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Subject: Re: [korgpolyex] a few issues with my Poly-800 (Non-working keys/strangely transposed)

From: Martin Ator <cyllall@...>
Date: 2012-07-30

The tuning problem is most likely a problem with the tuning slider itself, dirty/cracked solder/lack of use for many years. Also, it could have some battery acid damage inside if any batteries were left in it.
You could try some isoproply alcohol to clean the slider. I'm not a fan of  fader lube. I think it's a poor substitute for a strip and clean, but this may be beyond your capabilities.

The rubber keyboard contacts strips need washing in a very mild detergent to get all the cack off, then you need to cotton swab the carbon contact itself with some isopropyl and then paint the contacts with Caikote 44 (follow the intructions to the letter).It's not as good as the Circuitworks Rubber Keypad Repair Kit, but will be easier to use for a beginner, and it has a longer shelf life, so you may still be able to repair some other things a couple of months down the line.

There is NO WAY to clean the contacts so they work again contrary to popular internet BS. You must replace the old carbon/conductive ink coatings on the keypad to make them work. The keypads were not designed to last this long. I have repaired many myself. Just think yourself lucky that your poly doesn't have extra contacts for velocity sensing. They are a nightmare to repair.

Take your time over it and it should be a good job.

From: danstetich <danstetich@...>
To: korgpolyex@yahoogroups.com
Sent: Monday, 30 July 2012, 10:44
Subject: [korgpolyex] a few issues with my Poly-800 (Non-working keys/strangely transposed)

 
Hi,

I'm new to the forum and was hoping I could get some help. I searched for these topics

I picked up my Poly-800 used off Craigslist a few months ago and absolutely love it. It does have a few strange qualities that add to its personality though...

For one thing the entire keyboard (even when adjusting the pitch slider) is 4 semitones above the note it should be playing. For example when I play F it's actually an A. Really strange. Have any of you had this problem?

Also - within one week's time TWO of my keys have started to have loose connection when they only work when pushing down hard at the top of the key. Do any of you know a simple solution to fix this? Could it be just as simple as cleaning the contacts? I have very little technical know-how and am hesitant to crack open the Poly-800 until I have more of an idea of what needs to be done.

Any help would be greatly appreciated.

Thanks,
Dan