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Troubleshooting Procedures - Continued | Up
TM-5-6350-264-14P-10 Alarm Set Control Manual | Next
Troubleshooting Procedures - Continued |
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
2. (Cont)
d. (Cont)
S2. 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 positive
lead to power supply, TB2-3. Meter
should indicate 20 ±1 vdc. Connect posi-
tive lead to TB2-5 vdc. Meter should in-
dicate 5 ± 0.25 vdc. Connect lead to
TB2-2. Meter should indicate 28 ± 2 vdc.
e.
Set multimeter to dc volts and connect posi-
tive lead to J8-18 and negative lead to
chassis. Meter should indicate 28 +2 vdc.
(1)
If meter indication is not correct
at J8-18, connect positive meter
lead to power supply TB2-2 and
negative lead to chassis. Meter
should indicate 28 ±2 vdc.
(2)
If meter does not indicate 28 +2 vdc
at TB2-2, replace power supply.
(3)
To remove power supply, pull main cir-
cuit breaker to remove 120 vac
from CU. Disconnect wires from
battery. As battery is heavy, lift
and turn it to remove from bot-
tom of CU enclosure. Tag and
disconnect wires from TB2 and
TB4. Remove screws that secure
cover, and remove cover. Tag and
disconnect wires from TB1. Care-
fully remove screws that secure
power supply to side of CU en-
closure. 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 discon-
nected from TB3 on bottom of
power supply.
(4)
To install new power supply, remove
cover, and turn unit so TB3 is ac-
cessible. Support power supply,
5-42
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