Spare diodes, capacitors and other parts for System 1
Keep 1N4004 coil diodes and 1N270 switch diodes (1N914 or 1N4148 also work), a 6800 to 10,000 mfd 16 V or higher filter capacitor for the power supply, 35 amp bridge rectifiers with lug terminals (bottom panel), 1K trimmer pots for the power supply and 9.1 ohm 1 watt resistors for the driver board 2N3055.
Systems
Related tips
- The two System 1 transformers
- What is on the System 1 bottom panel
- How power reaches a System 1 game
- System 1 power supply outputs
- Replacing power supply filter capacitor C1
- Acceptable System 1 supply readings
- The mandatory System 1 ground modifications
- Quick checks on the similar System 1 power supply
Source: Gottlieb System 1 Pinball Repair from 1977 to 1980, Clay Harrell (pinrepair.com)