Self-tests 1 to 3: memory and lamps
Test 1 checks memory. Test 2 flashes every controlled lamp together while the flashers fire one after another. Test 3 lights single lamps, 00 to B7 (96 in all): right flipper chooses, credit button lights it.
Systems
Related tips
Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)