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Multiple Switch Row Issues - TAF
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Question
Ace1942
Howdy,
Pinball noob back on my steep learning curve journey.
My TAF has developed multiple switch issues, I’ve done some research and testing and have a couple of questions And would appreciate some guidance.
The Background
It has had an intermittent ground short row 8 for a little while,
I did a jumper test for this on the CPU with J206 and J208 removed. Switch edge test, all closed with a beep but with one exception switch88 (not used) closed but didn’t beep, the no beep may not be important but I mention it for completeness.
So from all the sources this tells me it’s a playfield short and not the CPU being faulty. I haven’t tracked down the short and not sure if continued playing in this state could have caused the next set of faults.
A ground short on row 6 along with check switches bookcase opto 1, 2 and 3 (53, 54, 55), Thing up opto (85) and thing limit opto (?)
Switch edge test up with J206 and J208 removed gave the following, so this time the CPU is faulty.
Close inspection of the CPU shows acid damage and previous repairs.
At this point I decided replace instead of repair and have a PinSound RocketCPU on its way.
The Questions
I assume logically the new CPU will resolve the second set of faults with row 6 and opto’s
But is it possible the row 8 ground short could have caused the second set of faults and therefore I risk damage to the new CPU with it still present. I really don’t want to blow up my shiny new expensive board. I do plan on tracking down the row 8 short but may take me some time (remember the learning curve),
so can I run the machine relatively care free until I resolve the short or do I need to proceed with caution.
Is it also recommend to replace all the IDC connectors with the new board being installed.
Or is this only relevant when replacing failed IDC connectors you should replace the header pins on the boards at the same time.
thanks in advance
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