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having prolems with multijamma
jimmah:
Could the fact that it's not grounded toanything else be my issue. The manual says if using disk drive type power supply that the ground is already linked. seems a little misleading since it says you MUST link all the grounds and then in the next sentence it says is using a pc power supply not to worry about it.
CheffoJeffo:
--- Quote from: jimmah on February 06, 2006, 07:59:36 pm ---Could the fact that it's not grounded toanything else be my issue. The manual says if using disk drive type power supply that the ground is already linked. seems a little misleading since it says you MUST link all the grounds and then in the next sentence it says is using a pc power supply not to worry about it.
--- End quote ---
In my configuration, I use the power in the JAMMA harness to drive the controller board and use a PC power supply to drive the switch boards. I clipped the floppy connector from the PC power supply and ran a write from the ground to the ground spot on the controller board. Voila, common grounds.
While I know next to nothing about fighters, I think that you'll need the main power supply from your cabinet anyway since I believe you'll need -5v for the sound on at least some of the MK boards (IIRC, you can get the -5V to the switch boards using the auxiliary power pins on the switch boards).
So, I guess if I have a question here it would be: is the main cabinet power supply still connected to the JAMMA harness ?
After that I would ask if the LED on the controller board is lit ? What about on the switch board ?
Cheers.
jimmah:
contorller board is lit, not on the switch board, original power supply in cab is powering the controller. now let me get your ground right. you have the ground on the contorller going to the floppy clip which goes to the main ground in the cab?
CheffoJeffo:
Let me grab my manual ...
OK, on the PC power supply, I snipped the molex connector for the floppy drive and stripped the black ground wires, then crimped them to a length of wire with a butt connector. I soldered the other end of this extended ground wire to the ground point (labelled E in the diagram of controller connections ... it's a little hole right above web site address on the controller board).
The LED on the switchboard should only light when it is "active".
You might want to reset the jumpers for a 2-game system and install a second switch board. and see if you can get either to light.
I should also ask if you have a multimeter (if you don't, get one) to check the volatages coming from the second power supply (I had a PS where the fan would run, but no power).
Cheers.
jimmah:
Well cheffo help me solve my problem. I had to trick the power supply into thinking it was hooked up to a mobo. to do this I took the only green wire and spliced it with any black ground wire. Then once I had picture there was an issue with sound. I supplied -5 to the switch board via the ps and everything works wondefully. Thank you again cheffojeffo.
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