Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: NiN^_^NiN on May 05, 2004, 07:28:52 am

Title: Jamma Pinout Question
Post by: NiN^_^NiN on May 05, 2004, 07:28:52 am

I recently (last week end) got a cocktail cabinet and am maming it

i have a powersupply which outputs 5+ 5amp and 5- at 1amp

and 12+ and 12- at 1amp

Are these amp's ok to use on a jamma rig/harness etc?

i have a jamma connector i ripped out of my old cab and im just wondering if it is tomany AMPS for a jamma board?

im gonna hook up my 5" RGB lcd to the jamma wires so i wanna know if i can use this power supply??

sorry im a newbie at this more of a mamer not real arcade stuff.

Title: Re:Jamma Pinout Question
Post by: SirPeale on May 05, 2004, 10:17:59 am

I assume you're talking about a PC power supply, and no an arcade PS.

People have used PC PSs on arcade boards, but I'm not sure how it's done (other than the raw wiring).  

Title: Re:Jamma Pinout Question
Post by: NiN^_^NiN on May 05, 2004, 10:30:50 am

No a real arcade power supply it outputs 5amp on 5v + then 1amp on 5v - 12v + and 12v -

what is the max amperage/milliamps the jamma board usually has?

i wanna make sure its ok to use this arcade powersupply i got it out of my cocktail it replaced the old power supply that was in the cab then i got it a few now so the powersupply is in a black box where u wrap the wire around the screw then tighten it.

so is this PSU ok? to many amps?

Title: Re:Jamma Pinout Question
Post by: Ken Layton on May 05, 2004, 10:36:02 am

i have a powersupply which outputs 5+ 5amp and 5- at 1amp

and 12+ and 12- at 1amp

Jamma game boards don't use a "-12 volt". Most games need at least 2 amps on the "+ 12 volt" line. Also, the "+5 volt" line needs to be a minimum of 11 amps for most Jamma game boards. Your power supply is too wimpy for the job.

Title: Re:Jamma Pinout Question
Post by: DaveJ-UK on May 05, 2004, 04:12:24 pm

Shouldn't it be in the JAMMA specification, which can't be too hard to fine.

Or you could just stick an ameter across your power supply.

I thought +12 and +5 was pretty standard anyway.

Title: Re:Jamma Pinout Question
Post by: Ken Layton on May 05, 2004, 06:14:36 pm

Jamma specifications/standards are on the AMOA website: www.amoa.com/policies/industry/

There's no rule that says the minimum current the supply should put out, but speaking as an expert, I'd want a minimum rating of 11 amps from the power supply's "+5 volt" line. Jamma games do not use a "-12 volt". They do however use "+12 volts for sound (on board amplifier chips), 12 volt coin counting meters, and sometimes 12 volt coin door lights. You need at least 2 amps (preferably 3) on the "+12 volt"  line.

Many Jamma games tell you in their manuals what current ratings the power supply should have for the particular game board. If you connect a power supply too small for the job it may work for a few minutes then crap out from being overloaded. You need headroom on the power ratings.

Title: Re:Jamma Pinout Question
Post by: NiN^_^NiN on May 06, 2004, 03:01:27 am

Well i only am making a Super Gun

wanted to know if it was strong enough as it doesnt have any specs on the amperage output from where i looked.