ADB 94A0627/X, Service Bulletin

Page: 4 / 6

ICAO LED Sign Light Strip Replacement ALN156 Rev. A
Installation 5/1/12
© 2010 ADB Airfield Solutions All Rights Reserved 2
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Contents
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Installation
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Operation
Parts
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1.2 Installation
To replace the ICAO LED Sign light strip, follow these procedures.
1. Turn off the ICAO LED sign.
2. Remove the top cover and remove the sign face panels.
3. Determine the light strip to replace, note the polarity of the strip.
4. Align the replacement LED light strip next to the one to be replaced.
5. Disconnect the old LED light strip by cutting the wires nearest to the failed LED light strip.
6. Peel off the failed strip from the panel by pulling up one end then pulling back the rest.
7. Remove remaining adhesive by cleaning with alcohol.
8. Align the replacement LED light strip with top and bottom edge of the light panel and
centered over where LED strip was removed, mark the holes with a permanent marker.
Make sure that polarity matches that of removed LED strip.
9. Drill the two 5/32 or 0.156-inch (4 mm) diameter holes.
10. Align the LED light strip and attach to the panel with the two 6-32 screws, washers and
nuts, included.
11. Strip back the wire insulation to 1/4 - 3/8 inch (6.3 - 9.5 mm) to connect to the new LED
light using the blade terminal block. Trim to provide proper fit.
12. Connect the wires from the replacement LED light strip with the blade terminal block by
lifting a blade with an open space, insert the wire and press down the blade to hold the
wire firmly in place.
13. Turn on the ICAO LED Sign to test the LED light strip and panel.
14. If the strip is working correctly, replace the sign face panels and top cover.
If the LED light strip is not working, turn off the sign.
Check your work, connections, polarity and for damage to the LED light strip.
Check
polarity
6-32 X 1/2 PAN HD PHIL
#6-32 HX NUT
#6 INT LOCKWASHER
Drill Holes here
Cut here
and strip
back
sheath
Align
Blade Terminal
Block
Match
polarity