NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
(2) To install new power supply, remove
cover, and turn unit so TB3 is
accessible. Support power supply,
and connect wires to TB3. Turn
power supply upright and position
it over standoffs on side of CU en-
closure. 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. Con-
nect wires to TB2 and TB4. Posi-
tion battery outside CU enclosure.
Carefully insert battery end first;
turn and lower it into bottom of
CU enclosure. Connect wires to
battery terminals. Switch on main
(3) Turn on switch S1 on power supply.
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 posi-
tive 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
Turn mode switch to TEST/RE-
SET and then to SECURE.
Set multimeter to dc volts and connect posi-
tive meter lead to PC board A1-TP1
(brown), and negative lead to chassis
(ground). Turn mode switch to secure
and ensure that no alarms are activated.
Meter should indicate 18.5 to 21 vdc.
If meter still indicates less than 1 vdc, turn
off switch S1 on power supply. Re-
move PC board A8. Lift board ejector