Dead Ms. Pacman

[dreich]

So i posted on here a couple of moths ago that i got a Ms. Pacman.

I managed to get it working with a total rebuild for the GO7 monitor and a new edge connector as well as cleaning the roms.

Today i was dialing the monitor in, but was having an issue keeping the game in test as there was no switch and the wires
were cut off.  So i decided to wire the game into test using the wires that where there.  The game would go into test but would not stay on the grid screen
for adjusting the monitor.  After i tried resetting the game a few times it went dead on me.   The five volts now reads one volt so my guess is i simply blew a cap
on the pcb.  My question is what are the chances i hurt the Z80 or the roms, and does anyone have a Ms pac coin door harness and or test they would want to part with
and has anyone had a similar problem in the past.

[iankellogg]

start with checking the fuses at the bottom of the cab.

If that checks out. Make sure you are getting 7VAC going to the game PCB. after that check the big capacitors for DC voltage, i think around 8V or so. If that is good then check the voltage regulator. which is that transistor mounted to a heatsink. If you get 8V on the one side, and 0V on the other. the transistor might be dead.

[dreich]

So finally getting back to this i checked the fuses and the bottom of the cab and they tested ok.

I then reseated all the fuses and the game worked so new fuse blocks and the game is now 100% working.

Thanks for the help!

[P-feif]

If that's the case you might want to buy the updated fuse blocks and install them. Pacman and Ms. Pacman have chronic problems with them (and a few other things). It's not worth keeping the old ones, they will just act up again on day. 

[dreich]

Already done thanks for the advice.
 My Galaxian will be getting new fuse blocks as well to fix at least one of its problems.


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[oscar-hernandez1983]

Glad you fix your problem ms. Pacman its a nice piece of collection