Solenoid driver layout: 16 multiplexed plus 14 constant
The system drives 16 multiplexed coils and flashers (eight drivers times two banks) and 14 constant-power coils, six of them the special coils. Every solenoid is grounded by a TIP122/TIP102 or a TIP36c.
Systems
Related tips
- Constant power coil drivers Q8-Q13 and Q23-Q30
- The solenoid L/R select relay and transistor Q29
- Testing the legacy special-solenoid circuit at CN18
- Always check the coil diode when a driver transistor has failed
- Finding a coil's driver transistor without a manual
- Special solenoids: switch-fired on CPU Rev 1/2, CPU-fired on Rev 3
- Use the manual's coil/flasher chart to find driver transistors
- A low resistance coil means checking its driver chain too
Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part One, Clay Harrell (pinrepair.com)