Author Topic: Switch matrix prob  (Read 3307 times)

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Offline MartyJ

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Re: Switch matrix prob
« Reply #30 on: March 14, 2009, 06:28:38 PM »
OK yes, Pin 3??   ^&^

Pin 10 is +12.

Tested again, so pin 10 (U20) good 12v same as U18 & U19.  They all buzz out together so must share the same rail.

Jumpered PIN10 U20 to pin 3 U16.

All good.

Just letting run for a while to ensure no phantoms and will test all playfield switches again.

I suspect the cleaning and movement in / out may have caused issues where the batt damage had been.  I am still going to put a Rottendog board in.  I think this will be a better option for the long term.

Thanks MM,   ^^^

PS.  Even after you explained everything I cannot read that schematic.  I will keep trying though..