Arcade Collecting > Miscellaneous Arcade Talk
Tech: Atari Cloak & Dagger
Rocky:
I cleaned things up a bit, reseated chips, cleaned chip legs...
I did a check on the main CPU
Witchboard:
Well, if you're already doing logic probing, then you're already beyond any help I can offer. ;)
ChadTower:
Have you started at the beginning? What I mean by that is, did you check the power supply? Did you check the filter capacitor? Any of those things could be caused by something simple like a bad filter cap.
Rocky:
I'm not using the Atari AR board. I'm using a JAMMA adapter. The voltages are all good. I'm not sure what filter capaciter you're talking about. Is it on the game board or the power board?
Does anyone know what output the clock crystals should be giving?
ChadTower:
The filter capacitor is the big cap in any power supply. The Atari ones are well known to usually need replacing.
If you're working with an Atari board and a Jamma adapter you're adding a bunch of complexity there that's going to make it a total PIA to diagnose. You're going to have to check ALL of the input pins on that adapter to make sure that the expected voltages (AND polarities) match what the board expects.
If there is a way for you to do this with the original power supply, do it.
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