SMS missing resistors

misjah · Post by **misjah** » Sat Nov 08, 2008 7:38 am

Hi, I just bought used Sega Master System with two broken resistors. The first one is R1, i can see values because this one is still on the board (4.7k) but the R2 is ripped off. I found some SMS schematics but cannot locate it, so if anyone have good schematic or can open Sega to readout the resistor....

Tibia · Post by **Tibia** » Sat Nov 08, 2008 11:16 am

If you don't get an answer before tonight, I'll take a pic of my SMS from down at the shop. I can't get down there before, though. Sorry.

misjah · Post by **misjah** » Sat Nov 08, 2008 11:39 am

ok, thanx. Note that my version is made in china (Hong Kong), I found some pics on net but these parts positions are not matching....

Tibia · Post by **Tibia** » Sat Nov 08, 2008 11:44 am

Well, as long as they're labeled on mine, I should be able to find them okay.

Tibia · Post by **Tibia** » Sat Nov 08, 2008 8:34 pm

Mine is so totally different. It starts numbering at 5, and skips all over the place.

I've got two resistors near where yours are, labeled R102 and R103. Both have different values from yours, but they are both the same value. If I was in your situation, I'd use the same value on both spots.

Out of curiosity, there should be the letters MK and a number by the Sega logo on the board. I have an MK4. What's yours?

misjah · Post by **misjah** » Sun Nov 09, 2008 8:07 am

Apparently it is the same value, found some other (not so clear) pics.... so I put the resistors and found that the top case is destroying them - the cartridge input plastic that goes all the way to the board. In my case only paint was scrubbed from the resistor.... So, the next thing I should do is to build controllers and find some carts... very hard to find in my country - I was lucky enough to find the console, the person who sold me didn`t have any other accessories and didn`t even know what is selling....
btw, you mentioned some shop earlier?

freeshiny · Post by **freeshiny** » Sat Jan 10, 2009 2:02 pm

I don't know if you still need the info, but I just got some old SMS, and registered just to confirm that R1 and R2 are the same.

Good luck!

misjah · Post by **misjah** » Sun Jan 11, 2009 8:01 pm

Yes, I used the same resistor and it`s working..... thanx