Does this look reperable to anyone?

Discussion in 'General Electronics Chat' started by steinless, Aug 7, 2013.

  1. steinless

    Thread Starter New Member

    Aug 7, 2013
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  2. mattbullet

    Member

    Nov 29, 2008
    20
    12
    If the board still works then you just need a new gecko.
     
    ErnieM, #12 and joeyd999 like this.
  3. sheldons

    Active Member

    Oct 26, 2011
    616
    101
    unless you know exactly what you are doing and have the correct test equipment do this-
    1 open nearest dustbin
    2 place board in bin
    3 close lid
    4 buy replacement board
    if set doesnt work after new power supply has been fitted ,take set outside-smash it up and buy a replacement
     
  4. LDC3

    Active Member

    Apr 27, 2013
    920
    160
  5. joeyd999

    AAC Fanatic!

    Jun 6, 2011
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    Did you know you can save $500 in just 15 minutes?
     
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  6. radiohead

    Active Member

    May 28, 2009
    474
    31
    Just because the filter capacitor discharged doesn't mean its faulty. A cap that size would definately make short work of a gecko. Obvioulsy you checked the fuse, right? I would then check that black boxy component next to the fuse. It looks like a delay module that could be bad. Before turning on the juice, get an old toothbrush and some acetone, flux remover or alcohol and clean up those messy solder joints (near the bottom of the image of the solder side).
     
  7. JoeJester

    AAC Fanatic!

    Apr 26, 2005
    3,373
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    In addition to the above, and it might be the picture, but I counted a little over a dozen suspect solder joints and one additional possible run repair.

    Gecko's and other critters who don't abide by the signal words are typical. 15.5kV makes geckos disappear ... poof.
     
  8. Pencil

    Active Member

    Dec 8, 2009
    271
    38

    Unless you know otherwise, those three caps
    may be low quality caps (Teapo?) and looked
    like that before the incident.
     
  9. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    You should aslo check the high voltage capacitor beside the transfomer on top position.
     
  10. steinless

    Thread Starter New Member

    Aug 7, 2013
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    hi all,

    thanks for all your input.:)

    more info actually. doubt the fuse is blown. the supply still works. i get power only on the leds when i put the thing onto the tv.

    theres a chirping sound when i turn the thing on. sound is still on but no display.

    replaced the three caps, but still chirping sound with led on light. read somewhere perhaps might be the diodes? secondary diodes? i guess the two below the inductor?

    as for the tracks, the connectivity is apparently still there. tested with a multimeter... but not sure if the big black cap still functions normallly.

    so my next step i guess is changing the diodes...
     
  11. steinless

    Thread Starter New Member

    Aug 7, 2013
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    you mean the green one? i think i will change that soon. thanks!
     
  12. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    Is that look like green, but it seems look like dark red.

    Does the chirping sound came from the transfomer?

    If so, then the problem coude be happened at the tranformer and the caps around the tranformer.
     
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