Discussion about the Korg PolySix synthesizer group photo

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Discussion about the Korg PolySix synthesizer

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Re: [PolySix] Re: Issue with patch Led's and Bank Led's after replacing buttons

2015-01-20 by Bob Grieb

Hi,
     Easiest is to simply make the measurements and post the results to 
this group.   We can sort it out.   Resistance measurements are not expectedto be identical.   We are looking for big differences between similar circuits,not small variations.
     Of course you must make any resistance measurements with the powerturned off.   

     Bob

      From: "yanbu@comcast.net [PolySix]" <PolySix@yahoogroups.com>
 To: PolySix@yahoogroups.com 
 Sent: Tuesday, January 20, 2015 11:03 AM
 Subject: [PolySix] Re: Issue with patch Led's and Bank Led's after replacing buttons
   
    Thanks for that info Bob - I do not have an oscilloscope, not sure I know anyone out here that could check that. When you say to check the resistance from pin 2 on IC2 on KLM371 to ground, and then compare the resistance measurement from that signal to another data bus pin, what would I do if these are not identical? I think I see the steps that you recommended for me to test, but I am not sure if I understand what it is that I should do if the measurements are different. 
I'll try to look at those tonight, plus the D0 for those two chips. I'll study the schematic some beforehand to see if I can pinpoint these, this isn't something I have a lot of familiarity with but I will do my best since I really want to get rolling with playing my polysix again. Thanks.  #yiv7385680245 #yiv7385680245 -- #yiv7385680245ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv7385680245 #yiv7385680245ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv7385680245 #yiv7385680245ygrp-mkp #yiv7385680245hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv7385680245 #yiv7385680245ygrp-mkp #yiv7385680245ads {margin-bottom:10px;}#yiv7385680245 #yiv7385680245ygrp-mkp .yiv7385680245ad {padding:0 0;}#yiv7385680245 #yiv7385680245ygrp-mkp .yiv7385680245ad p {margin:0;}#yiv7385680245 #yiv7385680245ygrp-mkp .yiv7385680245ad a {color:#0000ff;text-decoration:none;}#yiv7385680245 #yiv7385680245ygrp-sponsor #yiv7385680245ygrp-lc {font-family:Arial;}#yiv7385680245 #yiv7385680245ygrp-sponsor #yiv7385680245ygrp-lc #yiv7385680245hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv7385680245 #yiv7385680245ygrp-sponsor #yiv7385680245ygrp-lc .yiv7385680245ad {margin-bottom:10px;padding:0 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