Upon research, I've seen where these Sega Genesis/Mega Drive attachments definitely need the surface mount electrolytic capacitors replaced, because of the corrosion they can cause from leakage. From what I've seen, a lot of folks simply replace them with through-hole electrolytic capacitors. Which was what I originally was going to do until I seen GameTechUS' video on a Turbo Grafx Duo with replacing its capacitors with the SMD ceramic capacitors. While at the same time, someone kindly pointed out Dave's video on ceramic capacitors and their voltage dependency.
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While it was very informational, I'm still left a bit confused since I'm still a beginner on electronics. Though I've replaced capacitors quite a few times with more direct replacements or someone already enlightening me on what to replace them with. So I'd like to ask a few questions on this topic to see if these will still be pretty ideal for my Sega CD or if there's a better route to go.
So basically I want to start off with was the mention of DC bias offset in the video. Is this basically the same as a just hooking it up to say a 5v DC power source or a battery? Is it that any DC voltage at all will reduce the capacitance of a ceramic capacitor at all?
There are ten 10uf 16v electrolytic surface mount capacitors on the main board that are leaking that need to be replaced. (I'm assuming 91% Isopropyl alcohol is ideal for cleaning it all up?) I thought the idea of using ceramic capacitors will be easier and a lot cleaner than trying to use through-hole electrolytics, especially long-term.
https://www.dropbox.com/s/dgohlexn6k23va9/Mega%20CD%202%20of%202%20A3.pdf - Here are the schematics on the console.
Based on what I seen it uses an NEC 2405 voltage regulator so there's 5 volts DC within the system. If I'm understanding correctly, based on what Dave has said and resource like this:
http://www.murata.com/en-us/support/faqs/products/capacitor/mlcc/char/0005 there is a 40% decrease in capacitance? So say a 10uF cap would be more or less a 6uF on 5V DC? If that's the case wouldn't a 15uF capacitor be more ideal to bring the necessary value closer to what it needs to be? Like any of these caps?
https://www.digikey.com/products/en/capacitors/ceramic-capacitors/60?k=&pkeyword=&pv13=93&FV=380009%2C440005%2Cffe0003c%2C1c0002&mnonly=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=25I'd like to do what's best for the console since I want it to last as long as I can possibly make it can.
Also the capacitor placement numbers are: C41, C42, C43, C44, C45, C46, C47, C48, C49, and C50.
With the caliper I measured 3.5mm on the width of the base on the existing capacitors, the soldered sides.
Pictures: