I have my $75 board.
As do I, my friend.
ArcadeShop board not true JAMMA?
- Thread starter pacray
- Start date
As do I, my friend.
OP
OP
pacray
Well-known member
Maybe his Jamma harness is wired wrong. It may work on some games but not others. Not all Jamma boards use all the connections and someone could have got one wrong.
It's a Bob Roberts JAMMA harness, and it tests good on 48 and 60-in-1 boards. Power supply is also a Bob Roberts tested Happ PS. I have built over 100 JAMMA cabs in the past few years, so I think I can say with confidence, the problem is not with the harness or the wiring.
Take a photo of the edge connector... both sides... from the board you fried.
Spyridon
Well-known member
skyline7
New member
I agree they're pretty pricey compared to the XX-in-1 boards, but the working high score saves and additional trackball games were enough to get me to switch. Also, the "feel" on certain games seems better on the AS board. My wife always complained that the joystick input on Ms Pacman "felt wrong" on the 60-in-1. No complaints with the AS board.
VectorJunkie
Well-known member
I don't think it matters how many you have built. You should go through and verify there are no shorts or other issues with the harness and power supply in this cabinet. The knockoff boards are supposed to be coming out of the same factory and I wouldn't expect those to be any different. As the others have been suggesting though, even that should be verified with high-res pictures of both sides of the connector. Something is frying the boards, and it is probably not the boards themselves since you fried two.
OP
OP
pacray
Well-known member
VectorJunkie
Well-known member
If I'm looking at the pinout right, that board has stuff on the +12V pin. You can see if hit that via and the via looks like it comes out in the middle of a trace on the other side. The picture isn't quite high-res enough to tell for sure, but there is certainly no point in have a via if it goes to nothing.
The -5 is clearly a dead end.
VectorJunkie
Well-known member
It looks like the AS board uses +12 and -5 when used in Horizontal mode according to the AS pinout info. They mark them as not used on Vertical mode.
http://www.arcadeshop.com/multi-pcb/multi-pcb.htm
OP
OP
pacray
Well-known member
Right from the arcadeshop website linked above...
VectorJunkie
Well-known member
Yeah, saw that and then they went and conflicted that in the Horizontal section as I mentioned...
Vertical section has what you quoted and this...
Horizontal section has this...
Obviously they could have forgot to flag -5 and +12 as "(note used)".... Of course his board has components on the +12V line and the -5V now that I can see the component side better. The arcadeshop board also appears to have components connected on those traces. Not sure why they would put traces and components on pins that they don't use the power from.
Well,
I just checked one of my AS PCB's and the traces go to the same components as what shows in his pics above. Not sure what that's all about... but I do know the board runs in vertical mode on +5 only. I've not tried it in horizontal mode.
What I can say though is that this situation now points to either (A) a bad harness or (B) bad wiring of the harness. I can't imagine two boards frying the exact same way.
Pull your harness and meter the +5 pins, the -5 pins and the +12 pins to make sure.
I just checked one of my AS PCB's and the traces go to the same components as what shows in his pics above. Not sure what that's all about... but I do know the board runs in vertical mode on +5 only. I've not tried it in horizontal mode.
What I can say though is that this situation now points to either (A) a bad harness or (B) bad wiring of the harness. I can't imagine two boards frying the exact same way.
Pull your harness and meter the +5 pins, the -5 pins and the +12 pins to make sure.
VectorJunkie
Well-known member
Well,
I just checked one of my AS PCB's and the traces go to the same components as what shows in his pics above. Not sure what that's all about... but I do know the board runs in vertical mode on +5 only. I've not tried it in horizontal mode.
What I can say though is that this situation now points to either (A) a bad harness or (B) bad wiring of the harness. I can't imagine two boards frying the exact same way.
Pull your harness and meter the +5 pins, the -5 pins and the +12 pins to make sure.
Ok, your picture is clearer... R6 is not populated so unless there is something on the backside (shouldn't be) then that line isn't hooked up. Someone with a board will have to follow those traces through the vias to see if those do dead end with no components. His photo was blurry and what was a component-less R6 looked like it had a surface mount component in that spot. Maybe the original design required the extra voltages and was later modified to not populate those components or need the voltages.
Edit: Of course there is clearly a component at D2 which is on the +12V line... Anyway... It is possible that it doesn't need -5 or +12, but that it can generate what it needs when they are absent. That is what those 10" LCD screens that were being sold on here did. Just a thought...
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Spyridon
Well-known member
I'm running the AS board in Horizontal mode and I have the +12v populated on the harness. Not sure if the board uses it, but I am feeding it into the harness and the board runs fine.
