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
9.
(Cont)
b.
(Cont)
(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 sta-
bilization period, check power
supply. Set multimeter to dc
volts and connect negative
lead to chassis (ground). Con-
nect 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.
c.
Bad ac
a.
Tag, remove, and isolate Data Transmit-
presence
ter or Monitor Cabinet wires from
circuitry.
TB6 and TB7. Set multimeter to
ohms and connect leads to TB6,
terminal S-3 and TB7, terminal
S-3R. If AC POWER indicator
light DS1 is on, meter should in-
dicate less than 2,000 ohms. If
indicator light DS1 is off, meter
should indicate more than
100,000 ohms.
b.
If meter indications are not correct, turn
off switch S1 on power supply. Con-
nect meter leads to TB3-1 and TB6,
terminal S-3, and then to TB3-2
and TB7, terminal S-3R.
c.
If meter indicates more than 100,000
ohms, inspect wires for broken or
loose connections. Resolder any
bad connections.
5-116
