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)
(1)
If meter indication is correct, install
new PC board A8.
(2)
To install new PC board A8, turn off
switch S1 on top of power supply,
turn board so plastic ejector is to-
ward top. Align board with guides
at top and bottom of status proces-
sor. Slide board straight in until it
contacts receptacle at back of pro-
cessor. Then press firmly on board
until it seats completely in recepta-
cle.
(3)
Turn on switch S1 on power supply.
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 neg-
ative meter lead to chassis. Meter
should indicate 20 1 vdc.
h.
If meter indicates 0 v, connect positive lead
to S3, terminal 2-4, but not at 2-1.
i.
If meter indicates 20 +1 vdc, replace mode
switch S3.
(1)
To remove mode switch, turn off
switch S1 on top of power supply.
Remove large hex nut that secures
switch mounting bracket to inside
of CU door. Remove switch and
mounting bracket together. Be
careful not to lose switch arm be-
cause it is not secured to switch
shaft. Remove spacer and lock
from door so no items will be lost.
Remove small hex nut and lock
washer that secures mounting
bracket and switch stop to switch
shaft. Remove mounting bracket
5-44