sbardelli
Active member
Hey guys...
I am restoring a Jump bug that was converted to Mr. Do!
Everything was finished, except I didn't have a Jump Bug PCB.
Well, I finally bought one. It came with an edge connector that also connected to a Jamma Harness.
So I had two options.
Re-wire the Cabinet to OG jump bug... or re-wire with a Jamma harness.
I opted for Jamma. It seemed easier.
So I took a jamma harness, wired up the essentials (+5, ground, +12, -5) and re-wired the control panel.
Sent the wires to the monitor.
There were a few connectors that didn't go to anything.
I turned it on and have a super-blurry... and very unstable looking picture on the screen.
I can see the twinkling "stars" of the background, but the main image is severly distorted.
It looks like a sync. issue, only its not scrolling.
Is there something I should have hooked up, but didn't?
I thought it was a monitor/picture image... so I tweaked a bit with the red, green, blue and sync wires. Nothing. Also, the cabinet I stole the jamma harness from had the same monitor. A k6100.
What could I be missing? What needs to be wired in to make a Jamma harness work?
Like I said, there were some connections that I didn't hook up. Seemed like coin door stuff... nothing important.
What should I try next?
I am restoring a Jump bug that was converted to Mr. Do!
Everything was finished, except I didn't have a Jump Bug PCB.
Well, I finally bought one. It came with an edge connector that also connected to a Jamma Harness.
So I had two options.
Re-wire the Cabinet to OG jump bug... or re-wire with a Jamma harness.
I opted for Jamma. It seemed easier.
So I took a jamma harness, wired up the essentials (+5, ground, +12, -5) and re-wired the control panel.
Sent the wires to the monitor.
There were a few connectors that didn't go to anything.
I turned it on and have a super-blurry... and very unstable looking picture on the screen.
I can see the twinkling "stars" of the background, but the main image is severly distorted.
It looks like a sync. issue, only its not scrolling.
Is there something I should have hooked up, but didn't?
I thought it was a monitor/picture image... so I tweaked a bit with the red, green, blue and sync wires. Nothing. Also, the cabinet I stole the jamma harness from had the same monitor. A k6100.
What could I be missing? What needs to be wired in to make a Jamma harness work?
Like I said, there were some connections that I didn't hook up. Seemed like coin door stuff... nothing important.
What should I try next?

