Cybernaut can have a -35, 6802 or 6803 boardset

Most Cybernaut games shipped with the older Bally -35 MPU board, a few with a 6803 board, and a very few with a 6802 MPU board (A080-19638-D000) that looks almost like a -35. For the -35 and 6802 boards use the -35 repair information, including the LED flash codes.

Systems

• Bally 6803

Related tips

• What is on the 6803 CPU board
• Electronic spares for 6803 board repair
• Bench-test a CPU board with the 6803 test EPROM
• Power a 6803 CPU board on the bench with a PC supply
• Check the 6803 clock at U1 pins 2 and 3
• Find a bad 6803 or a shorted bus line
• CPU board landmarks: battery, LED, relay and ROMs
• CPU board test points

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