TM 9-4910-663-34
(1)
Disconnect main power from the test stand.
(2)
Remove the panel retaining screws from the top and sides of the instrument panel.
(3)
Swing the instrument panel down.
(4)
Disconnect wiring from the terminals of the potentiometer.
(5)
Remove the knob and the retaining nut from the shaft of the potentiometer, and remove the potentiometer
from the instrument panel.
(6)
Reverse the procedures of steps (1) through (5) to install the replacement potentiometer.
3-6.
CONTROL PANEL ASSEMBLY (fig 2-5)
a.
Description. The control panel assembly contains switches, circuit breakers, indicating lamps, rheostats, and
resistors used in operation of the test stand. It is hinged at the top and may be locked in the up position for convenient
access to electrical wiring. Repair at the direct support maintenance level is limited to test, remove, replace, repair, and
adjust defective electrical parts.
b.
Removal and Replacement of Toggle Switches.
(1)
Disconnect main power from the test stand.
(2)
Remove the panel retaining hardware from the sides and front of the control panel.
(3)
Raise the control panel and secure it in the up position with the toggle bolt.
(4)
Disconnect wiring from the terminals of the toggle switch that is to be replaced.
(5)
Remove the 15/32 nut from the front of the toggle switch.
(6)
Remove the toggle switch from the control panel.
(7)
Reverse the procedures of steps (1) through (6) to install the replacement toggle switch.
c.
Removal and Replacement of Circuit Breakers.
(1)
Disconnect main power from the test stand.
Change 1 3-14
