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Gamesmonkey

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Hi all,
I have an Outrun pcb with this sort of screen corruption.

20210118_153442.jpg


So I grabbed the mem test roms and burned them and put them in and got this.

20210118_105226.jpg

I believe these are the RAM chips at the locations IC20, IC21, IC38, IC39?
So my question is where can I get some TMM2115BP-10 ram or what would be a good alternative to these?

Thanks for the help
 

KaPH33n

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-15L is slower than -10 by 50 nanoseconds... if it works it works though.
 

Gamesmonkey

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Many thanks for all of the help.
I will let you all know how I get on when the RAM arrives.
Cheers Justin
 

Gamesmonkey

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Hi
To follow this up the RAM was bad so I replaced all four RAMS with sockets and now the game runs fine.
However, there is a new problem of no sound. when first powering up the board you can hear a very rough scratchy sound and then nothing.

So far I have checked the 315-5218 Sega chip and reflowed it.
Looking for help and suggestions on what to check next, please.

Cheers Justin
 
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