Oberheim Xpander voice fail problem

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Oberheim Xpander voice fail problem

Postby pinksoir » Sun Dec 07, 2014 9:14 pm

I noticed today that a voice in my Xpander was failing the autotune routine for both VCOS and PW. It's the same voice for both failures, 3. Actually, when I reset it the voice is perfectly in tune, but there's only one oscillator working - VCO 2. Anyone know what could be the problem here?

Cheers.
"I think it would be egotistical of me to say, 'I thought of it'. What happened is, I opened my mind up and the idea came through and into my head." - Bob Moog

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Re: Oberheim Xpander voice fail problem

Postby synthparts » Sun Dec 07, 2014 9:31 pm

Sounds like it could be a dead CEM3374 dual VCO chip. You could try swapping it to another voice and see if it fails. I have the chip In stock if you need one.
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Re: Oberheim Xpander voice fail problem

Postby pinksoir » Sun Dec 07, 2014 11:03 pm

Thanks synthparts, I'll try swapping it out. I have a gut feeling I'll be calling upon your services soon enough though :)
"I think it would be egotistical of me to say, 'I thought of it'. What happened is, I opened my mind up and the idea came through and into my head." - Bob Moog

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pinksoir
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Yamaha CS-15,
Yamaha SK20.
Band: Bear Worship

Re: Oberheim Xpander voice fail problem

Postby sam » Thu Dec 11, 2014 8:09 pm

Take your time ..ease the chip out gently..make sure it goes back the right way.

Silly things do and can happen....
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Re: Oberheim Xpander voice fail problem

Postby pinksoir » Tue Dec 16, 2014 2:36 pm

Yup. It's definitely the 3374. I swapped it around and it causes the new voice to fail tuning... Bummer!
"I think it would be egotistical of me to say, 'I thought of it'. What happened is, I opened my mind up and the idea came through and into my head." - Bob Moog

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pinksoir
Junior Member
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Posts: 187
Joined: Thu Dec 08, 2011 12:58 am
Location: Ireland
Real name: Karl
Gear: Korg Volca Keys,
Korg Polysix,
Roland JX3P,
Teisco SX-400 ,
Yamaha CS-15,
Yamaha SK20.
Band: Bear Worship


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