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
4. (Cont)
d. (Cont)
for system to stabilize. Turn mode
switch to TEST/RESET and then
to SECURE.
m. If meter indicates less than 1 vdc at J10-7,
replace PC board A10.
(1) To install new PC board A10, 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 recept-
acle.
(2) 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.
n.
Set mode switch to ACCESS. Set multi-
meter to dc volts and connect positive
lead to PC board A1-TP1 (brown), and
negative lead to chassis (ground).
o.
If meter indicates less than 1 vdc, connect
positive meter lead to mode switch
(S3), terminal 2-1. Meter should indi-
cate 20 ± 1 vdc.
p.
If meter indicates less than 0.5 vdc, replace
mode switch.
(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
5-61
