Which way a coil diode goes
The banded end of the 1N4004 goes on the coil lug carrying the power wire, which is usually the thicker wire that daisy-chains from coil to coil. The plain end goes on the lug with the thinner wire that runs to the driver transistor.
Systems
Related tips
- Which way a coil diode goes
- Testing the diode on a coil
- Testing a coil diode
- Testing a coil, switch or flipper diode with a meter
- What the coil diode does and how a bad one shows up
- Testing a coil diode on the driver board
- Testing the diodes on a flipper coil
- Coil diode and wire orientation when replacing a coil
Source: Repairing Williams System 3 to System 7 Pinball 1977 to 1984, Part Two, Clay Harrell (pinrepair.com)