Chase
Tony Cappellini wrote:
It looks like I won't need to do an A/B comparison with Jeremy's wave file, I can easily hear now that my Xpander is not working well.
Prior to this and the reason I had posted a message looking for someone local to the SF Bay Area was that only on 1 patch did my Xpander sound very bad.
I had found one voice which was flaky, so I turned it off.
Recently, I happen to hit several keys at once and could hear the vcos being grossly out of tune.
After trying to tune everything, I get FAIL across the board.
In the past, when I would see FAIL after running autotune, I would wait 30 min, run it again and all tests would pass. This is not the case now.
Fortunately, I've got a few spare CEMs which I hope are all working, that I can use to troubleshoot with.
I haven't looked at the service manual in years- I hope there are some measurements I can make with a voltmeter to give me some ideas.
I can probably borrow a scope to check for ripple on the output of the PS but don't really know how much ripple would be excessive for the XP PS.
All other front panel functions & midi appear to be working normally, so it's probably not likely to be a PS issue.