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T2 intermittent errors - Adelaide Tech?


g5k

Question

Hey guys, wondering if anyone can point us to a recommended tech to use in Adelaide that comes out on site. We are getting some intermittent errors and have exhausted our troubleshooting. Have replaced a switch and diode that seemed to be the culprit based on switch tests and briefly improved but has now regressed. The errors are happening in the shooter lane, that switch isn't always triggering then the 5 targets that you aim for on the skill shot and from the cannon aren't always registering (but we suspect that is because the machine needs to know the ball has been launched and it doesn't know ). Have read up on switch matrix and tried to work out what else might be contributing to the issues but at the point where it might be best for someone who knows their stuff to solve it. Cheers
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U20 pin 12 (Darlington Transistor) on the CPU board is common to the switches mentioned (Target 1-5, Ball Popper, Drop Target, Shooter). As is connector J207 pin 7, grey and violet wire.

 

I would be looking at the connector pin and wiring first and then U20.

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