Donkey Kong Upgrading Problem

[Burner88]

I have a 2board DK and the original Sanyo monitor was dying so I tried to follow in the footsteps of Markevp in using a VisionPro 19in and the the DK conversion adapter with integrated power supply (www.arcadeshop.com). I hooked up the PS, attached the adapter, used the original wiring harness for the control panel and coinbox, used a rainbow cable to connect the two PCB, powered it up.....and nothing. No video, no sound, nothing. Is there something I am missing? It looks as if the PCB is not getting any power but I don't know. The board was working great before this monitor upgrading.

Please help!

[markrvp]

From your pictures, you still have the wires from the old power supply connected to the board (next to the coin and counter connectors).  The first thing I would try is disconnecting that one plug from the old power supply since all the power for the board is now coming from the switching power supply through the DK to Jamma adapter.

If that doesn't work, take a volt meter and make sure you are getting the proper 12v, +5v, and -5v voltages to the board.

In any case, on my DK boards, the only thing I have hooked directly into it is the coin mech buttons.  Everything else is going through the DK to Jamma adapter.

[Burner88]

Thanks for the quick reply!

Are there another connections to the monitor than from the adapter to the 6pin (in the upper right of the picture below)?

The adapter wiring harness came with two purple wires that I spliced with the cabinet speaker.

-David

[markrvp]

Yep, that one connector is the only thing that goes to the monitor.

R,G,B, Sync (H&V) & Ground

[Burner88]

My wiring harness did not have any additional wires to connect the control panel or coin box. Do I have the wrong wiring harness? I am now assuming there should be a separate connection to the CP from the adapter.

Speaking of wiring harness, where did you get your control panel wiring harness (to connect the joystick and buttons to the pcb)?

[markrvp]

I used a standard JAMMA wiring harness.  They are available on Ebay from vendors like Tornadoterry and TwistedQuarter.  You can also get them from all the arcade suppliers including Bob Roberts.

When you convert a cabinet to JAMMA like I did with the Donkey Kong, the idea is that everything is wired through the harness, including the monitor, controls, power, coin door, and speakers.  You can still hook the coin door up as you did (and so did I becaue I was lazy).  The coin counter won't work without the original power supply because it needs non-standard power (I think 24v, but don't quote me).

I don't remember where the control panel connects to the DK boards, but you still may be able to hook them up that way.  If it were me, I'd get a fully populated JAMMA harness and rewire.  However, your machine should at least power up and get video and sound without the controls connnected.  I would pull that power connector from the old power supply that's connected to the PCB first and see what that does.

[Burner88]

Again thanks for your help.

I disconnected the old PS cable leaving just the coinbox cable but unfortunately. no signal. When I turn on the monitor, it flickers on but nothing more than a glow. I can control the brightness, horizontal and vertical but no game or sound. I will need to check the PS to make sure I am getting the right voltage. Is there an easy way to check if I may have damaged the pcb or have a short somewhere? Or maybe I have a bad adapter? Bad wiring?

Arrggggghhhhh! Soooooooo frustrating.

[markrvp]

When I get home tonight I'll open up my DK cabinet and look at a couple of things to see if I can suggest something.

[AwesomeAlbert]

Look at Neilyboy Dk restoration, he unjamma-ed a dk cab,  the  parts he took off are the ones you need. (Big mess though, i would rewire) He had the original monitor though.

[Burner88]

I am going to replace the wiring harness from the JAMMA adapter with a full wiring harness from Mikes Arcade (www.mikesarcade.com). This will also require re-wiring the control panel and the coin box. Is there a relatively easy way to determine if the pcb is okay? It was working before this project started and I hope I have not done something stupid.

Markrvp, any suggestions?

Thanks,

-David

[markrvp]

I am going to replace the wiring harness from the JAMMA adapter with a full wiring harness from Mikes Arcade (www.mikesarcade.com). This will also require re-wiring the control panel and the coin box. Is there a relatively easy way to determine if the pcb is okay? It was working before this project started and I hope I have not done something stupid.

Markrvp, any suggestions?

Thanks,

-David

Did you ever check to see if you were getting the proper voltage out of the switching power supply?  If so, is it getting to the board through the Jamma harness?