Yamaha CS-15 - recapping PSU

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caro
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Yamaha CS-15 - recapping PSU

Post by caro » Fri May 27, 2022 6:14 pm

Hi.

The time has come for my trusty CS-15 to get some maintenance after many years. Firstly I would like to replace all old capacitors on the power supply board – especially the two tiny blue 0.01 uF tantalum caps. They are old and I've heard they can short all the circuit if they fail. The problem is that I can't source new equivalent tantalums nowhere online. I thought of swapping them with low ESR electorlytics, but those are not available as well in 0.01uF... The only ones I can find are the ceramic type, which doesn't seem to be a suitable replacement. Any suggestions on where to look (preferably in Europe) or maybe you could advise on other substitutes? Thanks.

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madtheory
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Re: Yamaha CS-15 - recapping PSU

Post by madtheory » Sun May 29, 2022 1:15 pm

Work out the values for 2 or more leaded tantalum capacitors in series to get you 0.01uF? Make sure to check dimensions before you buy, for a neat and tidy fit.

I'd recommend joining "Vintage Synth Repair and Mods" group on Facebook. Best source of info from people who are actually doing this for a living and have experienced all of the catches that we don't see in the textbooks or college courses, or the service manuals!
Last edited by madtheory on Tue May 31, 2022 11:10 pm, edited 1 time in total.

caro
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Re: Yamaha CS-15 - recapping PSU

Post by caro » Sun May 29, 2022 8:22 pm

Sorry, my mistake, it seems I was looking at wrong capacitors on the schematics. The tantalums are 0.1 uF and they seem to be easily obtainable.

Anyway thanks a lot for your reply @madtheory!

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madtheory
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Re: Yamaha CS-15 - recapping PSU

Post by madtheory » Tue May 31, 2022 11:11 pm

You're welcome :D

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