Get the game manual before working on a 6803 game
The 6803 adjustments and audits are numbered entries with no names on the display, so diagnosing or setting up one of these games is practically impossible without that game's own manual. Find one before you start.
Systems
Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)