Hi Tim
Thanks for the advice. Moving cards might be a way forward. Will give it a go.
On Thursday, June 11, 2015, Tim Conniff tconno@... [yamahacs80] <yamahacs80@yahoogroups.com> wrote:Hi BobYou bought a part from me a while back....80% chance there's nothing wrong with the supply at all.I assume you've thoroughly investigated visual possibilities on the 2 offending voice cards, butit's highly likely everything funky resides there.You MIGHT want to swap the location of a working card with one of the 2 bad ones, and see if the problem moves, because it could also be something external but related to that voice(s) giving thisheadache. Probably 45 minutes of soldering/desoldering to verify. God knows the wiring can create nightmares on these....but at least you'd know more than you do now about the prob.good luckTim
OK... so I'm going to build a power soak to try and pin this down. ie. whether it is actually the PSU or if it's something elsewhere causing the issue.
Measuring about 0.6A on the +15V, and 0.65A on the -15V... Does that sound about right?