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Vintage Synth Repair

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Re: [vintagesynthrepair] Korg MS20 patchbay section problems.

2009-10-24 by Malte Rogacki

> also the headphone output is very low.
>
> any ideas?

Since all the affected functions/modules reside directly on the KLM-128
board (the patchbay board) I believe that at least one of the supply
voltages is missing (or misbehaving) directly on this board. So my first
attempt would be measuring the supply voltages at various points. I'm not
completely sure but I think the supply enters KLM-128 on connector H4.

-- 
Malte Rogacki gacki@...
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"Don't forget to TURN ON THE SYNTHESIZER. Often this is the reason why you
 get no sound out of it." (ARP 2600 Owner's Manual)
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