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some damaged gadget chargers

Discussion in 'Troubleshooting and Repair' started by jazzdglass, Aug 10, 2013.

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  1. jazzdglass

    jazzdglass

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    Aug 10, 2013
    There is a little 600W gasoline generator I have been using lately, just discovered its responsible for the recent incessant damage of my charges. Mostly all of them got spoilt in same method. A liquid like material precipitates out of the casing. I opened some of them up, and I couldn't trace which component released the fluid or which component at all is faulty... I could have easily thrashed them all, but I felt it might be worth it to embark on repair marathon lol since they are like seven now....
    How do I troubleshoot a spoilt charger? I can only identify some few components, resistors, diodes, transformers, some capacitors... But I don't know how to verify which one is damaged... I only know that diodes conduct in one direction only....
    I have a multimeter and a soldering iron.
    Thank you.
     
  2. duke37

    duke37

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    Jan 9, 2011
    An engine driven generator can give the wrong voltage and wrong frequency.

    The faults may differ depending on what is wrong with the supply.
    There are two sorts of power supplies, one uses a mains transformer and the other a rectifier and a chopper circuit. You should find out the type and get a circuit.

    The most likely source of the juice is the electrolytic capacitors if they have been overvoltaged and boiled. Lok at the top of the capacitors, if they are domed due to internal pressure, that is a sure sign that they are dead. Capacitors can be tested for capacitance, ESR and leakage but it may be easier to change the lot.

    Other components may have failed of course.
     
  3. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
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    Nov 28, 2011
    Good advice from duke37 as usual.

    Obvious next step: post some photos here.
     
  4. jazzdglass

    jazzdglass

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    Aug 10, 2013
    Umm photos of what?
     
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,482
    2,830
    Jan 21, 2010
    Your pets, family, or maybe...

    The insides of the power adapters that no longer work!
     
  6. jazzdglass

    jazzdglass

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    Aug 10, 2013
    Okay here you go
     

    Attached Files:

  7. alfa88

    alfa88

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    Dec 1, 2010
    Bad capacitors. Primarily the ones with domed tops. The electrolyte boiled and puffed up the can. If you're lucky nothing else went bad and replacing the capacitors will do the trick
     
  8. jazzdglass

    jazzdglass

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    Aug 10, 2013
    I replaced the capacitors, but it's nko working.. No voltage reading out of the output.. Although it sparks when I plug it in as if its a working adapter... I replaced with capacitors of same raring
     
  9. alfa88

    alfa88

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    Dec 1, 2010
    Take a good close look at the traces for opens and bad solder joints. Otherwise the power transistor might be blown. Again, if you're lucky there is a standard part number on it. The sparking is sort of a good sign. Indicating the transformer is doing it's thing. It doesn't look overheated. A bad sign would be a big pop and a puff of smoke.
     
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