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HI WE HAVE A ATEC LCD TV MODEL NO. AV370W WHICH HAS A POWER SUPPLY FAULT.. THE RESISTER R108 AND R104 GETS BLOWN EVERY TIME WE REPLACE THEM. THE POWER SUPPLY MODEL IS IPLV-42 PLEASE GIVE US SOLUTION ON THIS MATTER. THANK YOU...

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  • info54668 May 27, 2010

    HI WE HAVE A ATECHI WE HAVE A ATEC LCD TV MODEL NO. AV370W WHICH HAS A POWER SUPPLY FAULT.. THE RESISTER R108 AND R104 GETS BLOWN EVERY TIME WE REPLACE THEM. THE POWER SUPPLY MODEL IS IPLV-42 PLEASE GIVE US SOLUTION ON THIS MATTER. THANK YOU...

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  • Master
  • 19,396 Answers

Hi.

As far as I know there is no service documentation for Atec TV.

I think the one below is your PSU. Detail from this blog.

Check the capacitors indicated with the arrows, ensured they are not bulged or leaky. If any of the capacitors lined with the resistors had blown, then there will be an excessive draw on the resistor, and this will blow the resistors. Eventually replace the caps and test again.
Here the picture in detail.

HI WE HAVE A ATEC - ebb5487.jpg

Posted on May 26, 2010

  • 6 more comments 
  • info54668 May 26, 2010

    WHAT ARE THE VALUES OF R104 AND R108?

    THANKS

  • Ginko
    Ginko May 26, 2010

    Hi.

    If the colors are still visible, try using this chart to find the value of resistors.


  • info54668 May 26, 2010

    HI R U THERE

  • info54668 May 26, 2010

    NO THEY ARE BADLY BURNT

  • Ginko
    Ginko May 26, 2010

    Hi.

    Check if the board is the same as the one here: ATEC37LCD_IPLV42PSU_REV_14.jpg

  • Ginko
    Ginko May 26, 2010

    I tried to find service manual.

    All I found were this threads from users with same problem:

    http://www.tv.quuq.org/forum/index.php?t...

    http://www.tv.quuq.org/forum/index.php?t...

    I also found Atec address:

    Atec is built by ONEI UK, 201 Merlin Park, Ringtail Road, Burscough, Lancashire L40 8JY. Tel: 0844 8000266 Fax: 0844 8000267

    Here the website.


  • info54668 May 27, 2010

    Hi,

    We couldn't find the values of the resistors.

    If a solution can't be found, we may have to go with another engineer. My apologies.

  • Ginko
    Ginko May 27, 2010

    Hi.

    No worries. I am aware that if a resistor is burnt and unreadable there is no practical way to know certainly the value of a resistor. If I was doing the job I would empirically test using a resistor that can fit (eg. try reading multiplier band). The resistors have probably low impedance, and they have been placed there to blow in case of abnormal draw.I do not want to instruct you through the empirical way because there is always chance to blow more components.

    This PSU are factory defective and the schematics had never been made public.

    Please let us know if someone has diagrams for Atec, you will make a favor to the crowd of Atec dissatisfied customers.

    Good luck.

    Ginko.


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  • Master
  • 4,889 Answers

The most likely cause of this problem is a failed voltage regulator. The excess voltage is most likely causing the resistor to blow. Usually most LCD tvs use a 3 pin voltage regulator IC starting with 74xx Ex:7418
I would recommend that you test the voltage accross it and let me know. If you are not sure what the correct voltage for that IC is let me know the IC no and I will help you out.

Sai.

Posted on May 27, 2010

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