TM 9-4120-388-14
4-40. MODE
SELECTOR (ROTARY) SWITCH (S1).
This task consists of:
a. Remove
b. Inspection
c. Test
d. Replace
e. Installation
INITIAL SET-UP:
Equipment Condition
Remove.
a.
(1) Loosen setscrews in both knobs.
(2) Remove knobs.
(3) Remove four screws and lock nuts that secure rear panel.
(4) Pull rear panel away from box as far as harness will allow.
(5) Holding rear of mode selector switch, remove nut and Iockwasher from the shaft face.
b. Inspection.
(1)
Check switch to see that all leads and resistors (R1, R2 and R3) are properly connected. (See wiring dia-
Repair or replace all loose or broken leads.
(2)
Be sure that switch terminals are not loose, broken, or corroded.
(3)
(4)
Check switch for evidence of overheating or other visible damage.
Replace switch if damaged.
(5)