Bagman - shorted

Tornadoboy

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I've got a Bagman PCB that appears shorted in some manner and shuts down power supplies, I noticed the following mods in the attached photos and I was wondering what they are, if they're factory and if necessary or I should try to undo them?
 

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Last edited:
Here is mine.


Looks like mine is a different board but maybe helpful ?
 
Here is mine.


Looks like mine is a different board but maybe helpful ?
Interesting, mine is different and has more large caps near the edge connector.
 
Was that board completely socketed from the Factory? 😲

If not, I would start with the prior work....
I thought that was incredible.

I would do a diode/continuity test on all those caps by the edge. maybe your short is there. otherwise I would look at that bottlecap apparatus in the corner.
 
I suspect that the big caps and the bottle cap and presence of diodes are used to convert AC current to DC on the board, similar to Pac Man or Galaxian boards. It looks like there are a couple of diodes missing that would be responsible for the voltage rectification. So, either those diodes have been cut leading to a short circuit, or someone has tried to convert the board to DC input for use with a regular DC switching power supply (maybe some of those jumpers on the back are part of that work). I would suspect any of that work as the culprit here.

First thing is to get rid of the short. Start by testing if there is a hard short on the 5v line by checking continuity on any of the normal ttl chips. For a 14 pin chip, pins 7 (GND) and pins 14 (+5v) should not be shorted (0 ohms resistance). If they are shorted, then start removing those jumpers on the back and see if that short goes away.
 
I believe this is the French version Le Bagnard if that makes any difference, though I think that's just a ROM swap and I want to try to convert it to Pickin eventually anyway.

I hadn't noticed the fact that EVERYTHING is socketed, weird. I guess the manufacturer was short on parts and wanted it to be able to be assembled it in a hurry once they came in.
 
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