Hi all,

I just a bought a 412 in 1 vertical multicade board for my jamma arcade cabinet but am having a problem.....

The monitor works great with an older multicade board.... not exactly sure what the board is as it only plays the 3 donkey kong games... thoughts ?

3rd picture is the older board working in the machine'
2nd picture is the 412 in 1 board, looking strange as it boots
1st picture is the 412 in 1 board after it has booted.

Any suggestions.... I was thinking that if one jamma board works on the machine all should... but maybe they are different.... do I need to hook up the Vsync Hsync differently ?

Thanks for any help.

Jim

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pictures showed up in reverse order, sorry about that...

I have confirmed board is feeding CGA not VGA....

I know. I know... on the Xevious machine.... all I can say is I tried to fix it... rebuilt the power supply... read everything i could, reached out on other forums... could not get it to work.... I would have MUCH preferred it just ran the original hardware.... when it comes time to sell it, all the original parts are still there.... and if someone has the skills, maybe the can get it working. In the mean time, would be nice if it could play xevious, even if it is via a multicade...

I will double check CGA and VGA... but I dont think that is it.

Thx in homearcades....

Its interesting.

I checked the dips via the manual, they seem to be ok.
I checked looked at the manual fo the monitor... I seemed to have the inputs wired up ok including the syncs... BUT

I put the 412 in 1 in a different jamma machine just for kicks... and it does not have the issue in the other jamma cabinet (screen was upside down, but that is just a setting issue).... so clearly something is wrong or different in the first cabinet.... (even if it plays a 60 in 1 board just fine).

The 412 in 1 must need something its not getting with that harness. Only difference I can see is that the jamma harness where the board is not working has less wires on it... i.e. no grounds on pin 27 & 28.... if I figure this out I will post so everyone has the learning....

Jim

Happy to look at the syncs when I get home...

but if the 60 in 1 board works perfectly fine... why would the other board have a sync issue ?
The other thing I should mention is that the picture is not "rolling" in anyway.... I thought the adjustments dealt with rolling issues.... no ?

I am clearly an arcade monitor rookie.

Ok

So the monitor inthe machine is the following:

http://slot-tech.com/amusements/monitor_schematic_diagrams/matsushita/TM202G.pdf
Might just be the original monitor. All made in Japan.

So I have adjusted the syncs... but not dice.... Horizontal sync did not appear to do all that much... screen would get a bit skinnier.... The veritcal sync had an impact, but it just made it roll... vs being stagnant. At least the two pots work

Jim

Hi,

Thanks for everyone input above... love all the tech help.

So to recap....

60 in 1 works in the machine just fine

412 gives the picture that looks like it has a v sync issue.

I have adjusted both the V and H sync's and neither fixed the issue. The monitor is a matsushita TM202G. (link to schematic above). Both adjustments were on the chasis in case anyone needs to know in the future.

I just got done grounding all pins that were not grounded... that did not solve.

I am stumped.
Let me try small tweak again to the pots... maybe I was too heavy handed....

Jim

Picture of my jamma harness.... I grounded pin 14 because I thought that might be the issue... but nope... (monitor is being grounded from the bundle on the right. I also grounded the empty pins on the left... and that did not solve anything. FYI, the board attached is not the 412 in 1.... I just put that back on to see if I got the H and V sync adjustments back to where they worked.

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