CPU flipper enable relay RY1
RY1 on the CPU board switches the flipper coil grounds and is energized only in play (and in diagnostics on Frankenstein and earlier; not on Baywatch and later). It is a 6 V DC, 5 A four-pole relay, wired as two pairs for up to two sets of flippers. It is driven by Q80 (2N4401), fed through the 7402s at 12A/12B, 7406s at 12E/12F, a 555 timer at 1C and PIA 11D. Q80 is the usual failure.
Systems
Related tips
- Flippers never work: flipper relay RY1 not pulling in
- CPU board flipper relay RY1
- Solenoid driver transistor positions on the CPU and PPB boards
- Three-stage drive for 50 V coils
- Flash lamp stuck on and melting plastics on L/R reversed games
- Quick test for shorted TIP122/TIP102 drivers
- 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
Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Two, Clay Harrell (pinrepair.com)