Double Dragon preservation & conversion

Arcade Collecting > Restorations & repair

<< < (4/11) > >>

smalltownguy:
Yeah, the more I think about this, the more I might want to keep the DD as is. I got it for a great price ($100) and if I can get the boards working again, I'd like to keep it. The control panel is in decent shape, the controls are working, and the monitor is nice, bright, and clean.

Perhaps I will end up building a new cab after all. Meh. In the mean time, I will start cleaning up the PCB to see if I can get it to work.

RayB:
Measure the voltage. The +5v being most important. If it's lower than that, adjust it up to +5v.
I doubt it's that simple, but its a start.

smalltownguy:
Okay, I think I can do that. So really the only measuring device at my immediate disposal is an analog multimeter. Using that, I see over 15 volts on the 5v line, and over 30 on the 12 volt? Is that right? It can't be. I should probably get my hands on a digital meter.

When a power supply like this is horked, will it output TOO much voltage? I'd have figured that the opposite would be the case: bad PS, no juice.

Cycling the power gives me random garbled images like the one shown above, with random game sounds playing.

I have a buddy with a working game that I could probably borrow his PS to test with my board. I'll report back with what I see.

smalltownguy:
Okay, so I'm an idiot. I finally figured out how to read my multimeter. I had to test it on my computer's power supply to understand it. I'm fairly confident that the 12v and 5v lines are pretty close to 12 and 5.

I noticed that there are capacitors on the game PCB's. Is it worth trying to replace them, or is there some other method of attack I should employ?

Remember, I can get random game sounds and garbled picture to come up each time I cycle the power.

smalltownguy:
I got a little closer look at the PCB today. When I was cleaning it last week, I noticed one little area where there was some gunk on the board, most likely rodent pee or something like that. There was a little bit of corrosion. Closer inspection after cleaning revealed that some of the traces are damaged. Here's a pic:

I suppose the only way to really fix this is to jumper the traces with wire? I've never done it, but I think I could do it.

Am I making a mountain out of a molehill here? Or is this a legitimate concern?

Navigation

 Message Index

Go to full version