TM 5-6350-280-23&P
Table 4-2. Troubleshooting Table - continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
TAMPER ALARM INDICATED ON MONITOR AREA STATUS SCREEN WITH CONVERTER MULTIPLEXER
ASSEMBLY (CMA) COMPLETELY CLOSED - continued.
Step 3.
Refer to paragraph 4.5.3 and test tamper switches.
Refer to paragraph 4.5.3 and replace defective tamper switches.
Step 4.
Check tamper switch mounting bracket position.
Loosen two nuts securing tamper switch mounting bracket to CMA frame. Adjust position of tamper
switch mounting bracket such that tamper switch closes when rear door is completely closed and opens
when rear door has moved 0.250 inches from its normally closed position.
Step 5.
Using volt ohm meter (VOM) refer to figure 4-4 and tables 4-6 through 4-10 and test tamper switch
electrical leads for continuity.
NOTE
Recommend that the tamper switches be tested in the following order: upper
drawer assembly, lower drawer assembly, front panel, and filter panel.
Replace damaged or defective wiring, otherwise repeat step 1 for upper and
lower drawer assemblies, front panel, and filter panel tamper switches.
7.
CONVERTER MULTIPLEXER ASSEMBLY (CMA) IS OPEN AND TAMPER ALARM IS NOT INDICATED ON
MONITOR AREA STATUS SCREEN.
NOTE
A volt ohm meter (VOM) is required for this procedure.
Using VOM check for +5 Vdc, at +5 Vdc terminal, on each central processing unit (CPU) CCAs in both drawer
assemblies.
If +5 Vdc is not present refer to troubleshooting procedure 4, step 2 and ensure power is available to each
drawer assembly and CPU CCA.
8.
MONITOR AREA STATUS SCREEN INDICATES UNINTERRUPTIBLE POWER SUPPLY (UPS) IS ON BATTERY
POWER YET AC POWER IS INDICATED ON UPS.
NOTE
A volt ohm meter (VOM) is required for this procedure.
Step 1.
Disconnect UPS status cable assembly and using VOM check for less than 1 ohm resistance between
pins 1 and 2 on UPS A/C input fail alarm connector.
If resistance is larger than 1 ohm refer to UPS manual and repair UPS as required, otherwise go to step
2.
Step 2.
Disconnect UPS status cable assembly from input/output CCA on converter multiplexer assembly (CMA)
and using VOM check for less than 5 ohms resistance between pins 1 and 2 of connector P2.
Replace UPS status cable assembly if open, otherwise go to step 3.
4-14
