Baby Pacman Vidiot board Schematic Help

Bodie

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I have a baby Pacman that I think has a bad trace.
I'm only am getting two flashes on the Vidiot board Green Led.
That Tells me EPROM U12 has a problem. I think from the schematic U9, U10, U11, & U12 are all Wired in line.
If that is correct each chip pin out of the 14 pins in the same location on each chip should have continuity.

I'm not an expert with schematics and wondered if someone who is could verify this.

Thanks in advance.
 
baby pac vidiot...

Always eliminate the simple things first:

1. triple check all connections. baby-pacs are finicky and often have battery acid damage on the harness, check and reflow the connector solder joints too

2. re-seat the socketed chips on the vidiot board

This all of course assumes you already took care of the battery on the mpu...

good luck!
 
Baby Pacman

That has all been done, no acid damage. Its either the Eprom or a bad trace. I could find the bad trace easy if the four chips are wired in series. If one leg of the chip doesn't have continuety then I found my problem. I just don't know if I'm reading the schematics correctly.
 
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