NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
Tag, remove, and isolate Data Transmitter
or Monitor Cabinet wires from TB6,
terminals S-2 and S-2R. Turn mode
switch S3 to SECURE. Set multi-
meter to ohms and connect leads to
TB6, terminals S-2 and S-2R.
If meter indicates less than 2,000 ohms,
replace PC board A8.
Turn mode switch to TEST/RESET and
back to SECURE. Meter should
indicate less than 2,000 ohms for
4.5 to 6 seconds.
If meter indicates less than 2,000 ohms
for less than 4.5 or more than 6 sec-
onds. Replace PC board A8.
(1) To remove PC board A8, turn off
switch S1 on top of power supply.
Place thumb or finger under board
ejector and lift up until board pops
out of receptacle at back of status
processor. Then grasp PC board
and pull straight out.
(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 recep-
tacle at back of processor. Then
press firmly on board until it
seats completely in receptacle.
(3) Turn on switch S1 on power sup-
ply. Depress TRANSMITTER
RESYNC switch S2. Wait about
5 minutes for system to stabil-
ize. During 5-minute stabiliza-
period, check power supply.
Set multimeter to dc volts and
connect negative lead to chassis
(ground). Connect positive lead