Diodes on coils: EM and solid-state coils are not interchangeable as-is
Most solid-state game coils (including flipper coils) have a diode across them and come with it fitted; EM coils have none. Fitting a coil without a diode in a solid-state game can burn the coil, blow fuses and destroy driver transistors or the power supply. Only use a solid-state coil in an EM game after removing its diode.
Systems
- Williams System 3
- Williams System 4
- Williams System 6 / 6A
- Williams System 7
- Williams System 9
- Williams System 11
- Williams System 11A
- Williams System 11B
- Williams System 11C
- WPC Alpha-Numeric
- WPC Dot Matrix
- WPC Fliptronics
- WPC DCS
- WPC-Security (WPC-S)
- WPC-95
- Bally MPU AS-2518-17
- Bally MPU AS-2518-35
- Stern MPU-100
- Stern MPU-200
- Bally 6803
- Gottlieb System 1
- Gottlieb System 80
- Gottlieb System 80A
- Gottlieb System 80B
- Gottlieb System 3
- Data East CPU Version 1/2
- Data East CPU Version 3
- Data East/Sega CPU Version 3b
- Capcom
- Electro-mechanical
Related tips
- Testing the diode on a coil
- Coil diode polarity
- Why solid-state games kick harder than EMs
- Protect coil diodes with a heat sink
- Testing a coil diode
- What a bad coil diode does
- Which way a coil diode goes
- Which way a coil diode goes
Source: Pinball Machine Care & Maintenance, Bernard B. Kamoroff (Bell Springs Pinball Alley)