Question about Sony 32 in. LCD TV

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Fluctuation and Grounding issues

My problem is voltage fluctuations and grounding problems. What Do I do?

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Hi,

Based on your post/description, I would suggest the use of a voltage regulator identical to those used by desktop computer systems. They normally are rated at 500 watts and should be sufficient for your Sony 32 in. LCD which would consuming something like ~130 watts. Additionally, try to get those models that have polarized AC plugs to match your house wiring and that of the Sony. This would also take care of the grounding problems.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Mar 19, 2008

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A pleasant and good day!

The problem could be the power supply.
That problem is usually happen when the output voltage of the power supply got a voltage drop or fluctuation.

This is the procedure on how to fix that problem:
  1. Remove the back cover of your TV.
  2. Plug-in the power cord of your TV and power it ON to perform a voltage data or voltage check.
  3. Test the output voltage of the power supply.Use a multimeter (DC range) then check the 5vdc for the system and logic supply.
  4. If the 5vdc got a voltage drop when you power ON the TV.There's a leak or bulge on top capacitor on your power supply unit,replace it!
Like this:

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Watch this video to guide you on how to replace a capacitor.
I hope this solution will be helpful.Thank you and good luck.

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I have sanyo 26", i


if you have an experience in basic electronics trouble shooting you can fix the problem. all you need is to open your TV unit to trouble shoot damage parts, use digital tester. first smell burn parts i'm sure some parts are damaged due to wrong input voltage. then start checking parts at power supply, blown fuse, shorted rectifier diode and damaged capacitors. after you checked suspected parts disconnect all the connectors at the load side of the power supply then try to turn on using 110 v supply, check the output voltage if their is an abnormality. follow the label voltage if constant no fluctuation which can damage the main board.

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1 Answer

Sony kv32v15 is dead with no sounds are lights. How difficult is it to replace the power supply / power management components?


since the problem is dead set all you need is open the back cover to trouble shoot, use digital tester. check blown fuse and then power on the unit check the output voltage at power supply panel board which supply the main CRT chassis board. if no output voltage check open fusible resistor its about .1 ohm, then check shorted rectifier diode and transistor sometimes cause by voltage fluctuation. just consider also the horizontal out put transistor it might be shorted cause by over current coming from power supply.

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1 Answer

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Had the same problem sometime back with same model of LCD TV, it has something to do with voltage fluctuation and has no easy fix that you can apply, have it checked out at a local repair shop...

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Remove the mother board...similar to your home pc,
Locate the capacitors that had gone bad
take it to a television repair shop and had them replace those Capacitors (with a slight voltage increase).
IT will Start Working fine.


It happened because of Voltage fluctuation so beeter connect a Voltage Controlling device to your Polaroid LCD.

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I have 3 words for you service, service...oh yea and service. The problem that you are having is some sort of power fluctuation that I have only saw within Sharp units. Give them a call and let them send out a Technician to take care of the issue. Hope you are still in warranty!

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for tomchik, check your input voltage for voltage drop or fluctuation, if any employ voltage stabilizer, then change your power module. make sure that there is enough ventilation around your tv.
for bananahead , go and change your backlight inverter

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