NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
TB4 (bottom front). Support
power supply and turn it so wires
can be tagged and disconnected
from TB3 on bottom of power sup-
To install new power supply, re-
move cover, and turn unit so TB3
is accessible. Support power sup-
ply, and connect wires to TB3.
Turn power supply upright and
position it over standoffs on side of
CU enclosure. Note that cable
clamp goes under screw on bottom
front of power supply. Insert
screws and tighten to secure power
supply. Connect wires to TB1. Re-
place cover and secure with screws.
Connect wires to TB2 and TB4.
Position battery outside CU en-
closure. 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.
Turn on switch S1 on power sup-
ply. Depress TRANSMITTER
RESYNC switch S2. Wait about 5
minutes for system to stabilize.
During 5-minute stabilization
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 indi-
cate 20 1 vdc. Connect positive
lead to TB2-5. Meter should indi-
cate 5 0.25 vdc. Connect lead to
TB2-2. Meter should indicate 28
+ 2 vdc. Turn mode switch to
TEST/RESET and then to SE-
If voltage changes above 125 vac or be-
low 110 vac, notify facility personnel.