NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
and TB4. Remove screws that se-
cure cover, and remove cover. Tag
and disconnect wires from TB1.
Carefully remove screws that se-
cure 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 fromTB3 on bottom
of power supply.
(2) 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.
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 bottom of CU enclosure. Con-
nect 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.
Turn mode switch to TEST/RESET
and then to SECURE.
Set multimeter to dc volts and connect
positive meter lead to PC board A10,
TP1 (brown), and negative lead to chassis
(ground). Turn mode switch to SE-
CURE and ensure that no alarms are acti-
vated. Meter should indicate 18.5 to