Is my Power Supply bad on my Dirt Dash racer??

BRI71

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I have a Namco Dirt Dash sitdown racer. With Namco System 22 boardset.

History:
The game was working 2 years ago.

The monitor (Neotec 2515C) was pulled-out for use in a different cabinet.

Another monitor was installed. It was miswired during install, and that monitor was fried inside the Dirt Dash machine.

Fuse at On/Off switch was replaced, and the game booted and ran, but played blind.

I reinstalled the original Monitor yesterday. It is a good/working monitor. The 3 wire output from my power supply is supposed to power monitor, and the fluorescent light behind marquee. Niether the monitor or the lamp are getting power. The 3 wires are Ground/AC hot/AC neg.

The boards, etc get power from different outputs on my P/S. and they power-up and run fine.

Is my power supply bad, even though everything else powers up, except mon and light??

I assume something took a hit when the other monitor was installed.


Brian S
 
Which make/model power supply do you have in the machine?

Does the monitor and marquee light power come directly out of that same power supply "box"?
(might be a separate fuse for that portion of the AC power)

BTW - You have a Namco System SUPER 22 (a little bit different from the regular System 22)
 
HAPP part # 80-0015-00

3 wires go directly from this P/S, to monitor and marquee.

AND, now that I think about it...there is a 2" by 2" plastic box near monitor that the 3 wires gos thru...fuse in there??? unfortunately I cannot check until later today.
 
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AND, now that I think about it...there is a 2" by 2" plastic box near monitor that the 3 wires gos thru...fuse in there??? unfortunately I cannot check until later today.

I would definitely check there for fuses.

Otherwise the AC side of things are pretty straight forward as far as the power supply goes.
Basically if the game is playing (blind) then the AC output should be working also.
Of course throwing a multimeter on the AC output would absolutely verify this.
 
no fuses found.

tested outputs, had no voltage. also the cooling fan in the p/s is dead.

I found 1 place that sells the supply online around $50
 
so now I am back to square one... I tried another working power supply and still get no monitor or marquee lights. Hmmmmmm???
 
You have a bad connection (or a blown fuse) between the AC terminals on the power supply and the marquee/monitor, I am unsure why you would think the power supply was at fault when the game was running...
 
I am unsure why you would think the power supply was at fault when the game was running...

Because the AC for those things runs "through" that particular style power supply.
So the logic is thought to be a problem in there.

But I agree, there's a bad connection or separate fuse situation for the AC side of things leading to the monitor and marquee somewhere if the game is booting up fine.

Some of those style power supplies have a little circuit breaker on the side, but I don't recall if that is for the entire power supply or just the DC or AC side.
I thought I had one of those Happ power supplies handy to glance at, but I guess those are actually in machines I can't get to at the moment. I have a couple that are similar to look at, but they don't have the power switch built in.

Your best bet is to use a meter and follow the AC lines through and through until you find the missing voltage.

Does your machine have a power switch on the power supply AND on the cabinet ?
 
There is an On/Off button and a circuit breaker on the supply. Also a power switch on back of cabinet.

I have 2 working power supplies, and am in process of tracing wires abd testing with meter.

thanks
 
I now have 122 v running to monitor and marquee. the fluorescent light is on/working. I can hear the monitor turn on, but no picture on screen. If I adjust brightness, contrast, etc then it "sounds" like it would when making adjustemnts on a working monitor.

The monitor was working in a different cabinet the same day I moved it into Dirt Dash.

What am I missing here?? hehe

*UPDATE:
Monitor confirmed "ON" but no game on screen.
This narrows my problem to the 5-wire connection (R/G/B/pos sync/neg sync) from monitor to System 22 board. I see nothing out-of-the ordinary with the wiring. I am using the original harness, so all wire colors match-up.
I wonder if the PCB got damaged when the other monitor was fried when connected to this machine.

Brian
 
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How did I fix that?
My power supply was working the whole time, but seeing it's cooling fan dead, no images on monitor and no light, I assumed the supply was dead.

my marquee light had a bad bulb connection, now it works. Monitor turns-on but not showing the game yet.
 
I connected the game to a VGA converter and tried my LCD monitor (fool-proof test for me). I am getting no video signal from the game board :(
 
Agreed! I will have to pull the PCB cage out of the cab one of these days and take a closer look at it...Dirt Dash is a great racer, but it needs some TLC. The steering/gas/brake pots need to be replaced, and the forced-feedback is extremely weak.
 
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