TECH: System11b No coin door / coin up, service swith action!.

arcadecup

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TECH: System11b No coin door / coin up, service swith action!.

Working on a whirlwind. I hardly have any log time on pinballs as im a monitor guy for the video arcade scene. Seems to have multiple problems however my main concern is getting it to coin up for now.

Symptoms:
No coin up, no coin door action, no voltage read across the coin up switchs / coin door area.
Garbled screen digit display or screen blank. 100v intermittent. restored 100v.
r1 open, changed caps c7, c8, c9, c12 & c2.. 100v always holds good now however still garbled digits display.

Still no coin up. wires are good up to interconnect board and cpu.

still reads the same across cpu boards pins wht/blue & grn/brn wire posts.. pin outs that goto the coin switch coming from the cpu board. I had the harness unplugged from the coin door also no change on cpu board read.

Before I tare the cpu board out is there anything I could be missing?

I did a quick test of q45 quickly which is tied to switch col grn/brn & it tetsted ok with diode check.

thanks hopefully someone has some insight!
cheers,
 
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