NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
(2) To install new fuse F1, insert end
of fuse into knob from fuse
holder. Insert other end of
fuse into holder, push down on
knob, and screw in about 1/4
turn to lock.
(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
stabilization period, check
power supply. Set multimeter
to dc volts and connect nega-
tive 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.
If meter indicates less than 110 volts on
TB1, inspect main circuit breaker.
If circuit breaker is tripped, ensure
that there is no voltage on wires
and inspect for faulty wiring from
circuit breaker to CU power supply
TB1-1 and 2. Repair faulty wiring.
Turn on main circuit breaker. Connect
meter leads to TB1-1 and 2 in
power supply. If meter indicates
less than 110 volts, notify facility
personnel. Ensure that system is
operating properly on battery