What do you think I seen it on the real Bob Roberts

Jerel63

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What do you think I seen it on the real Bob Roberts

So what do you guys think about leaving the original ps in a DK cab but running a newer power switcher off the transformer? What are the positives and the negatives? I want to restore a cab that I have and being a gamer and not a purist i was going to put a multicade in the cab. i wanted to leave the original stuff alone in case later down the road a purist took it off my hands or maybe my kids decided to change it back. I do have a couple of questions about whats in there right now #1 what is the cable coming out of the 9P CPU and the 10P CLK called? i need new ones to use the old switcher to power the new one according to what I've read but dont know what im looking for when I'm shopping. #2 What is the 6 strand white cable with different black patterns on it running from the chasis i believe to the game board called? I believe it is for the RGB, ground, and video sync. I think I might need a new one of those also. Thanks for all the Help.
Joel
 
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Isn't the original DK power supply also a switcher, just a Nintendo one?
 
doesnt having a new switcher in the cab make it easier to adjust power levels? i mean compared to the original ps?
 
The 9-pin cable and the 10-pin cable, both, send power from the original power supply to the motherboard. The 6-pin white and black cable carries the video signal from the motherboard to the monitor.

A lot of people run their Nintendo games on modern switchers.....most have no issues, a decent portion of people have issues. Classic Nintendo motherboards are power pigs when it comes to the negative 5VDC line, and this is where issues will arise with modern switchers. I used to use a modern switcher to repair and bench test Nintendo games. I approximated about 40% of motherboards would have issues. No rhyme or reason.....one board set would operate fine.....the next might not.

If you are going to stick a multiboard in the cabinet, this is a moot point.

One other thing (if you're going the multiboard route).....original Nintendo monitors used inverted video. The monitors are slightly modified to accept this. If you've got an original Nintendo monitor inside your cabinet, you're gonna have to work around this to use a multiboard. A lot of the Sanyo monitors shipped with an auxiliary inverter board mounted above the flyback. This was for use with non-Nintendo gamesboards, to get around the video inversion. You're going to need one of these if you don't already have one installed on your chassis. You can also just modify the actual chassis to accept a non-inverted video signal. This all assumes you have a Sanyo monitor......if you have a Sharp monitor, you're gonna have to buy an external video inverter.

Edward
 
Thank you for the info Edward. I do indeed have a Sanyo. The cab I have was converted to play Yie Ar Kung fu so the owner I bought it from flipped the monitor side ways and spliced the monitor cable to the pcb to get a pretty good picture. Would I be able to just run off that same type of splice to run other jamma boards or would I just be looking for trouble doing that? Thanks for the help.
Joel
 
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Thank you for the info Edward. I do indeed have a Sanyo. The cab I have was converted to play Yie Ar Kung fu so the owner I bought it from flipped the monitor side ways and spliced the monitor cable to the pcb to get a pretty good picture. Would I be able to just run off that same type of splice to run other jamma boards or would I just be looking for trouble doing that? Thanks for the help.
Joel

You should be able to run a multiboard the same as the Yie Ar Kung Fu.

Edward
 
can i put quick disconects on the individual video wires and the same on my jamma harrness in order to put different boards in the cab? Do you think doing that would mess with the video signal?
 
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can i put quick disconects on the individual video wires and the same on my jamma harrness in order to put different boards in the cab? Do you think doing that would mess with the video signal?

You just lost me.....the video signal should run from the JAMMA harness, starting at the edge connector that plugs into the motherboard. The other end terminates at a small connector that plugs into the monitor.

I guess I don't understand......if you're swapping JAMMA boards, why the need to mess with the harness?

Edward
 
You just lost me.....the video signal should run from the JAMMA harness, starting at the edge connector that plugs into the motherboard. The other end terminates at a small connector that plugs into the monitor.

I guess I don't understand......if you're swapping JAMMA boards, why the need to mess with the harness?

Edward

I'm sorry I didn't mention this in my earlier post the Yie Ar Kung fu has a dedicated harness which only has 18 pin outs I believe so I would have to change that harness out for a new one. I not sure what their called universal? But you know for a jamma harness that I could basically hook any board to. Thanks sooo much for helping me with this!!
 
The easiest thing would be to purchase a new JAMMA harness and rewire it. Bob Roberts and ArcadeShop, both sell nice ones for under $20.00.

However you approach it....there would be no reason to splice into the video signal wires. JAMMA is 56 pins, so you're gonna have to get another edge connector. The video signal wires will run from this edge connector to the monitor's input connector.

Edward
 
The easiest thing would be to purchase a new JAMMA harness and rewire it. Bob Roberts and ArcadeShop, both sell nice ones for under $20.00.

However you approach it....there would be no reason to splice into the video signal wires. JAMMA is 56 pins, so you're gonna have to get another edge connector. The video signal wires will run from this edge connector to the monitor's input connector.

Edward

How do I post pictures on here? I would like to show you what they did. I don't know if donkey kong had a board that connected directly from the monitor chassis to the CPB or what but they spliced the RGB video sync and ground cables from the white and black ribbon monitor cable to the jamma harness. So there's a molex 6 pin connector at the chassis then a couple feet of the small gauge ribbon cable then a splice of I believe 20 gauge wires from the cable to their respective places on the jamma.
 
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