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Hahnsoulo

Sega Saturn power supply recapping question

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I recently purchased a MODE, and while I had my Saturn opened up to install it I noticed that some of my power supply caps are leaking.  So, I'm going to order the kit from console5 and recap it.  That's all well and good. The problem is that the kit only comes with the electrolytic capacitors, and on my board one of the little ceramic caps is leaking as well.   I'm hoping someone can tell me what the specs of this cap are so that I can order a replacement.   The power supply is the Yamaha XS205 Rev. D.   I'm guessing the 472 on the cap means it's 4700pF, but I don't know how many volts it is, or what a good modern equivalent might be if this one isn't made anymore.  I did a quick google research and I think the triangle emblem at the top means it was made by Matsushita.

 

 

saturncap.jpg

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By definition, dry caps can't leak; ceramic cap doesn't contain anything that can leak in any way. The white stuff you see is simply glue used to stabilize components : vibration from the mains (60 or 50 htz) will break solder joints, so glueing the bigger components reduce the stress on the soldering points. In fact you can see on your picture that it's the big black component that was glued, not that capacitor.

That being said, it doesn't hurt to replace electrolytic caps on your power supply.

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Hey Hahnsoulo,

 

To save you some potential headache coming your way. Looks like the Yamaha XS205 Rev. D doesn't like low-ESR capacitors, something to have in mind if, after recapping, you see horizontal lines on the screen. It happened to me and looks like I'm not the only one. Have a look at this: 

 

Hope this helps!

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5 minutes ago, eightbit said:

Those caps aren't "leaking". As said, glue to stabilize the components.

Very true. If they want to proceed with the recap anyway, the information above would be useful.

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