Single-winding "Deger" flippers on Playboy and Monday Night Football

These two games use a single-winding flipper coil. Pressing the button sends 50 V DC to the coil; when the normally closed EOS switch opens at full stroke, the 50 V is removed and 9 V feeds the coil through a 1N5404 (400 V 3 A) diode mounted on the coil, so the flipper can be held without overheating. The coil also carries a normal 1N4004 suppression diode. Its third lug is only a tie point for the large diode.

Systems

• Data East CPU Version 1/2

Games

• Monday Night Football
• Playboy 35th Anniversary

Related tips

• Deger single-winding flippers on Playboy and Monday Night Football
• Flipper flutters when held (Playboy, Monday Night Football)
• Flipper stuck up with power on (Playboy and later)
• How Data East solid state flippers work (Robocop on)
• Testing the diodes on a flipper coil
• Testing a coil, switch or flipper diode with a meter
• Resets from damaged flipper coil diodes
• Reset or lock-up only when one device fires

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