TM 9-4120-407-14
3-23. FAULT INDICATORS (LED'S) TESTING AND REPLACEMENT. (Cont)
(2) Reverse leads from above and m-test. The multimeter should give no indication of voltage drop.
(3) Replace any light emitting diode (2) if the voltage drop indicated is not within the values
specified.
b.
Removal
(1) Tag and disconnect light emitting diode (2) black wire lead from connector (1).
(2) Remove cap splice from light emitting diode (2) red wire lead bundle.
(3) Push light emitting diode (2) out of control panel (3).
c.
Installation.
(1) Carefully pass light emitting diode (2) wire leads through hole in control panel (3) and press
light emitting diode into control panel.
(2) Connect light emitting diodes (2) red leads together in a bundle and crimp on an appropriate cap
(3) Connect light emitting diode (2) black lead to connector (1) using tags and control panel wiring
diagram. See paragraph 3-19 for general repair information. Remove tags.
NOTE
FOLLOW-ON MAINTENANCE:
Assemble and install the control panel. See para 3-20.
3-24. ROTARY SWITCH (S1) TESTING AND REPLACEMENT.
This task covers:
a. Testing
b. Removal
c. Installation
INITIAL SETUP
Tools
Equipment Conditions:
Service Refrigeration Unit Tool Kit
Control panel removed and disassembled as
necessary to access rotary switch. See
Materials/Parts
a.
Testing.
follows:
( a ) With knob (2) in OFF RESET position, continuity should be indicated between connector (P6)
3-92