Quoted from KSUWildcatFan:No middle or right pop using this mpu in my Roy cab. Outhole worked fine as did all four drops, both slings, and the left pop.
I'm a bit afraid to try my good mpu in the Circa/Hearts Spades configuration, just because of how delicate I know these mpus can be. That said, at least I know now that this mpu is not in fact 100% working as I thought it was.
Test and credit button press can seem a little strange to get to the next test. You need to press an hold the credit button until the display shows the next test number then let go. It only checks for a button press at the end of each cycle, not during the cycle.
Start test using test button, advance to display test using credit button, advance to switch open and closed tests using test button (only with no closed switches), then all subsequent tests (lamps, coil drivers and burn-in mode) are using test button held until end of each cycle for that test. Power cycle at any point to end testing.
You can quickly swap IC 8 with one of the other PIA's (not RRIOT's IC3,5,6) to see if the fault changes and is related to the PIA or the driver circuitry.
If you need to troubleshoot the coil driver section further here is my schematic for that section from my Repro board, the part numbers should match your original board.
IC8 Coil Drivers (resized).jpg
Make sure to Check J5 pcb socket and harness connector pins are mating properly they can become open if not firmly plugged in or sockets pins have opened up over time from multiple unplugging/plugging in.
As I already mentioned what is call a pop or sling shot gets swapped for some games (to change up the game play). I do not have the wiring info for Circa 1933 so unable to tell you if they are swapped around.