Will ModyPoly fix my weird Poly 61 issue?

frontpage Forums Product questions and support ModyPoly Will ModyPoly fix my weird Poly 61 issue?

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  • #9246
    Anonymous

    Hi,

    I recently brought a Poly 61 from to

    The only problem still remaining is that a few specific notes are out of tune. So you’re playing and everything is great, and you hit the specific note and BAM, could be 3+ semi tones off. If you shift the octave range the note goes with it, so it’s not tied to a specific physical key.

    I’m still trying to figure this out, but I’m starting to think it’s in the CPU … which makes me wonder if ModyPoly CPU replacement would fix this.

    Anyone have any thoughts on this? Either on the ModyPoly side of things, or maybe where on the board the problem could remain if it’s not tied to the CPU.

    *I’ve changed the battery and believe I have repaired all the damage the leak caused (including a few dozen wiring harness sockets)

    Thanks!

    #9247
    tubbutec
    Keymaster

    Hi,

    this sounds like there is still some battery damage. Specifically I believe that

    1) Some of the traces between the second CPU (not the ModyPoly) and the DCO ICs are broken

    or

    2) Sometimes the internal connectors are doggy, try wiggling them and see if it improves

    #9248
    Anonymous

    tubbutec wrote:
    Hi,

    this sounds like there is still some battery damage. Specifically I believe that

    1) Some of the traces between the second CPU (not the ModyPoly) and the DCO ICs are broken

    or

    2) Sometimes the internal connectors are doggy, try wiggling them and see if it improves
    Thanks, I’ll look into the area you’re talking about some more. I spent some time with the schematic as well and traced all the components along the CV trail that I might try replacing as well.

    It’s a shame the shop manual is so poorly scanned.

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