Double-solder the CPU board male header pins
Steps
- Desolder the 40 male pins on the CPU solder side.
- With the connector over the bench edge, tap the pins down with a rubber mallet until about 1/2" sticks out the bottom.
- Push them back up to their normal height, leaving the plastic strip higher on the pins.
- Solder each pin to its pad on the component side under the strip, and on the solder side.
- Push the strip back down.
Systems
Related tips
- Making new interboard male pins long enough
- Replace the 40-pin interboard female connector
- Replace CPU board power connector 1J2
- Always replace the driver board's 40-pin female interconnector
- Freezes mid-game and blows solenoid fuse F2: clean and reseat the 40-pin interconnect
- Damage after the black and white plugs were swapped
- Boards pass on the bench with Leon's code but the game is dead
- Board work that cures most intermittent faults
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)