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
7.
(Cont)
Bad PC board A8,
standoffs on side of CU enclosure.
or mode switch
Note that cable clamp goes under
S3. (Cont)
screw on bottom front of power
supply. Insert screws and tighten
to secure power supply. Connect
wires to TB1. Replace cover and
secure with screws. Connect
wires to TB2 and TB4. Position
battery outside CU enclosure.
Carefully insert battery end
first; turn and lower it into bot-
tom of CU enclosure. Connect
wires to battery terminals.
Switch on main circuit breaker.
(3) Turn on switch S1 on power sup-
ply. Depress TRANSMITTER
RESYNC switch S2. Wait
about 5 minutes for system to
stabilize. During 5-minute sta-
bilization period, check power
supply. Set multimeter to dc
volts and connect negative lead
to chassis (ground). Connect
positive lead to power supply,
TB2-3. Meter should indicate
20 ±1 vdc. Connect positive
lead to TB2-5. Meter should
indicate 5 ±0.25 vdc. Connect
lead to TB2-2. Meter should
indicate 28 ±2 vdc. Turn mode
switch to TEST/RESET and
then to SECURE.
m. If meter indicates 20 ±1 vdc at TB2-3,
turn off switch S1 on power sup-
ply. Set multimeter to ohms and
connect leads to TB2-3 and S3,
terminal 2-4. Meter should indi-
cate 0 ohms.
n.
If meter does not indicate 0 ohms, in-
spect wires from TB2-3 to S3,
terminal 2-4, for broken or loose
connections. Resolder any bad
connections.
5-99
