Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [PolySix] RE: Lots of pots not working

From: Bob Grieb <bobgrieb@yahoo.com>
Date: 2014-01-06

Josh,
 
   One thing to keep in mind - the CPU chip has code in it, so you can't simply buy a new one.   Be careful when probing anything that connects directly to the CPU.  Most meters will tell you how much voltage they use to measure resistance.   Good meters use a very low voltage to prevent turning on semiconductors in the same circuit.  This also helps to prevent damage.  Not saying you should remove the CPU when checking R72 or D10, as that has its own risks.  It's a MOS part and should be handled with care to avoid static damage.  Just saying be a little careful.

   Bob


From: "josh.nursing@gmail.com" <josh.nursing@gmail.com>
To: PolySix@yahoogroups.com
Sent: Monday, January 6, 2014 10:52 AM
Subject: Re: [PolySix] RE: Lots of pots not working, MG, VCF, EG.

 
You bet! Going to find if I can get one.

There does seem to be some funny things happening around CPU-P1, R72, D10 and even D11 (both ends of the latter are high...).

Will head out to the P.O. for a while and will be back to test these.

Bob, how do you reckon I should test all these? I'll first check the traces again I think, then I'll perhaps need to replace some of these.

Yash