Xpantastic!

I'm trying to find a CEM 3374.  Please email me at minime123 AT onebox DOT com (and not this hotmail account) if you've got one for sale.  
We've also got original used Oberheim Xpander encoders we'd consider trading (for a cem3374 ONLY).  
Thanks.
Mini

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________________________________

To: xpantastic@yahoogroups.com
From: plus_321@...
Date: Tue, 2 Sep 2008 12:05:45 -0700
Subject: Re: [xpantastic] It's official- my Xpander is sick







What about the DAC Mono test (pass or fail)?  I will guess that you can probably fix this by recapping the power supply board.  When I got my Xpander I had issues with the tuning tests and it being terribly out of tune and a recap fixed it.

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.











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