[sdiy] Yamaha CS30 repair

[Kevin Walsh]

Hi all,
I have a Yamaha CS-30 in for repair that was dead on arrival. It only needed the dual diodes (D1 & D2) on the PSU replaced to get it working again.
I got it working by using two pairs of 1N4001's:

  *   One pair configured in common cathode
  *   One pair configured in common anode

Both secondary fuses were replaced with 1.6A fast blow fuses as per the service manual instructions. Given this, I figured any 2 or 3 amp diodes should work fine.
Being such a nice synth, I'd prefer to have the best long-term solution. Should I replace them with Schottky diodes for their lower forward voltage drop and efficiency, or stick with regular silicon diodes and opt for a higher current rating?
Any tips or recommendations for specific diode models would be most welcome.
Thanks,
Kevin.


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