Replacing Sega CD Model 1 Fuse

So my Sega CD Model 1 doesn't power on anymore and the most likely problem is the ruined fuse inside. I opened the thing last night to check, and wow it's a complex, thrown-together orgy piece of hardware mess.

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The blown fuse is the yellow-green colored piece shown in the circuit board sticking out, right? What is the amp and voltage of the fuse that I need to replace?

 

I believe it is 2.5A, 125V PICO II fuse.

Here are a few references:

http://www.sega-16.com/forum/showthread.php?16724-sega-cd-model-1-fuse-repair
http://console5.com/store/fuse-125v-2-5a-pico.html
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=071-936

 

I'd like to add a little note here that from what I have seen, those fuses start blowing up when the tray mechanism is either stuck or too hard to move due to old, toughened wads of grease. You might want to check whether everything is loose enough by turning the gears, gently, by hand. I always lube up the mechanism when I get a 'new' SCD1 unit regardless if its condition.

 

You basically just showed me exactly what I needed. I just bought two of those fuses from that site, and it was dirt cheap, and delivery is expected by this Wednesday! Thanks for the link.

 

You could just bypass the fuse (short it by twisting it so both metal leads on the bottom touches) but only if you fixed the sticky gears and are sure there are no other problem that can normally blow fuse. Not a good idea for long term use but OK just for quick checking to see if it works 100%

 

If the Mega CD's fuse is anything like the SNES' fuse (they should be, they're both picofuses) you can use a plain old glass fuse (of the correct amp naturally) in it's place. Glass fuses are cheaper and more common, not to mention quick and easy to replace if they blow again, so I recommend them. To install, just solder a wire from one of the contacts on the board to a glass fuse holder, and do the same for the final contact point. Then, just just pop the glass fuse into the holder

 

That fuse you ordered is for the Sega CD model 2, which uses a 2.5A. The model 1 uses a 1.5A fuse. The fuse should still work, but I'd recommend that you eventually replace it with the correct one.

http://www.amazon.com/Littelfuse-1-...&keywords=Littelfuse+1.5A+Pico+II+Fuse+5+Pcs.

 

IT WORKS. IT FINALLY WORKS!!





So I finally replaced the fuse inside my Sega CD Model 1. It currently works like a charm now. Thanks for the help and everyone. And a endless-special thanks to my dear dad. *love hugs him*

Now what Sega Mega CD games should I play on the thing?

 

That fuse sure did arrive quickly! Very cool that you got it working. :encouragement:

 

There's a tutorial here where they use a fuse socket in case it blows again.

 

When my Sega cd model 1 fuse died, I just wrapped a small copper wire around the legs of the fuse, and now it works, hopefully there is never a power spike or else RIP sega cd.

 

hi thanks for your post i have dound a Japaneses sega cd 1 and Japaneses mega drive 1 the mega drive 1 is fine i opened up my Japaneses sega cd 1 and yes the fuse is dead but some one has gut the wrong part to replace the fuse the fuse F1 is still there but they have cut out the diode at D1 dose any one know the value or can tell me the diode value D1 on a sega mega cd 1 please so i can fix her up

thanks for your time

thx1138