Electronic spares worth keeping for System 11 boards
Transistors TIP102, TIP42 and TIP36c; diodes 1N4004 and 1N4148; 2.2 mfd 250 V non-polarized EOS capacitors; 35 A 200 V bridge rectifiers (MB352, Williams 5100-09690 with wire leads, and the lug version 5100-09418); an 18,000 mfd 20 V +5 V filter capacitor; 39k 1-2 W flameproof resistors (these often fail on the power supply); 5 ohm 10 W flasher resistors; 330 ohm 7 W resistors for the under-playfield flasher boards on Fire! and earlier; 6808 CPU chips (they replace the 6802 of early boards); 6821 PIAs (six on the CPU board); 74LS244 and 7408 chips; a 2016/6116/NTE2128 2k x 8 static RAM; and .156 in connector pins and housings.
Systems
Related tips
- Spare diodes for coils and switches
- System 9: is the sound fault on the CPU board or the speech board?
- Replace SE9302 drivers with TIP102, and renew the parts around them
- How a coil or flasher is switched: PIA to TTL to pre-driver to driver
- A coil or flasher comes on and stays on at power-up
- CPU still will not boot after the basics
- Flipper stuck up with power on (Playboy and later)
- Test each lamp column driver with a test lamp
Source: Repairing Williams System 11 Pinball 1986 to 1990, Deel 1, Clay Harrell (pinrepair.com)