Transistors, diodes and chips to keep for CPU and driver repairs

Useful stock: TIP102, TIP42, TIP36c, TIP32c, 2N3906, 2N3904, 2N4401 and 2N5060 transistors; IRL540 MOSFETs; 1N4004 diodes; a 35 A 200 V lug bridge (MB3502, Stern 112-5000-00); 6821 PIAs (the CPU board has six); a 6802 or 6808 CPU; 7402, 7408 and 74LS273 logic; and a 28-pin 2064C or 6264 RAM (early boards use the 24-pin 6116).

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Related tips

• Which logic chips drive which solenoid transistor pairs
• CPU board PIA positions and jobs
• Test EPROM flash codes: which chip failed
• CPU still will not boot after the basics
• One PIA output does not toggle under the test EPROM
• Test program does not run at all
• CPU chip types: 6800 on System 3/4, 6802 or 6808 on System 6/7
• CPU locks up as soon as the driver board is connected

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part One, Clay Harrell (pinrepair.com)