Question about Olevia LT37HVS 37 in. LCD HDTV

3 Answers

Flickerin Screen I have had the for 18 months. Yesterday, I turned on my tv and found that it is flickering like a strobe light and wont stop. I called Olevia and there werre about as helpful as a bag of S#@T. $200 to send and return the TV and $100 per hour to look at it. Any Ideas of the problem or a tech in the Fort Lauderdale area??? My 237v would flicker all the time, I replaced both inverter boards and now when it turns on it doesn't start to flicker for a few seconds. It flickers on and off til it will only stay flickering after about a minute. I have resoldered many joints on the power supply with no change in operation. Power supply output to the inverters when the TV is not flickering it is about 19.7vdc, once the TV starts to flicker the voltage jumps to 22vdc. I don't know if the problem is the power supply is there a way to verify exactly where the problem lies. Any information people can give would be appreciated. Thanks

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  • aaronpfeifer Oct 02, 2008

    Has anybody had this same problem? Is it possible there are bad solder joints connecting the light tubes themselves? I haven't had it that far apart yet to investigate that possiblity. Is there a way to rule out the power supply possibly being bad without me going out to buy a new power supply? Any information would be helpful.

    Aaron

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3 Answers

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  • Master
  • 6,966 Answers

Hi,

To my understanding, almost all power supply (SMPS) for use of such devices would be self-regulated. There is no way for the voltage to go up, perhaps down (a little) but never up. Based on this, it would be safe to assume that it is indeed the power supply. If the supply voltage becomes unregulated (and shoots up), the normal tendency of the electronics it supplies to would be to clamp down and auto protect/shutdown. Some are more sensitive than others and in all probability, the inverters are just doing that.

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 Oct 02, 2008

  • Louie  Role
    Louie Role Oct 02, 2008

    Have you tried getting hold of a service manual or at least a schematic diagram with voltage readings? You could start looking at Syntax Olevia

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  • Master
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Hi

you have problem in power section! try to find out the leak filter capacitors! and also check the bias control of regulator maybe this is loosed carbon gap.

Thanks!

Posted on Sep 23, 2008

  • carlos fernandez Jr.
    carlos fernandez Jr. Oct 02, 2008

    Hi



    The SMPS or Switch mode power supply, if the regulator control adjust is bad you can get High voltages... and not low voltage.. if you got low voltage you have another problem in Hot section!

    But the main complaint is u got abnormal voltages! 19.7v sometimes jump to 22v. all you have to do is check the Bias Control in power oscillation section.



    Thanks!

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  • Master
  • 1,268 Answers

The problem is within the power supply. It sounds like a diode problem on the power supply board. Try double check any other burned components like bulged capacitor and burnt resistors. Replacing them could fix it.

Posted on Sep 23, 2008

2 Suggested Answers

JRE_NJ
  • 1 Answer

SOURCE: Flickerin Screen

Just solved this problem for a customer.
Problem found to be a cold solder joint output transistors to inverters.
Remove then resolder cold solder joints. then your good to go. JR,

Posted on Sep 19, 2008

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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