TM 9-4120-408-14
4-22. LIGHT EMITTING DIODE (LED) ASSEMBLY MAINTENANCE. (Continued)
NOTE
or LED assemblies DS-1 - DS-3, refer to wiring diagram H-1 to disconnect electrical leads.
F
bserve polarity of LED assembly.
O
(2) Tag and disconnect two electrical leads (3), wiring harness lead (4), and resistor lead (5) from terminal board,
TB2, (6).
(3) Remove nut (7), lock washer (8), and LED assembly (9).
c. Repair.
(1) Inspect casing of LED assembly (9) for cracks, corrosion, and broken, missing, or loosely mounted bulb.
(2) Inspect electrical leads (3) for burns, damaged or missing terminals, and cracked or damaged insulation.
(3) Inspect mounting hardware for damage.
(4) If mounting hardware or casing of LED assembly (9) is cracked, corroded, or has a broken, missing, or loosely
mounted bulb, replace LED assembly (9).
(5) If electrical leads (3) are damaged, refer to Appendix F, Figure F-5 and repair LED assembly (9).
d. Install.
(1) Install LED assembly (9) in control module housing (10) and secure with lock washer (8) and nut (7).
CAUTION
Refer to tags and observe polarity, noted during removal, when installing LED assembly.
Failure to
observe polarity may result in damage to equipment.
(2) Refer to tags and secure resistor lead (5), wiring harness lead (4), and electrical leads (3) to terminal board, TB2,
(6) with screws (1 and 2). Remove and discard tags.
(3) Follow on maintenance:
(a) Refer to applicable technical manual and connect power.
(b) Refer to paragraph 4-20 and install control module top panel.
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