I've done a quick search, and could not find anything about testing outside of the machine. I want to take a spare transformer/rectifier assembly and hook it to an SDB to verify/repair the power supply sections. (I already have a tester for the solenoids and flippers, and have repaired those sections.) My proposal is to feed the power supply with 115VAC at pins A2J2 6 & 7, run a special built cable from A2J3 5, 8, 16, & 17 to SDB A3J3 3, 6, 10 & 12, and run a jumper from the chassis of the transformer/rectifier assembly (A2) to the ground test point on the SDB (A3).
A2J3 - 8 to A3J3 - 12
A2J3 - 16 to A3J3 - 10
A2J3 - 5 to A3J3 - 6
A2J3 - 17 to A3J3 - 3
Once completed, I should be able to test for the 5 VDC and the 190 VDC. Since I have nearly a dozen SDBs to test/repair, I am thinking this would be a lot easier than leaning into a machine. Thoughts?