Korg Poly800/EX800 Users

Start with your external power supply. Is it is right voltage and does it have a current rating 300mA or higher?
Then check that the power supply rails in the Poly itself are stable. measure at first power on then measure again a few hours later. Are they stable?
/Mike


      From: "ianpoly800@yahoo.com [korgpolyex]" <korgpolyex@yahoogroups.com>
 To: korgpolyex@yahoogroups.com 
 Sent: Sunday, July 24, 2016 5:12 AM
 Subject: [korgpolyex] Re: POLY 800 MKII Drifting
   
    I thought I'd update, I never did solve the problem.  I ended up bringing the keyboard to a repairman, who thought he'd solved the problem replacing a couple caps, but fast forward $150 in repair hours and the keyboard still drifts. I left it for a week in the same spot and every once in a while would turn it on and watched it fall a few full steps.
The other day I left it on for an hour and a half and it drifted a quarter tone.
Does anyone have any ideas of what I should test in the guts?  #yiv6721939842 #yiv6721939842 -- #yiv6721939842ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv6721939842 #yiv6721939842ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv6721939842 #yiv6721939842ygrp-mkp #yiv6721939842hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv6721939842 #yiv6721939842ygrp-mkp #yiv6721939842ads {margin-bottom:10px;}#yiv6721939842 #yiv6721939842ygrp-mkp .yiv6721939842ad {padding:0 0;}#yiv6721939842 #yiv6721939842ygrp-mkp .yiv6721939842ad p {margin:0;}#yiv6721939842 #yiv6721939842ygrp-mkp .yiv6721939842ad a {color:#0000ff;text-decoration:none;}#yiv6721939842 #yiv6721939842ygrp-sponsor #yiv6721939842ygrp-lc {font-family:Arial;}#yiv6721939842 #yiv6721939842ygrp-sponsor #yiv6721939842ygrp-lc #yiv6721939842hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv6721939842 #yiv6721939842ygrp-sponsor #yiv6721939842ygrp-lc .yiv6721939842ad {margin-bottom:10px;padding:0 0;}#yiv6721939842 #yiv6721939842actions {font-family:Verdana;font-size:11px;padding:10px 0;}#yiv6721939842 #yiv6721939842activity {background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;}#yiv6721939842 #yiv6721939842activity span {font-weight:700;}#yiv6721939842 #yiv6721939842activity span:first-child {text-transform:uppercase;}#yiv6721939842 #yiv6721939842activity span a {color:#5085b6;text-decoration:none;}#yiv6721939842 #yiv6721939842activity span span {color:#ff7900;}#yiv6721939842 #yiv6721939842activity span .yiv6721939842underline {text-decoration:underline;}#yiv6721939842 .yiv6721939842attach {clear:both;display:table;font-family:Arial;font-size:12px;padding:10px 0;width:400px;}#yiv6721939842 .yiv6721939842attach div a {text-decoration:none;}#yiv6721939842 .yiv6721939842attach img {border:none;padding-right:5px;}#yiv6721939842 .yiv6721939842attach label {display:block;margin-bottom:5px;}#yiv6721939842 .yiv6721939842attach label a {text-decoration:none;}#yiv6721939842 blockquote {margin:0 0 0 4px;}#yiv6721939842 .yiv6721939842bold {font-family:Arial;font-size:13px;font-weight:700;}#yiv6721939842 .yiv6721939842bold a {text-decoration:none;}#yiv6721939842 dd.yiv6721939842last p a {font-family:Verdana;font-weight:700;}#yiv6721939842 dd.yiv6721939842last p span {margin-right:10px;font-family:Verdana;font-weight:700;}#yiv6721939842 dd.yiv6721939842last p span.yiv6721939842yshortcuts {margin-right:0;}#yiv6721939842 div.yiv6721939842attach-table div div a {text-decoration:none;}#yiv6721939842 div.yiv6721939842attach-table {width:400px;}#yiv6721939842 div.yiv6721939842file-title a, #yiv6721939842 div.yiv6721939842file-title a:active, #yiv6721939842 div.yiv6721939842file-title a:hover, #yiv6721939842 div.yiv6721939842file-title a:visited {text-decoration:none;}#yiv6721939842 div.yiv6721939842photo-title a, #yiv6721939842 div.yiv6721939842photo-title a:active, #yiv6721939842 div.yiv6721939842photo-title a:hover, #yiv6721939842 div.yiv6721939842photo-title a:visited {text-decoration:none;}#yiv6721939842 div#yiv6721939842ygrp-mlmsg #yiv6721939842ygrp-msg p a span.yiv6721939842yshortcuts {font-family:Verdana;font-size:10px;font-weight:normal;}#yiv6721939842 .yiv6721939842green {color:#628c2a;}#yiv6721939842 .yiv6721939842MsoNormal {margin:0 0 0 0;}#yiv6721939842 o {font-size:0;}#yiv6721939842 #yiv6721939842photos div {float:left;width:72px;}#yiv6721939842 #yiv6721939842photos div div {border:1px solid #666666;min-height:62px;overflow:hidden;width:62px;}#yiv6721939842 #yiv6721939842photos div label {color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;}#yiv6721939842 #yiv6721939842reco-category {font-size:77%;}#yiv6721939842 #yiv6721939842reco-desc {font-size:77%;}#yiv6721939842 .yiv6721939842replbq {margin:4px;}#yiv6721939842 #yiv6721939842ygrp-actbar div a:first-child {margin-right:2px;padding-right:5px;}#yiv6721939842 #yiv6721939842ygrp-mlmsg {font-size:13px;font-family:Arial, helvetica, clean, sans-serif;}#yiv6721939842 #yiv6721939842ygrp-mlmsg table {font-size:inherit;font:100%;}#yiv6721939842 #yiv6721939842ygrp-mlmsg select, #yiv6721939842 input, #yiv6721939842 textarea {font:99% Arial, Helvetica, clean, sans-serif;}#yiv6721939842 #yiv6721939842ygrp-mlmsg pre, #yiv6721939842 code {font:115% monospace;}#yiv6721939842 #yiv6721939842ygrp-mlmsg * {line-height:1.22em;}#yiv6721939842 #yiv6721939842ygrp-mlmsg #yiv6721939842logo {padding-bottom:10px;}#yiv6721939842 #yiv6721939842ygrp-msg p a {font-family:Verdana;}#yiv6721939842 #yiv6721939842ygrp-msg p#yiv6721939842attach-count span {color:#1E66AE;font-weight:700;}#yiv6721939842 #yiv6721939842ygrp-reco #yiv6721939842reco-head {color:#ff7900;font-weight:700;}#yiv6721939842 #yiv6721939842ygrp-reco {margin-bottom:20px;padding:0px;}#yiv6721939842 #yiv6721939842ygrp-sponsor #yiv6721939842ov li a {font-size:130%;text-decoration:none;}#yiv6721939842 #yiv6721939842ygrp-sponsor #yiv6721939842ov li {font-size:77%;list-style-type:square;padding:6px 0;}#yiv6721939842 #yiv6721939842ygrp-sponsor #yiv6721939842ov ul {margin:0;padding:0 0 0 8px;}#yiv6721939842 #yiv6721939842ygrp-text {font-family:Georgia;}#yiv6721939842 #yiv6721939842ygrp-text p {margin:0 0 1em 0;}#yiv6721939842 #yiv6721939842ygrp-text tt {font-size:120%;}#yiv6721939842 #yiv6721939842ygrp-vital ul li:last-child {border-right:none !important;}#yiv6721939842