Making Capcom jamma adaptor, to many ground wires HELP!

here is the pinout of my Trojan board, Where should I solder the extra ground wires H,7,S,15

I dont see anywhere else to solder these. I already filled up all the spots labeled ground on the jamma adaptor. Which are spots A,B,E,F,1,2,27,28

Also, what are the areas on the pcb labeled (d5) and (d4) used for and what color do I use to make a connection with these. Also where are they soldered to on the JAMMA finger board?

Finally, what colors are used for the coin ground buttons? And where do they go on the jamma adaptor?

TROJAN, CAPCOM
--------------

SOLDER | PARTS
-------------------------------
gnd A | 1 gnd
gnd B | 2 gnd
+5v C | 3 +5v
+5v D | 4 +5v
Green E | 5 Red
Sync F | 6 Blue
gnd H | 7 gnd
-key- J | 8 -key-
2 shot2 K | 9 1 shot2
2 shot1 L | 10 1 shot1
2 up M | 11 1 up
2 down N | 12 1 down
2 left P | 13 1 left
2 right R | 14 1 right
gnd S | 15 gnd
select 2 T | 16 select 1
(d5) U | 17 (d4)
coin2 V | 18 coin1
coin gnd W | 19 coin gnd
X | 20
Y | 21
counter 2 GND Z | 22 counter 1 GND
counter 2 a | 23 counter 1
audio- b | 24 audio+
+12v c | 25 +12v
12v gnd d | 26 12v gnd
gnd e | 27 gnd
gnd f | 28 gnd

you can wire more than one ground up to the same edge connector pin. Most likelly, the traces are connected anyhow (at least on the ones next to each other, and/or above and below each other) colors aren't really important, but grounds are usually either black or green, and they can go to any ground pin on the jamma adapter.

stuffmonger said:

you can wire more than one ground up to the same edge connector pin. Most likelly, the traces are connected anyhow (at least on the ones next to each other, and/or above and below each other) colors aren't really important, but grounds are usually either black or green, and they can go to any ground pin on the jamma adapter.

Click to expand...

OK, so your sayin I can solder more than one ground to the edge connector. Can I solder both of them to the same location on the JAMMA finger board?

How would I solder 2 wires to one finger on the edge connector? It looks like it would be hard to get a wire on each side seeing how you really only have about a centimeter between the 2 fingers. Can I just put them on top of each other on the same side of the finger on the edge connector?

greedostick said:

OK, so your sayin I can solder more than one ground to the edge connector. Can I solder both of them to the same location on the JAMMA finger board?

How would I solder 2 wires to one finger on the edge connector? It looks like it would be hard to get a wire on each side seeing how you really only have about a centimeter between the 2 fingers. Can I just put them on top of each other on the same side of the finger on the edge connector?

Click to expand...

Well... depending on how long of a harness you are making, the easiest way would be to splice the wires together BEFORE you have to solder to the fingerboard. If you don't have space for that, you can also solder them directly onto each other. All you need is for them to make contact with each other. Any ground can go to any other ground (including the video ground) You also don't necessarilly NEED to connect all the grounds... it's a good idea, but not entirelly necessary (I'd say the only ones that you absolutelly NEED for the game to work are the video ground, a +12v ground, and a ground from both outer ends from looking at your pinout.) I'd suggest that you at least solder up one connection per pin that's not right next to another, and bridged by the circuit board tracks right at the connector (either a big ol' fat pin, or two that are connected at the top of the edge connector).

Thanks again

Also, what are the areas on the pcb labeled (d5) and (d4) used for and what color do I use to make a connection with these. Also where are they soldered to on the JAMMA finger board?

greedostick said:

Thanks again

Also, what are the areas on the pcb labeled (d5) and (d4) used for and what color do I use to make a connection with these. Also where are they soldered to on the JAMMA finger board?

Click to expand...

I have no idea what d5 and d4 are without a description or picture.