Expected LED-strip results on coil headers J6-J9

J6: 1 and 7 blink in the basic test, 2-5 in the driver test, 6 never. J7: 3 and 4 basic, 1 and 2 driver, 5-8 never. J8: 1 and 5 basic, 2, 4, 6 and 7 driver, 3 never. J9: 9 and 10 basic, 1-4, 6-8 and 11 driver, 5 never with W8 fitted (with W9 instead, 9 does not blink in the basic test).

Systems

• Bally 6803

Related tips

• Expected LED-strip results on lamp headers J10-J13
• Fire a coil by grounding its driver tab
• How 6803 flash lamps are multiplexed
• Expected CPU LED flashes by game
• Make an LED tester for lamp and coil outputs
• Eight-flash LED code meanings
• Nine-flash LED code meanings
• CPU board landmarks: battery, LED, relay and ROMs

Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)