ARMY TM5-6115–612-12
NAVY AG-320B0-0MM–000
4-77. POTENTIOMETER. (cont)
a.
Test. (cont)
(5) Set multimeter to measure resistance.
Place one probe on right contact and one on center
contact.
(6) On front of control panel, turn VOLTAGE
ADJUST knob (24) from all the way to the Ieft to all the
way to the right. Resistance reading should go from 0
to 10k ohms. If not, replace potentiometer (paragraph
4-77b.)
(7) Remove tag and connect wires to poten-
tiometer.
(8) Close control panel and secure with
turnlock fasteners.
(9) Close control panel access door.
(10) Connect battery cable plug connector to
battery.
b. Removal.
WARNING
To prevent injury, ensure that battery is dis-
connected before performing maintenance on
electrical components.
(1) Disconnect battery cable plug connector
from battery.
(2) Open control panel access door.
(3) Loosen turnlock fasteners and open
control panel.
(4) Tag and disconnect wiring from termi-
nals of VOLTAGE ADJUST potentiometer (27).
(5) Turn VOLTAGE ADJUST knob (24)
counterclockwise until it stops.
(6) Remove setscrew (23) and VOLTAGE
ADJUST knob (24).
(7) Remove nut (25). This allows removal of
potentiometer from back of panel.
(8) Remove washer (26) from potentiome-
ter (27).
c.
Installation.
(1) Turn shaft on new potentiometer (27)
counterclockwise until it stops.
(2) Place washer (26) on potentiometer.
(3) From back of panel, insert new poten-
tiometer into mounting hole.
(4) Secure potentiometer with nut (25).
Before tightening nut, ensure that potentiometer shaft
is positioned so that VOLTAGE ADJUST knob will be
pointing all the way left when looking at front of
control panel. Tighten nut until potentiometer is
securely mounted.
(5) Place VOLTAGE ADJUST knob (24) on
shaft and secure with setscrew (23).
(6) Remove tags and connect wiring to ter-
minals on back of potentiometer.
(7) Close control panel and secure with
turnlock fasteners.
(8) Close control panel access door.
(9) Connect battery cable plug connector to
battery.
Change 2
4-139
