Expected LED-strip results on lamp headers J10-J13

During the driver test every LED on J10, J11, J12 and J13 should light, except the key position (pin 5 on J10-J12, pin 9 on J13). During the basic test none should light except J10 pins 1, 2, 7 and 16, which blink.

Systems

• Bally 6803

Related tips

• Expected LED-strip results on coil headers J6-J9
• How the CPU keeps lamp phases in step
• Lamp driver SCRs on the CPU board
• How 6803 feature lamps share SCR drivers
• Some feature lamps out after the backbox was lowered
• Lamp driver SCR blew apart with a crack
• Expected CPU LED flashes by game
• Coil output LED solid on or never blinks

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