Common transistors, diodes and chips to stock

Transistors: TIP102 (coil drivers), TIP107 (lamp columns), TIP36C (high-power coils), 2N5401 (coil pre-driver, displays), 2N4403 (Fliptronics), 2N5551, 2N3904, MJE15030 and MJE15031 (displays). Diodes: 1N4004 (coils, switches, lamps), 1N4148 or 1N914 (CPU), P600D or 6A4 (WPC-95 rectifiers), zeners 1N4742, 1N4758 and 1N4759 (displays). Chips: ULN2803, LM339, 74LS240, 74LS244, 74LS374; regulator LM323 on WPC-89 and WPC-S driver boards.

Systems

• WPC Alpha-Numeric
• WPC Dot Matrix
• WPC Fliptronics
• WPC DCS
• WPC-Security (WPC-S)
• WPC-95

Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part One, Clay Harrell (pinrepair.com)