Help Wiring - Namco - Class of 81 Switching Power Supply Conversion

thebred

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Help Wiring - Namco - Class of 81 Switching Power Supply Conversion

From everything I've looked at so far, this power supply is the root of the issues and I'd like to convert the oem power supply to a switcher.

Has anyone done this? I can't find a schematic on the 81 reunion, and this power supply 'swap' doesn't seem as straightforward as most. I've attached a pic of the current supply and I'm planning to hopefully convert to a switcher.

Any help or guidance on making this a smooth swap is very much appreciated.
 

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Just fyi, the existing supply is a switcher.

Not a powerful robust one, but still a switcher.

I have one of these as well (home no coin cabaret) and bought the caps to change out the cheap caps in the existing supply in mine.

I do believe that the wiring the comes off of that supply is red=+5V, black=GND, and orange=+12V.

I haven't looked at mine lately to see if it has or uses a -5V or -12V connection at all.
 
That looks like the original.... If purchase a new replacement to the original, I would change out the cheap caps for quality caps.... chances are the caps in that replacement are cheap just like on the original.

The amount of electronic wasteland material created by cheap capacitors is staggering.

I still have about 4-5 LCD monitors I have to order caps for and re-do. Common failure item in those.

/Rant on

Corporate America probably loves it anyway, as it perpetuates the the disposable nature that their bottom line must like so much.... it's broken, time to buy a new one. Their greed to save $1 or $2 (if that) on using top notch quality caps vs crap crade caps pads their bottom line over what is best for the consumer and the environment.

/Rant off

I'd put the money towards the arcadeshop kit, unless 100% originality is what you desire.

Hoping caps are the source of my problems on my 20th reunion.... I have strange graphics artifacts that come and go (mostly there when the system is not fully warmed up). Going to do the caps in the power supply, monitor, and maybe even the few electrolytics on the PCB.

Best of luck with yours.
 
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