Re: Stuck note / tunings fail
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Thanks a lot for helping me out here, I really appreciate it. I opened it up and press on all the socketed ICs and reseated the connecting cables.? After I did this I was able to get it to tune all voices, but it's really strange.? It will tune them, but as soon as a plug in a cable for the voices or cvs, it will fail the tunings (this was in multimode). It was off for while and I just turned it on and plugged in the main LR cables and put it in single mode and it is passing all tunings and seems to work fine as a poly synth. However, whenever I plug into any of the voice outputs, the pitch and amplitude seem to be glitchy for all of them.? It's like they are being modulated randomly (it kind of reminds me of how the pitch would waiver before I recapped the
PS).? The output of the master is fine though.? Also, maybe worthy of note is that whenever I turn it on and it doesn't tune, I can tell as soon as I turn it on because it sort of pops and makes a sound like a machine starting up or a computer being turned on.? It is usually pretty quiet when I turn it on. I am hoping this information is characteristic of a problem you have seen before.? I have no trouble replacing components, but my diagnosing skills are limited.? Thank You, Chase Smith
From: Karl Schmeer
To: xpantastic@...
Sent: Sun, March 14, 2010 10:06:15 PM
Subject: Re: [xpantastic] Stuck note / tunings fail
Hi Chase,
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Sounds like the?final VCA is stuck open.? For all voices if in mono keybooard mode.
You may have tried this, but
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What happens when you change patches? Same issue?
Is the Xpander keyboard mode set to mono?
If so what?happens when you change keyboard modes?
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Check the VCF/VCA page. and?make sure?the?final VCA
is turned all the way down, and all modulations are turned off or down.
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If it's not the above, then reason dictates a hardware problem.? This may be as simple
as opening up the Xpander and reseating the IC's, on the analog board. All chips are in sockets and this is easily acomplished. Just push on them all, to make sure none have come loose. While your at it check to make sure all connectors are
Try these things and see if it helps. Let me know what you find, and we can go from there.
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Best Luck
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Karl Schmeer
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--- On Sun, 3/14/10, plus_321 wrote:
From: plus_321
Subject: [xpantastic] Stuck note / tunings fail
To: xpantastic@...
Date: Sunday, March 14, 2010, 8:51 PM
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I powered down my xpander and it was working perfectly (pass every tuning all the time after I recapped the ps years ago). I turn it on a few minutes ago and it behaves like there is a note stuck. Playing midi notes will change the note that I hear. Also all tunings fail.
I tried a system reset, it did nothing. I tried to change the pedal stuff, but it did nothing. I'm really hoping someone has an idea of what this is. I really want to finish the song I was working on and I kind of need this instrument.
Thank You,
Chase Smith
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