Solenoid driver board: transistor, diode, resistor and connector for each driver
Each driver Qn pairs with diode CRn of the same number; the 330 ohm resistor and connector pins are: Q1 R9 (J1-2 and J2-9), Q2 R6 (J1-3 and J2-4), Q3 R16 (J2-5 and J3-4), Q4 R18 (J1-5), Q5 R10 (J2-10), Q6 R12 (J2-11), Q7 R14 (J2-12), Q8 R20 (J5-10), Q9 R26 (J5-9), Q10 R28 (J5-15), Q11 R32 (J5-14), Q12 R30 (J5-13), Q13 R22 (J5-12), Q14 R24 (J5-11), Q15 R39 (flipper relay), Q16 R34 (J2-6, J3-7 and J5-8), Q17 R42 (J5-7), Q18 R45 (J2-15, J3-9 and J5-3), Q19 R47 (J2-8).
Systems
Related tips
- Test solenoid driver transistors with the game off
- Test the 1N4004 diode behind a driver transistor
- AS-2518-16 and AS-2518-22 solenoid driver boards interchange
- Fire a coil by grounding its driver transistor tab (game on)
- Test the CA3081 pre-driver array
- Solenoid driver board J3 pin functions
- Check the wire from a coil back to the solenoid driver board
- The solenoid driver board also carries the 190 V display supply
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part Three, Clay Harrell (pinrepair.com)