Use crimped Trifurcon pins, not IDC, when replacing connectors

IDC connectors pierce the insulation and are fine on the assembly line but fail with age. Replace burnt plugs with crimp-on pins using a proper crimp tool, preferably .156 inch Trifurcon pins, whose three wipers grip the header better. Buy loose pins, tin plated (phosphor bronze is best), never gold.

Systems

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

Related tips

• Two wires on one GI pin
• CPU board switch connectors
• How WPC connector and fuse numbers work
• Repair a burnt GI connector on the driver board
• Check the AC power input connectors too
• Lamp matrix connectors on the driver board
• Replacement .100" Molex parts for the CPU switch connectors
• Lamp board plug works for a few minutes then cuts out: cracked header solder

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