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Main => Main Forum => Topic started by: quarterback on November 07, 2004, 10:05:27 am

Title: Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: quarterback on November 07, 2004, 10:05:27 am

Just bought an old cab (my 1st) and I'd like to pull everything so I can get inside and clean it up.  It's got a 4player CP connected to a Jamma board.  I can just start pulling the connectors apart and/or label each one, but I was wondering if that's necessary.

Is there a standard jamma wiring identification method based on wire color or something?  I'd just like to have the ability to reconnected each thing correctly after cleaning.

Also, what's the best way to clean the bottom of the buttons/joysticks?  They're not really dirty, just some cobwebs, but I figure if I'm going to clean the thing up, I should do it right.

Thanks

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: Ken Layton on November 07, 2004, 11:24:26 am

The only wire colors standardized in JAMMA is the +5 volt (red) and Ground (black). Other wires in the JAMMA harness could be ANY color depending on who manufactured it. :o

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: quarterback on November 07, 2004, 11:53:16 am

So, if I physically disconnect the wires from the controls themselves (by pulling the disconnects off the leaf-switch tabs), I either need to keep detailed notes about what-went-where or I'll be screwed when I try to put it all back together?

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: pointdablame on November 07, 2004, 01:34:39 pm

Well there is a standard JAMMA pinout that says that pin xx corresponds to P1B1 or coin return slot, etc etc.

Assuming your cab is wired correctly for JAMMA, and you can see where the wires are coming from on the harness, you could figure it out that way.  It might not be fun having to count out which wire is which, but it's possible.

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: paigeoliver on November 07, 2004, 03:00:50 pm

Quote from: Ken Layton on November 07, 2004, 11:24:26 am

The only wire colors standardized in JAMMA is the +5 volt (red) and Ground (black). Other wires in the JAMMA harness could be ANY color depending on who manufactured it. :o

There seems to be a bit of a color standard now based on the colors bob robert uses in his harnesses, but this does no good for old cabs.

The only reason I say that was that my new Multiwilliams panel from apollo amusements matched the color of EVERY SINGLE WIRE on my new bob roberts jamma harness.

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: SirPeale on November 07, 2004, 08:33:58 pm

Maybe it was one of Bob's harnesses?

Here's a JAMMA pinout:

http://www.pealefamily.net/tech/mame/jamma.html

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: Goz on November 07, 2004, 10:57:39 pm

You can get a new JAMMA harness for between $10 and $20 from Bob or eBay, etc. These hardness' are usually labled. If you are doing a clean up... You could replace the harness.

-Goz

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: RayB on November 08, 2004, 01:18:36 am

I followed Bob's JAMMA harness instructions on how to group the wires with cable ties. I then labelled each group with a piece of masking tape (ie: "video", or "Player one"). You could take it a step farther and label each wire.... Why not? I didn't because the JAMMA connector itself is labelled.

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: paigeoliver on November 08, 2004, 01:22:13 am

Quote from: Peale on November 07, 2004, 08:33:58 pm

Maybe it was one of Bob's harnesses?

Here's a JAMMA pinout:

http://www.pealefamily.net/tech/mame/jamma.html

Well to clarify, I bought a new harness from bob, and a pre-wired multiwilliams panel from Apollo amusements, and the colors of all the wires matched. They wouldn't have been chopping up Bob's harness's to make these (too costly to do that), so I must assume they made them the same color on purpose.

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: SirPeale on November 08, 2004, 07:59:43 am

Paige: I misunderstood.  I thought that you bought a JAMMA harness from Appolo, and those colors matched one of Bobs.

Title: Re:Is there a std way to keep track of Jamma connections? Which wire goes where?
Post by: quarterback on November 08, 2004, 09:20:54 pm

Quote from: Peale on November 07, 2004, 08:33:58 pm

Here's a JAMMA pinout:
http://www.pealefamily.net/tech/mame/jamma.html

Thanks!