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Puuhis79

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Hi,

New to this forum. Problem is with gaelco squash sync, it gives 14khz out...
looking for schematics to this pcb

Thanks

Pete
 
Last edited:
Ill try grounding. I managed to get working unit, so i can scope and compare signals.
I can share those if needed
 
Schematics are in general not available so you have to deal with that.
 
Tried that grounding wire, no help. Still same issues with sync. Scooping continues...
 
Update:

I received working unit,i scoped and traced sync signals. Now they are identical in both boards, still sync is ”lost” (14.7kHz). What i chaged from the first board was sn74ls163 chip, now the sync out is stable 14.7kHz.

Next try will be to make an external sync circuit. More info we i receive the parts.

Still trying to figure it out why my cabinet works with other games (non Gaelco)...
 
Hi,

Still waiting for few chips to make sync cleaner... anyway, Could someone identify sound chip rom type...if someone has take rom-dump from it
 
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