Spare parts worth keeping for System 80 repairs
Keep Molex crimp pins and housings for the .156" connectors, a crimper and pin extractor, the common transistors (2N6057/2N6059, TIP102, 2N5550/2N5551, 2N4401, 2N4403, MPS-U45, MPS-A13, 2N3055, TIP31C, 2N5879), the logic chips (7400, 7404, 7448, 7432, 7474, 74LS16, 74121, 74175, 6532), a 723 regulator, UDN6118 display drivers, the power supply zeners, coil and switch diodes, and a 10,000 mfd 20 V filter capacitor. A fiberglass pencil helps clear battery corrosion.
Systems
Source: Repairing & Upgrading Gottlieb System 80 Pinballs from 1980 to 1989, Part One, Clay Harrell (pinrepair.com)