Help With Turning On New Jamma Rig.

jimkirk

Well-known member
Joined
Mar 9, 2008
Messages
9,355
Reaction score
1,075
Location
California
I just finished putting a new switcher,iso and jamma harness in my new Multi Williams cab.
I still need to put the monitor in and wire the coin door.
What is the procedure to fire this thing up?
Once I hook up the monitor and coin door how should I go about turning this thing on without fear of frying my Jrok board.
I figure I need to check voltages on the new switcher but not sure how to do it right.
What else should I worry about?
Thanks in advance for any help.
 
lately I've been testing my switchers with... a coin door lamp holder with a #555 lamp. it's a 5 volt lamp, just hook one terminal of the lamp socket to the +5 and the other to the Ground (spare wires hooked through the terminal holes and alligator clips work nicely). this puts a 5 volt load on the power supply, and you can safely do +5 adjustments on it without fear of burning it out.

I particularly had to do this on one of those box-type Peter Chou units where the +5 adjustment pot was dirty. I was able to wipe the shit out of it while it was off, fire it up with the lamp attached and get it within like 5.10V and was able to adjust it up and down and not trigger the overload protection.

it's a fantastic way of doing it. I don't know what the JROK board's power demands are, but if you use my method it should work fine.

other than that, I think all that's really entailed in getting a JAMMA setup running is having the appropriate voltage wiring attached to a working power supply. all the other stuff like wiring inputs can come later. you might want to make sure the video and audio wiring is all hooked up for the sake of ensuring your board is working.

PM me if you have any other questions.
 
Thanks for the help.
I thought I read some where,that there needs to be a load on the switcher.
Hopefully I can get the monitor in tomorrow and finish up the wiring.
I have to swap the Tovis out of my DK and put a Sanyo in there then put the Tovis tube and chassis on a horizontal frame to go into the old Joust cab.
 
how much do you know about Williams stuff? I just got a Defender today, has a Sampo monitor in it. didn't get to tinker with it much, it's got a switcher in it, but it looks like wiring is still hooked to the original power supply board.

which cab is more popular for doing Multi Williams, the Defender (probably easier since it's a wood CP) or the Joust?
 
how much do you know about Williams stuff? I just got a Defender today, has a Sampo monitor in it. didn't get to tinker with it much, it's got a switcher in it, but it looks like wiring is still hooked to the original power supply board.

which cab is more popular for doing Multi Williams, the Defender (probably easier since it's a wood CP) or the Joust?

I have never had a Williams cab before,so I don't know much about the electronics inside them,so can't help there.
I have heard that Defender is probably the easiest for the multi but I like the style of the Joust type cab.
I also found my cab local for cheap,thanks to Tronguy.
It was empty and had no cp so I bought a Stargate cp and filled the holes and re drilled them for the Multi Williams layout.
 
The easiest way to test a JAMMA harness is a board made by Yaton. Most of their stuff is junk, but this is a gem (link). It tests power and controls in seconds.

As far as multi-Williams, any of the Williams cabinets is pretty easy to do. Most of the multi-Williams bezels and CPOs were produced for Stargate/Joust/Robotron sized cabinets. Stargate seems to be quite popular for converting to MW.

ken
 
Back
Top Bottom