Flipper circuit on Laser War to Time Machine

These games use conventional dual-wound flipper coils: a thick, low-resistance power winding and a thin, high-resistance hold winding, wired in parallel with an outer lug as the common. A normally closed EOS switch drops out the power winding at full stroke. Two diodes are required on the coil, and a 2.2 uF 250 V capacitor across the EOS reduces arcing.

Systems

• Data East CPU Version 1/2

Games

• Laser War
• Secret Service
• Time Machine
• Torpedo Alley

Related tips

• Flipper coil runs very hot (Time Machine and earlier)
• Weak flipper on Time Machine and earlier: pitted switch contacts
• Flipper flutters when held (Time Machine and earlier)
• Checking a pre-solid-state flipper coil
• Pre-solid-state flipper keeps blowing its fuse
• Flipper sometimes sticks up, even with power off: replace the coil sleeve
• Flipper only has hold strength after a rebuild: EOS wire on the wrong coil lug
• Laser War can have a version 1 or version 2 CPU

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