I’ve been having problems lately with my Taurus 2 not keeping a consistent pitch. If I hold a note down, the pitch will randomly go out of tune for a couple seconds. (modulation is turned off) It seems as though the oscillators aren’t getting consistent voltage. It does the same thing when I use either the original pedal controller or an external controller via the c/v inputs on the back. Could this be a power supply issue or faulty components?
I am good at fixing these things myself once the problem is identified. Sadly the service manual isn’t nearly as helpful as the highly detailed one for my Opus 3.
Has anyone had this issue before or have any helpful starting points?
Does it happen regardless of the notes played ?
It could be bad or dirty contacts from the pedal board buss bars or springs, maybe ?
Or dirty/oxidized contacts on the connector from the pedal board to the circuit ?
If all of those are clean and perfectly working (as checked with a multimeter), then it could be a dirty scaling trimpot, or a faulty CA3046 (if it happens on both oscillators at the same time).
But my bet is on oxidized/dirty contacts. 98% of the time, it’s simply that.
I originally suspected the pedal board but it still does it when I use an external controller (midi keyboard via midi/cv converter) which uses different jacks than the pedals. It does happen with both oscillators together and separately. I’ll check the jacks with a multi meter like you said and the scaling trim pot.
Also, cracked solder joint, bad contacts from ICs in their sockets (if they’re not all soldered), bad capacitors (especially Tantalums if there is any, they usually have a water droplet shape)…
FWI there is a dedicated Taurus sub-forum… you’d probably reach a more coherent set of eyeballs that way.
Stephen
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