Test points for relay-style flippers
Point 1 is the coil middle lug, 2 the coil end lug where the diode anode joins, 3 the button switch lug on the coil side, 4 the button lug on the relay side, and 5 the CPU/driver board connector pin. Start a game or test mode first.
Systems
- Williams System 11
- Williams System 11A
- Williams System 11B
- Williams System 11C
- WPC Alpha-Numeric
- WPC Dot Matrix
Related tips
- Early WPC games use relay-style flippers
- Flipper enable relay K1 on the CPU board
- Listen for flipper relay K1 when entering diagnostics
- Pre-Fliptronics games need a driver board with the flipper relay
- No flippers at all: flipper relay K1 not pulling in
- Flipper coils have two windings
- How the two windings of a flipper coil work
- Testing flipper coil diodes
Source: Pinball Machines: How They Work & Troubleshooting, Norbert Snicer