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
1. (Cont)
c.
(Cont)
f.
Turn on switch S1 on power supply. De-
press TRANSMITTER RESYNC switch
82. Wait about 5 minutes for system to
stabilize. During 5-minute stabilization
period, check power supply. Set multi-
meter 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 posi-
tive lead to TB2-5. Meter should indicate
5 +0.25 vdc. Connect positive lead to
TB2-2. Meter should indicate 28 +2 vdc.
Turn mode switch to TEST/RESET and
then to SECURE.
d. Incorrect sup-
a. Set multimeter to dc volts and connect
ply voltage
positive meter lead to PC board A10,
or bad tamper
TP1 (brown), and negative lead to chas-
sis (ground). Turn mode switch to SE-
CURE and ensure that no alarms are acti-
vated. Meter should indicate 18.5 to 21
vdc.
b. If meter indicates less than 1 vdc, turn
mode switch to ACCESS. Connect posi-
tive meter lead to power supply TB2-3.
Meter should indicate 20 + 1 vdc. Connect
positive meter lead to TB2-5. Meter
,should indicate 5 +0.25 vdc. Connect
positive meter lead to TB2-2. Meter
should indicate 28 +2 vdc.
c.
If any of these indications are not cor-
rect, turn off switch S1 on power supply.
Check wiring for poor or loose connec-
tions, broken wires, or frayed insulation.
Repair or replace any bad wiring.
d. If wiring is good, replace power supply.
(1)
To remove power supply, pull
main circuit breaker to remove
120 vac from CU. Disconnect
wires from battery. As battery is
heavy, lift and turn it to remove
from bottom of CU enclosure.
Tag and disconnect wires from TB2
5-19
