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Fixing the sega cd model 2 fuse. - Video Game Consoles & Games

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I put a model 1 ac adaptor on the model 2 sega cd and it wont start

Posted on Oct 01, 2011

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Cant get power on sega cd 2. hooked up with genesis 1 console. both ac adapters work and genesis works fine. don't see any fuse inside sega cd


the fuses are solid state fuses, one is a small white top surface fuse on the bottom of the board the other is a green "resistor" looking fuse. both are marked with Fxxx ( the x's are numbers) check them with a meter for continuity so you dont change a good one.

Oct 20, 2013 | Sega Mega-CD Console

Tip

Keeping your Sega CD from Short-Circuting and fix it if it does


Sega/Mega CDs are fragile systems and one power surge will kill them but you can stop it
  1. Invest in a surge protector it will easily protect your console from most surges
  2. Unplug your Sega CD when not using it this will completely stop any risk of it becoming damaged.
Repairing it is a bit of an undertakingThis Requires Soldering skills and a basic knowledge of electronic components.
This is a more "unique" fix, I have not seen this anywhere on net before. It took a few hours to find this on my Mega CD 2... But should relate to all "newer" Sega hardware. They are not in the MD 1 or SMS 1 as far as I have seen.
This info applies to the PAL (AU - EUROPE) and NTSC (USA). (And possibly most other versions as well)
The internal fuse is a resistor like component that sits at the back of the Mega CD 2 near were the switch is to sense if the CD lid is open.
On this board the fuse is located on the soldering side, labelled "F301", and is rated at 2.5A. It is beige in colour( US Mega CD 2) OR Bright Green ( PAL Mega CD 2).
All you have to do is use a fuse holder with wire fly leads. Solder one of the leads to either end of the PCB were the legs of the internal fuse are.
firehand94.jpgPicture of a M205 in-line fuse holder with fly leads. (You can use 3AG size fuse holder.. they are just larger.. Which makes it harder to fit in the case.)
Pop in a 850mA fuse (AU PAL Mega CD 2) Will be higher around 1-1.5 A for the MD 2 or SMS 2. (don't exceed 2A).




1. Open Mega CD II, Remove the screws (5) that hold down the metal shield (Red Arrows). Also there are 2 metal "tags" that hook under the slot were the MD connects to the Mega CD (Blue Arrows). These need to be bent back so the shield can be lifted up.
firehand94_1.jpg

2. The shield has been removed. The fuse is located in the red circle area.
firehand94_2.jpg

3. View from the left hand side.
firehand94_3.jpg

4. Close up of the fuse marked "F301"
firehand94_4.jpg
There are a few versions of Mega CDs and Megadrives that don't use the fusible resistor like the one in the picture above. Instead underneath the PCB in about the same location is a white rectangle surface mounted fuse. Should have like X.X A on it. To fix this... you do the same thing.. But solder each end of the fuse holder to each side of the surface mount fuse. I think it is still labelled "F301" though. Below is a picture of it...
firehand94_5.jpg

on Feb 28, 2011 | Video Game Consoles & Games

1 Answer

Missing the part that plugs from console to television where do i find?


  • Hi, I can help.




  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Aug 29, 2011 | Sega Genesis Console

1 Answer

My sega cd model 1 has no power, I think its the fuse, how do I go about replacing it?


Because that sega is a somewhat outdated console, it will be very difficult replacing the console without knowing what specifically is wrong with the device.

Mar 07, 2011 | Sega Mega-CD Console

1 Answer

Help! My Sega-Mega CD won't work. The MegaDrive works just fine (I played a game on it just 5 minutes ago) but the Mega CD won't even start. I've set it all up, referred to the manual and reset it and done...


the fuse has probably gone in it, thats a common problem with the sega cd's, you will have to replace the fuse on it, try looking up "sega cd model 2 fuse repair" in google and there should be some info/video's on the net to help you ;) I only know because I have the same problem lol

Dec 10, 2010 | Sega Mega-CD Console

1 Answer

I get a blank black screen when i turn on my sega


Take the game out and put it back in SEVERAL times.. try blowing the cartrage or the reader...there may be dust..also make sure there is nothing on top of the sega or touching the cartrage...make sure the sega isnt moving and is on the floor or on a shelf

Jan 05, 2010 | Sega Genesis 2 Console

1 Answer

Hi can you tell me what amp fuse do i replace for the internal fuse on the pal sega mega cd 2 please


The fuse labeled F301 inside the MEGACD is 2.5A. It is beige in colour( US Mega CD 2) OR Bright Green (PAL Mega CD 2).

Most guides I have seen say to replace it with an 850mA, and never anything exceding 2A

Oct 27, 2009 | Sega Mega-CD Console

2 Answers

Sega genesis


don't panic
sometimes the LED goes on the Megadrive
so try to tune it in anyway. (clean a game and put it in)
also sometimes you can get a "Dry joint" at the power port at the back of the megadrive.
this is fixed by unscrewing the megadrive and a little solder on the each of the 3 joints.

May 19, 2008 | Sega Genesis Console

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