System 11 CPU/driver board transistor locations
Coils 1-8: Q33, Q25, Q32, Q24, Q31, Q23, Q30, Q22. Coils 9-16: Q17, Q9, Q16, Q8, Q15, Q7, Q14, Q6. Special solenoids 1-6: Q75, Q71, Q73, Q69, Q77, Q79. Lamp columns 1-8 are TIP42s at Q66 down to Q52 (even numbers); lamp rows 1-8 are TIP122s at Q80-Q87.
Systems
Related tips
- How the CPU-controlled lamp matrix is wired
- CPU and driver board transistors by position
- System 11 coil outputs
- Sling or bumper locks on at power-up (System 11)
- Solenoid driver transistor positions on the CPU and PPB boards
- Where the TIP122 drivers are on the CPU board
- Lamp and switch matrix transistor positions on the CPU board
- 50 V coils use PPB TIP36c transistors, pre-driven from the CPU board
Source: Pinball Machines: How They Work & Troubleshooting, Norbert Snicer