<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Jim-<div class=""><br class=""></div><div class="">Jim-</div><div class=""><br class=""></div><div class="">The Prophet 5 power transformer has a center tap on the secondary side that should be tied to case ground. The AC input ground should also be physically connected to case ground, as should the outside conductor of the 1/4" jacks.</div><div class=""><br class=""></div><div class="">This can be verified by inspection or by using an ohmmeter - please remember to disconnect from AC power first!</div><div class=""><br class=""></div><div class="">In the event that one or more of these connections has failed, it might cause the symptoms that you described.</div><div class=""><br class=""></div><div class=""><div class="">
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<br class=""><div><blockquote type="cite" class=""><div class="">On Mar 15, 2016, at 12:32 PM, Jim Blair <<a href="mailto:ceratos@shaw.ca" class="">ceratos@shaw.ca</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-family: arial, helvetica, sans-serif; font-size: 10pt;" class=""><div class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">Yeah, remember that this P5 is a "brain". So a bunch of work was done on it, who knows what went down, and how long ago. </span></div><div class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">But something's up in there. Now that I have a pretty good grasp of the symptoms, I'm going to talk to a local tech today. I'll report back with the results.</span></div><div class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">Jim</span></div><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class=""><div class=""><span style="font-family: monospace; font-size: inherit; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class=""><span style="font-family: monospace; font-size: inherit; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class=""><span style="font-family: monospace; font-size: inherit; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class=""><span style="font-family: monospace; font-size: inherit; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div><div class=""><span style="font-family: monospace; font-size: inherit; background-color: rgb(255, 255, 255);" class=""><br class=""></span></div>Could it not also be swapped primary lines in the P5? Has the</span><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class=""> </span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">transformer been swapped out?</span><br style="font-family: monospace; font-size: 12px;" class=""><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">On </span><span class="Object" id="OBJ_PREFIX_DWT219_com_zimbra_date" style="color: rgb(0, 0, 139); cursor: pointer; font-family: monospace; font-size: 12px;">3/14/2016</span><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class=""> </span><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">7:15 PM, Jim Blair wrote:</span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">> The mysterious P5 problem has been tracked down. I can't say for sure</span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">> that we know where exactly the problem lies, but I have called an</span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">> electrician to come and have a look at potential grounding problems in</span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">> the studio.</span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">></span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">></span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">> Basically, I ran the P5 into a DI with the ground lifted. Worked</span><br style="font-family: monospace; font-size: 12px;" class=""><span style="font-family: monospace; font-size: 12px; background-color: rgb(255, 255, 255);" class="">> perfectly. Then I checked it un-lifted. P5 freaked out.</span></div><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">_______________________________________________</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Synth-diy mailing list</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="mailto:Synth-diy@dropmix.xs4all.nl" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Synth-diy@dropmix.xs4all.nl</a><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=""><a href="http://dropmix.xs4all.nl/mailman/listinfo/synth-diy" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">http://dropmix.xs4all.nl/mailman/listinfo/synth-diy</a></div></blockquote></div><br class=""></div></body></html>