Electronics tools needed for board work
Board work needs alligator clip leads, a soldering iron with 60/40 rosin-core solder, a desoldering tool, a digital multimeter and a logic probe. Crimp connector pins with a proper hand tool such as Molex WHT-1921 (11-01-0015), Molex 63811-1000 or Amp 725.
Systems
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part One, Clay Harrell (pinrepair.com)