Ground mod step 2: repin the power supply to CPU power cable

Steps

• Replace every pin at both ends of the cable from power supply J2 to CPU A1-J1.
• On 80/80A, swap the round header pins at power supply J2 for Molex .156" square header pins 26-48-1125 and fit a new 6-pin 09-50-3121 housing with Trifurcon 08-52-0113 pins.
• On all games, fit the five A1-J1 wires with new Molex 08-52-0072 pins; the old CPU-end housing can be reused.

Systems

• Gottlieb System 80
• Gottlieb System 80A
• Gottlieb System 80B

Related tips

• Connector stock for burnt-connector repairs
• .156 in header, housing and peg part numbers
• Burnt +5 V output connector on the 80B power supply
• Fit crimp pins into an old IDC housing
• Replace CPU board power connector 1J2
• Ground mod step 4: double the +5 V and ground pins between CPU and driver boards
• Burnt GI connectors on the power supply (System 7, Hot Tip, Lucky Seven)
• Replace the 3J6 logic power connector

Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part One, Clay Harrell (pinrepair.com)