would like to fix the problem, but what is it? I can't find much on this device on the net,no schematic or guide.I am greatfull for any advice and the location of any information on this "Mitsubishi Diamond Digital DV300" 30" lcd multifunction display. Thanks again.

Regards:Andy

[PlainBill]

Re: Mitsubishi 30" LCD tv Buzzing power supply

Hello, I have this good working Mitsubishi DV300 lcd tv,except the power supply emmits an anoying humming buzz.It dose not effect the picture,and have located it as the transformer on the main power supply,that feeds the inverter board.It only takes a minuite from start up to become audiable and increases in volume till it peaks. This thing is 6 years old and would like to fix the problem, but what is it? I can't find much on this device on the net,no schematic or guide.I am greatfull for any advice and the location of any information on this "Mitsubishi Diamond Digital DV300" 30" lcd multifunction display. Thanks again.

Regards:Andy

It's difficult to say. My crystal ball is in the shop for it's annual recalibration and update. Since you didn't bother to include any pictures that means any suggestion is pretty much a shot in the dark.

It sounds like it might be loose windings on the transformer, or whatever it is. You could try soaking the component (transformer?) in varnish.

PlainBill