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
7.
(Cont)
Bad PC board A8,
(6) If meter indication is correct, turn
or mode switch
off switch S1 on power sup-
S3. (Cont)
ply. Set meter to ohms and
connect leads to TB2-2 and
J8-18. Meter should indicate
0 ohms.
(7) If meter does not indicate 0 ohms,
inspect wires from TB2-2 to
J12/P1 pin 26 to J8-18 for
broken, loose, or bad connec-
tions on P1.
f.
If meter indicates 28 ±2 vdc at J8-18,
connect positive meter lead to
J8-16 and negative lead to chassis.
Meter should indicate 18.5 to 21
vdc.
(1) If meter indication is correct, re-
place PC board A8.
(2) To install new PC board A8, turn
board so plastic ejector is to-
ward top. Align board with
guides at top and bottom of
status processor. Slide board
straight in until it contacts re-
ceptacle at back of processor.
Then press firmly on board
until it seats completely in re-
ceptacle.
(3) Turn on switch S1 on power sup-
ply. Depress TRANSMITTER
RESYNC switch S2. Wait
about 5 minutes for system
to stabilize. Turn mode switch
to TEST/RESET and then to
SECURE.
g.
If meter does not indicate 18.5 to 21 vdc
at J8-16, connect positive meter
lead to mode switch S3, terminal
2-1 and negative meter lead to
chassis. Meter should indicate
20 ±2 vdc.
5-96
