Digital Piano Stopped Digitizing ...

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Discussion in 'The Projects Forum' started by hairy turtle, Feb 19, 2013.

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  1. Feb 19, 2013 #1
    hairy turtle

    Thread Starter New Member

    Feb 19, 2013
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    My 20 year old Technics/Panasonic digital piano decided to take a break and although the little red light (on the front) lights up, all other functions have ceased.

    Before removing the individual boards, I did a quick visual inspection and there are no obvious visual signs of a problem. The tops of the capacitors looked normal. I ran a voltage check and power enters the backside of the unit at 115v then travels to the transformer??? and exits at 19.6v where it enters the light colored board which I assume is the amplifier board.

    I'm not too e-savvy beyond this and will ultimately need to take the boards to a wizard. What I am is very careful and know the fundamentals of the e-world (I assemble all my own computers and have managed to do some basic re-soldering of tv circuit boards, etc).

    Beyond that, I just wanted to get some expert advice on what to try next and was wondering if that 19.6v sounds correct. If that sounds about right ... what next. Thank you all in advance!

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  2. Feb 19, 2013 #2
    MrChips

    Moderator

    Oct 2, 2009
    16,866
    5,178
    First things first.
    Give us the Model Number.
    Search for the schematic or Service Manual.

    There are a lot of brown froth on the AC input board and under the power supply capacitors.
    You need to look more closely at that.
     
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  3. Feb 19, 2013 #3
    hairy turtle

    Thread Starter New Member

    Feb 19, 2013
    2
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    Yeah, noticed that too and most of the capacitors did seem to be oozing but I thought it was just some form of glue ... feel like such an e-noob.
     
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  4. Feb 19, 2013 #4
    MrChips

    Moderator

    Oct 2, 2009
    16,866
    5,178
    Sometimes it is glue, sometimes it isn't. You have to know when it isn't glue.
     
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