Airfield Lighting Systems UK Limited
Aviation House, Russell Gardens, Wickford
Essex SS11 8BF Tel +44 1702 547866
www.alsukltd.co.uk
4.2.3 Remove and replace light source
1. Place the light fixture upside down, remove the six m5
× 16 hexagon screws, and separate the upper cover
from the bottom cover (if the upper cover and the bottom
cover are adhered too tightly, pry it open with the help of
a large slotted screwdriver).
2. Unplug the connector between the LED module and
the electrical driver and separate the upper cover and
the bottom cover.
3. Remove the four M4 × 10 cross pan head screws and
get out the LED light source assembly.
4. Attach the new LED assembly on the prism pressing
block in diagonal order with four m4 × 10 cross pan head
screws. (Confirm that the color and model of the light
source are consistent with the removed light source),
5. Connect the connector LED module to the electrical
driver in the bottom cover. Align the bottom cover with
the pin hole on the upper cover, and screw in the six m5
× 16 inner hexagon cap screw to fasten firmly.
6. Perform water-tightness test. If air leaks out of the
light fixture, locate the leaking point and open the lamp
for repair. After rechecking, assemble the light fixture
and perform the water-tightness test again.
