Coil diode and wire orientation when replacing a coil
Every coil needs a 1N4004 diode across its lugs. The supply wire (thicker, or the pair of wires) goes to the lug with the banded end of the diode; the single thinner wire is the return to the driver board.
Systems
Related tips
- Testing the diode on a coil
- Testing a coil diode
- Which way a coil diode goes
- Which way a coil diode goes
- 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
- Spare diodes for coils and switches
Source: Repairing Bally Electronic Pinball Games from 1977 to 1985, Part One, Clay Harrell (pinrepair.com)