CPU board flipper relay RY1

CPU relay RY1 turns the flippers on when a game starts, driven by 2N4401 Q80. It is a 6 V DC 5 A four-pole relay with four SPST contacts wired as two pairs, and ten solder points. It is the most reliable of the three backbox relays.

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3
• Data East/Sega CPU Version 3b

Related tips

• CPU flipper enable relay RY1
• Flippers never work: flipper relay RY1 not pulling in
• Flippers work for a few minutes then stop
• Bank select relay and CPU transistor Q29
• Other CPU jumpers and what they set
• Bench-testing a CPU board on +5 V
• CPU boards are only downward compatible
• CPU EPROM jumpers J4 and J5

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part One, Clay Harrell (pinrepair.com)