Question about Broksonic CTGV-5463TCT TV

2 Answers

TV cuts off

My Broksonic TV cuts off every 75 seconds. It is 3 months old and the
picture tube is strong with good color.
I am on satalite but even with that off it still cuts off.

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  • captasdf Jul 22, 2008

    I will give this a try tomorrow after I buy a can of compressed air. I will let you know.
    Thanks

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2 Answers

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  • Master
  • 4,889 Answers

I would look at either the on/off button faulty or a heat sink not doing it's job.

Either way, the solution is quite simple. The on/off button simply toggles a low voltage circuit that powers your tv. If it is dusty, it may complete the electrical circuit and send a false signal.
A heat sink may be dusty and unable to dissipate heat. Overtemp protection may be switching the TV off.

I would take a can of compressed air, open the back and clean the dust off the circuit boards.

Posted on Jul 22, 2008

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  • Master
  • 6,966 Answers

Hi,

Offhand, initial suspects could be:

  1. power supply;
  2. cold solder or loose connection (heat related);
  3. internal protection circuitry kicking in.
A couple of question pls:
  1. any burning smell or crackling sound;
  2. was there any power surge or interruption prior to the problem;
  3. anything out of the ordinary;
  4. during the the 75 seconds that it is on, picture and sound normal?
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 Jul 22, 2008

  • Louie  Role
    Louie Role Jul 22, 2008

    Hi again,


    This is a repost of my response to your "Ask Me" posting here.



    Repairs of course would require familiarity with electronic circuitry
    and components, use of a DM and a soldering iron and access to to a
    service manual or at the very least a schematic diagram with voltage
    measurement.



    Assuming the above and you are considering a DIY (do-it-yourself),
    perhaps the easiest and fastest would be to do a shotgun approach, i.e.
    open the unit and re-solder most of the solder joints with particular
    attention to the power components such as resistors, transistor, ICs,
    transformer (including the FBT). Of course one can never be sure which
    really is defective but the objective is to repair with no in depth
    diagnosis. Another component type to check would be the big capacitors
    right after the diode(s). Look for any visual indication of
    bulging/blistered, leaky or anything out of the ordinary among the
    power capacitors (and even the other components), if found/yes, then
    replacement(s) would be needed.



    Other than the above, further diagnosis requires that you operate the
    unit with the back cover off and determine if it is heat related. This
    could be done by powering the unit, wait the 75 seconds, quickly unplug
    and feel for any component that heated up. There might be a different
    smell to it also. Of course safety precautions when working with live
    sets and/or units just unplugged must be observed.





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