Zaxxon Machine.. runs but keeps reset looping

[STEVESPEEZE]

I do a ram/rom test and it says ok..
you can see game displayed and running on screen... sound sounds like its resetting constantly.
Any idea?  i can get a vid of what its doing.

[lesoleil70]

http://www.arcade-museum.com/manuals-videogames/Z/Zaxxon.pdf

try p 28

[STEVESPEEZE]

try what ?

[knaagi]

Did you watch John´s videos? Maybe it´s just a connectivity problem with the edge connector.

[iankellogg]

Try the edge connector. Check board for bad caps (especially on input power). Use DMM or logic probe to see if chip is Watchdog resetting.

[STEVESPEEZE]

oo ok

[John's Arcade]

I do a ram/rom test and it says ok..
you can see game displayed and running on screen... sound sounds like its resetting constantly.
Any idea?  i can get a vid of what its doing.

First things first...

Check the voltage. You need to make sure you have +5V.

Here's the Zaxxon pinout:

http://www.mikesarcade.com/cgi-bin/spies.cgi?action=url&type=pinout&page=Zaxxon.txt

you need to put your DMM probes on A + C or 1 + 3 on the edge connector and see if you get +5V

[STEVESPEEZE]

yeah cuz the video is not resetting , it just sounds like the sound is looping