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Casio keyboard Lk-110 had 18volt input

Discussion in 'Troubleshooting and Repair' started by rambo99, Feb 18, 2013.

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  1. rambo99


    Apr 24, 2011
    The Casio keyboard LK-110 should have 9volt input power from a Power Adapter but my family did not no and put a 18volt power Adapter and Smoke came from the keyboard i check all the parts on the power board which there are not alot of parts and could not fine the fault I try Battery and a 9volt power Adapter and the light will not come On this is the first time I can not fine the fault the power board is straight forward check Diodes,transistor,and the PC900v,resistor this where i need help may be I miss something

    Attached Files:

    Last edited: Feb 19, 2013
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Photos of both sides of the board that smoked with an indication of where you think the smoke came from please.
  3. rambo99


    Apr 24, 2011
    Casio keyboard

    This is not my Keyboard and my family said it happen when they connect a 18v power Adapter and Because there are so many Screws on the bottom cover there are so sign of smoke when the cover was remove the only thing I will try is to replace some Capacitor show 6.3v some only show 16v and 25v i have test them with the ESR tester and had low reading I can not take a Photo as the picture will poor view
    Last edited: Feb 19, 2013
  4. davenn

    davenn Moderator

    Sep 5, 2009
    there could quite well be a long list of faulty parts
    particularly the IC's and maybe some transistors

    without more info it will be pretty much impossible to help further :(

  5. CocaCola


    Apr 7, 2012
    Many more pictures needed, take from multiple angles so that we can better see the ICs, take a straight on shot of the back of the board...

    Take these pictures outside in sunlight if possible to avoid flash hot spots and/or focusing issues due to lack of light... Or if you have a light box you can use that...
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