Self-test 9: aux driver board

On games with the aux driver board, test 9 fires its eight extra flash lamps (0 to 7). After the last test the button wraps back to the memory test; the coin door slam switch leaves test mode.

Systems

• Gottlieb System 3

Related tips

• Spare MosFETs for the driver boards
• The A11 auxiliary driver board
• Only logic-level (L) MosFETs work on the driver board
• Diode-testing the 12N10L/IRL530 MosFETs

Source: Repairing Gottlieb System 3 Electronic Pinball Games from 1989 to 1996, Clay Harrell (pinrepair.com)