Vintage Synth Repair

Alright, I got a chance to try this out, and it seems to have made things better, but I'm not sure its completely fixed just yet.

I clipped the FETs located behind the L and R jacks.  The output definitely got louder from both jacks, and the headphone jack, but it seems (and I've now confirmed with my mixer) that the L output is considerably quieter than R.  I *may* have heard a bit of crackling there also, I'm not sure... I have to play a bit more and see.

Anyway, it seems like progress, which is good! Thanks for the assistance... Any suggestions going forward?

Thanks


> It is not uncommon for failures of the J109 FET's on each output of the K2000 to fail. They are there to prevent turn-on thumps through your speakers.
> You can also put the synth into diagnostic mode and run the relevant tests. Or, you can save your patches to floppy and hard reset the machine as a first step in case it is a software issue.
> 
> 
> ________________________________
> From: soundcrafter <aurastar@...>
> To: vintagesynthrepair@yahoogroups.com
> Sent: Tuesday, July 14, 2009 9:16:43 AM
> Subject: [vintagesynthrepair] Kurzweil K2000 Query
> 
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> 
> 
> 
> I'm taking a look at a K2000 for a friend. 
> 
> We were playing, and suddenly the K2000 lost volume...  It wasn't a dramatic loss, the patch was still audible, but there was *definitely* a loss in volume.  The patch wasn't changed or edited, mixer settings weren't changed, etc.  It just got quieter all of a sudden.
>