7-digit display driver boards use discrete parts

The 7-digit display driver board on the numeric 6803 games is built from discrete components; there are no UDN7180 driver chips to replace.

Systems

• Bally 6803

Games

• Beat the Clock
• Eight Ball Champ
• Lady Luck

Related tips

• Early 6803 games with 7-digit numeric displays
• Score displays dead or dim: high-voltage section parts
• Turn the display voltage down to 170 V
• Rebuild the high-voltage display supply
• One segment always on and the other display corrupted: replace the 74HC373

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