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Consoles/Sega/Wondermega

Sega — Wondermega

Sega Wondermega HWM-5010 Full Restoration (2nd Unit)

November 25, 20251 thread~2 min read
Disc tray won't openLeaking capacitors
RecapDeep cleanDrive-belt replacement

A pig to take apart and put back together, but the end result speaks for itself. Both the Mega Drive and Mega-CD sides of this Sega Wondermega HWM-5010 are fully operational.

Parts & Tools

Replacement drive belt

Console5 JVC drive belts, used for the Wondermega's CD-drive belt replacement.

hitmanmcc
hitmanmcc

November 25, 2025· Thread 1· 10 tweets

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Little did I know I was about to enter into a world of pain. This thing is kind of a pig to disassemble and reassemble. Nevertheless, onwards we go into a restoration thread. 🧵 #sega #wondermega #megadrive #megacd #retrogaming

2 / 10

Recapped the Mega Drive side then removed the various regulators for cleaning, as there were some signs of leakage. Out then back and moved into the next board.

3 / 10

Next up, recapped the video board.

4 / 10

Recapped the laser PCB and lubricated the sled and gears. This is a bit finicky to do as the laser is kind of awkward to remove and the PCB with the caps has a couple of short flexes soldered to it. The pickup is a JVC Optima-5 for those wondering.

5 / 10

Afterwards I moved on with recapping the CD-ROM board.

6 / 10

Finished the recapping process with the sound/control board.

7 / 10

Put on a new belt for good measure.

8 / 10

After removing all this old garbage, here is the end result, it powers up fine. Both the Mega Drive and the Mega-CD side work well Let's test some more.

9 / 10

Contra hard Corps to test the Mega Drive and Silpheed to test the Mega-CD.

10 / 10

Finally, what we're all here for, a video of that motorised tray opening and closing. ☺️ Sega does... 😉

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