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Vintage Synth Repair

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RE: Korg SQ-10 - wavering in pitch...

2013-11-06 by <noddyspuncture@...>

Thanks for the tips guys.


The power supply idea was the first that occured to me... but the way it's laid out on the main panel with the 12 separate circuits for the steps... step 1 is actually the farthest from the main power supply input!


Also, the only socketed IC's are the two I have just changed. Do any of you have the schematic?


I was wondering if anyone could advise as to where, apart from the main board with all the pots, I should be looking for somewhere, as mentioned by Mick, where the 12 steps 'separate' and could be individually affected. Each step has it's own 4007 IC... but I can't really see 11 of them going faulty at once...!?


Cheers,

TOM



---In vintagesynthrepair@yahoogroups.com, <painintheamp@...> wrote:

If any of the ICs in the signal path are socketed, I would CAREFULLY pull each and buff the leads with some 1000 grit wet sanding paper ( only dry)

--
Scott Frye

Audio-fixation.net

Vermont

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