Blacet Phaser LFO issue

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recompas
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Blacet Phaser LFO issue

Post by recompas » Fri Aug 15, 2014 9:32 am

I'm having a strange issue with my Stonez phaser. On startup the LFO runs, but after a short time it sort of stops and none of the controls get it going again. Not sure where to start. I tried a little while ago to debug it, and replaced the LFO op amp thinking that might be an issue. Now I'm wondering about the CV mixer section.

Any thoughts?

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fracmonkey
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Post by fracmonkey » Fri Aug 15, 2014 3:18 pm

Sounds like a cold solder joint. These have a characteristic donut shape when viewed under magnification. If the LFO starts back up when you wiggle the PCB, then this might be the culprit...

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