TM 5-6350-280-23&P
Table 4-2. Troubleshooting Table - continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. COM FAILURE INDICATED ON MONITOR AREA STATUS SCREEN FOR ALL MODULES - continued.
NOTE
Do not connect RX-TX cable assembly or RS-485 cable assembly while equipment
power is on.
Step 2.
Refer to TM 5-6350-280-10 turn equipment off, ensure RS-485 cable assembly and all RX-TX cable
assembly connections are secure, and refer to TM 5-63250-280-10 turn equipment on.
If COM failure is present for all modules on monitor area status screen go to step 3.
NOTE
Do not replace input/output CCA while equipment power is on.
Step 3.
Refer to paragraph 4.6.12 and replace input/output CCA.
If COM failure is present for all modules on monitor area status screen go to step 4.
NOTE
Do not replace RS-485 cable assembly while equipment power is on.
Step 4.
Refer to paragraph 4.6.15 and replace or repair RS-485 cable assembly.
If COM failure is present for all modules on monitor area status screen go to step 5.
NOTE
Do not replace communications CCA while equipment power is on.
Step 5.
Refer to paragraph 4.6.14 and replace communications CCA.
If COM failure is present for all modules on monitor area status screen refer to paragraph 4.6.5 and
replace RX-TX cable assemblies.
6.
TAMPER ALARM INDICATED ON MONITOR AREA STATUS SCREEN WITH CONVERTER MULTIPLEXER
ASSEMBLY (CMA) COMPLETELY CLOSED.
Step 1.
Open rear door of CMA. Pull plungers for tamper switches S1 and S8 fully out and check monitor area
status screen to see if tamper alarm is resettable.
If tamper alarm is resettable go to step 3, otherwise go to step 2.
Step 2.
Visually inspect to ensure wiring is properly connected to tamper switches.
Connect wiring to COMMON and OPEN terminals on tamper switches, otherwise go to step 5.
4-13
