TM 5-6350-264-14&P-11
NAVELEX EE 181-AA-OMI-120/E121 C-7359-40-1
T.O. 31S9-2FSS9-1-11
Table 5-1. Troubleshooting Procedures - Continued
Trouble
Probable cause
Corrective Action
13. (Cont)
rack and pull module out of
rack. Place Sigrial Module on
bench. Remove screws and
lock washers from Signal
Module cover and remove
cover. Tag wires and use a
soldering iron of 50 watts
maximum to disconnect wires
from logic subassembly PC
board. Remove mounting
screws and lock washers. Re-
move logic subassembly PC
board from Signal Module.
(2)
To install new logic subassem-
bly PC board, position
board in Signal Module and
install mounting screws and
lock washers. Use a solder-
ing iron of 50 watts maxi-
mum to solder wires to PC
board. Position Signal
Module in mounting rack
and install mounting
screws. Connect wires to
terminal board TB1. Close
and latch mounting rack.
Close and lock Monitor
Cabinet door.
14. LAMP TEST or
Defective switch S1
a.
Turn off switch S1 on power sup-
ACKNOWLEDGE
on Signal Module.
ply. Set multimeter to ohms.
cannot be initiated
Connect meter leads to TB1-4
on Signal Module.
(Signal Module) and S1-2
(center terminal). Meter
should indicate 0 ohms. If
meter does not indicate 0
ohms, replace switch S1.
b.
Connect meter leads to S1-2 and
S1-1, then S1-2 and S1-3.
Both meter indications should
be 100,000 ohms or more. If
meter does not indicate
100,000 ohms, replace switch
S1.
5-22