Mortal kombat 2 to primal back to MK scrolling issue

FalkenZR

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Mortal kombat 2 to primal back to MK issue

So I've had this mortal Kombat 2 cab that was converted into the amazin' primal rage.
When I put a mk board I get the fast vert scrolling you would see with a hz issue.
But this being an original mk2 cab I'm not sure what has been changed for primal rage since both games are jamma +.
Help me out with where to start ,
And what the board is between the harness and the primal rage board.(pic)

Heres the pic of the board on the primal rage
IMG_2763-1.jpg
 
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dabble with your Horizontal and Vertical Sync pots on the monitor remote adjustment board. in a Midway cab you can most likely find this mounted underneath the metal monitor glass bracket (meaning you need to unlatch the control panel). they might alternatively be called H-Hold/V-Hold.

not all game boards are the same. this is predominantly why I abandoned my "Multi Kombat" project because I didn't want to have to keep adjusting the monitor for each game.
 
Heres the board on the primal rage board, on the back it has rev b. 'atari 89'
I just dont remember seeing one of these on a primal board before...
what is it for?(other than being dirty)

IMG_2767.jpg
 
dabble with your Horizontal and Vertical Sync pots on the monitor remote adjustment board. in a Midway cab you can most likely find this mounted underneath the metal monitor glass bracket (meaning you need to unlatch the control panel). they might alternatively be called H-Hold/V-Hold.

not all game boards are the same. this is predominantly why I abandoned my "Multi Kombat" project because I didn't want to have to keep adjusting the monitor for each game.

Vert hold fixed it thx, I was thinking it was a compatability issue like when using a supergun on a sony tv with a midway board etc...


Thanks
 
The small board is just a JAMMA filter PCB. Not needed at all. It's supposed to stop EMI but does it really?
 
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