Resolder board header pins properly
Steps
- Remove all the old solder from each header joint first; reflowed old solder often leaves a ring that never bonds to the pin.
- Solder with fresh rosin-core solder.
- Check that no neighbouring pins are bridged.
Systems
Related tips
- Resolder the driver board header pins
- Resolder and inspect the driver board header pins
- Double-solder the CPU board male header pins
- Cracked header pin joints on the power supply
- Replace the 40-pin interboard female connector
- Remove terminal pins from a crimp housing
- Always replace the driver board's 40-pin female interconnector
- Reusing an IDC housing needs 08-52-0072 pins
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)