Tips
Game Plan Switch Matrix Chart
Gottlieb Drop Target Removal / Installation Quick Guide (EM and early System 1)
Gottlieb Drop Target Removal / Installation Quick Guide (later System 1, System 80/80A, and most earlier System 80B)
Ni-Wumpf System 1 CPU Reset Circuit Modification
Gottlieb Free Play Modification
Gottlieb Sound Card Pin Connections
Gottlieb System 80B Ground Modifications
Gottlieb System 80/80A/80B Switch Assignments Not Listed on Switch Matrix Page
Gottlieb Roto Unit Adjustment
Bally Sound Board Pin Connections
Bally CPU Cheat Sheet (Pinouts for CPU Board in PDF)
Bally Rec Board Cheat Sheet (Pinouts for Rectifier Board in PDF)
Stern (Classic) Service Bulletin 15 - Display Repair Procedures (PDF)
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