Tools to have before working on a WPC game

Hand tools: work light, phillips and flat screwdrivers (including right-angle ones), 1/4, 5/16 and 11/32 inch nut drivers, 3/8, 9/16 and 5/8 inch wrenches, inch Allen keys, needle-nose pliers and hemostats. Electronics: alligator jumper leads, soldering iron with 60/40 rosin-core solder, desoldering tool, digital multimeter, logic probe, a crimp tool for Molex pins and an infrared detector card for checking opto LEDs.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part One, Clay Harrell (pinrepair.com)