Replace the 3J6 logic power connector
Steps
- Remove the 15-pin 3J6 header from the power supply board and fit new .156" header pins.
- Replace the pins in the mating housing with new .156" Trifurcon crimp pins.
- Do this before the first power-up, whatever the connector looks like.
Systems
Related tips
- Replace CPU board power connector 1J2
- Burnt GI connectors on the power supply (System 7, Hot Tip, Lucky Seven)
- Burnt +5 V output connector on the 80B power supply
- Connector stock for burnt-connector repairs
- Use crimp-on pins, ideally trifurcon, when re-pinning connectors
- Ground mod step 2: repin the power supply to CPU power cable
- Molex crimp pin part numbers
- Burnt 3J1 square power input connector
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part One, Clay Harrell (pinrepair.com)