WWF Royal Rumble and later: no coils work with the coin door open

From WWF Royal Rumble on, a coin door interlock switch cuts the +32 V and +50 V coil supplies straight from the transformer whenever the door is open. Close the door before testing any coil, or nothing will fire. The 9 V flipper hold supply is not interrupted, so a flipper already held up stays energized if the door opens.

The interlock reduces the chance of shorting coil voltage under the playfield, but the 9 V flipper hold and lamp supplies stay live.

Systems

• Data East/Sega CPU Version 3b

Games

• Batman Forever
• Baywatch
• Guns N' Roses
• Mary Shelley's Frankenstein
• Maverick
• WWF Royal Rumble

Related tips

• WWF Royal Rumble added a coin door coil power interlock
• New #89 flashers flash once and blow: replace every dead bulb in the group
• Magnet driver MOSFETs on Last Action Hero and Guns N' Roses
• Two flipper boards on WWF Royal Rumble and Baywatch
• WWF Royal Rumble: CPU and display EPROM types and latest versions
• Removing the backbox door on Guns N' Roses and later
• Checking for voltage at a coil
• Testing a coil diode

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