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Posted by Nate Nagel on December 11, 2007, 7:49 pm
Puddin' Man wrote:
> Yamaha PSR-12, has maybe 72 keys, around 24 voicings, flexible-speed
> percussion, canned tunes, etc. About 20 years old.
>
> I turn it on lately, it works fine for 2-10 min., then freezes.
> The little light that is supposed to come on for beat 1 when
> one chooses percussion accompaniment locks on. That and the power led
> are the only things functional.
>
> The case has 2 halves. I workbench the thing turning the business
> end (with keys and most PCB's) up 90 degrees to tinker, and it plays OK
> for up to 3 hours (presumably lots longer). I figure the problem
> has to do with either gravity or heat buildup.
>
> There are PCB's for power and switching, and 2 big PCB's presumably
> for tone generation, special effects, etc. I tried some ribbon
> cable connections: wouldn't budge. I'm afraid of breaking a
> board or connector or ?.
>
> It's gotta be repairable. I think. :-)
>
> Any/all help/advice much appreciated. Know of a more productive
> forum for the query?
>
> Thx,
> Puddin'
>
> "Well, there's two trains runnin'.
> Ain't neither one goin' my way.
> One run at midnight,
> the other run just before day."
> - from "Still A Fool", Muddy Waters, maybe 1949
Clean it real well. My laptop started randomly shutting off/locking up
and I just blew the guts out with compressed air and it's still working
fine. Dust buildup was causing something crucial to overheat.
nate
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