Purpose

Replace the driver board with one a known-good one.

Safety Precaution

Turn off power at the Constant Current Regulator (CCR) and apply lockout/tagout before opening the fixture.

Tools Required

Flat head screwdriver.
Clean work surface.
Known-good replacement driver board.

Procedure

Open the fixture by unclipping the two clasps and removing the lens and ring.
Remove the light engine:
- Unscrew the two mounting screws.
- Unplug the LED connector.
Remove the red hold-down board (top bracket securing the driver board).
Slide the driver board out of the grooves in the base casting.
Unplug the power input wires from the driver board terminals.

Prepare the Replacement Driver Board (If using a new driver board)

Check for a thermal pad on the aluminum heatsink.
Ensure the pad has protective film in place before installation.
Peel off the protective film immediately before seating the new board.
Slide in the new driver board, ensuring it seats fully into the grooves.
Confirm the thermal pad makes solid contact with the fixture base.
Reconnect the power input terminals to the driver board.
Reinstall the red hold-down board securely.

Reassemble the Fixture

Plug the LED connector back into the new driver board.
Place the light engine so that the thru-hole is opposite the driver board.
Reinstall and tighten the two light engine screws.
Clean the inside edge of the base before sealing.
Align the lens ring recesses with the tabs on the base.
Verify glass color matches the LED side (if applicable).
Lower the lens ring into position and clip both clasps closed.

Safety Reminder

Always maintain safe working conditions by using appropriate personal protective equipment (PPE) where necessary.
Only qualified service personnel should perform driver board replacement on airfield LED fixtures.
Follow lock out / tag out procedures and verify absence of hazardous voltage before handling internal components.

Airport Lighting Company | L861(L) Medium Intensity Elevated Edge Light