TM 5-6350-264-14&P-10
NAVELEX EE 181-AA-OMI-110/E121 C-9412
T.O. 31S9-2FSS9-1-10
Table 5-2. Troubleshooting Procedures - Continued
Trouble
Probable cause
Corrective action
9. (Cont)
b. (Cont)
e. If meter indicates 0 v on TB2, replace
power supply.
(1) To remove power supply, pull main
circuit breaker to remove 120
vac from CU. Disconnect wires
from battery. As battery is
heavy, lift and turn it to remove
from bottom of CU enclosure.
Tag and disconnect wires from
TB2 and TB4. Remove screws
that secure cover, and remove
cover. Tag and disconnect
wires from TB1. Carefully re-
move screws that secure power
supply to side of CU enclosure.
Be careful not to drop it inside
CU. Note cable clamp under
screw near TB4 (bottom front).
Support power supply and turn
it so wires can be tagged and
disconnected from TB3 on bot-
tom of power supply.
(2) To install new power supply, re-
move cover, and turn unit so
TB3 is accessible. Support
power supply, and connect
wires to TB3. Turn power sup-
ply upright and position it over
standoffs on side of CU enclose-
ure. Note that cable clamp goes
under screw on bottom front of
power supply. Insert screws
and tighten to secure power sup-
ply. Connect wires to TB1. Re-
place cover and secure with
screws. Connect wires to TB2
and TB4. Position battery out-
side CU enclosure. Carefully
insert battery end first; turn
and lower it into bottom of CU
enclosure. Connect wires to
battery terminals. Switch on
main circuit breaker.
5-115
