TM 5-6350-275-24&P
Table 3-5. SubRADC (Leda) DS Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. LEDA FLEX TERMINATION PWA FAILURE (Figure 3-5 and 3-7)
Step 1. Check the lamp on the Leda Flex Termination card. If the lamp is on, go to Step 5.
If lamp is off, replace the termination card PWA (Para. 3-72).
If still off, reinstall the termination card PWA and replace the Leda Flex PWA (Para. 3-71).
If the Leda Flex Termination PWA still shows failure, replace ribbon cable between PL1 and P1.
If the Leda Flex termination PWA is still showing a failure, go to step 2.
Step 2. Using a multimeter, check for +12 vdc across TB8 pins 1 and 2.
If voltage is present, replace the PWA. (Para. 3-72)
If voltage is not present, go to Step 3.
Step 3. Using a multimeter, check for +12 vdc across Leda Flex PWA TB7, pin 1 and 2.
If voltage is present, replace wiring between TB7 pins 1 and 2 and the Leda Flex Termination Board TB8 pins 1
and 2.
If voltage is not present, check for +12 vdc across TBK pins 3 and 4 on the associated RADC rear panel
assembly.
If voltage is present, replace the wiring between TBK pins 3 and 4 and Leda Flex PWA, TB7 pins 1 and 2.
If voltage is not present, go to step 4.
Step 4. Using a multimeter, check for +12 v across TB1 pins 3 and 4 on the RADC Stargate PWA.
If voltage is present, replace wiring between TB1 pins 3 and 4 on the Stargate PWA and TBK pins 3 and 4 on the
RADC rear panel assembly.
If voltage is not present, replace the Stargate PWA. (Stargate 5000, Para. 3-38 and Stargate 1000, Para. 3-48)
Step 5. Make a visual inspection of the 12 LEDs (lamp indicators) on the Leda Flex Termination PWA. The LEDs
should be out, unless a sensor is in alarm or tamper (open or short). When the LED is red, the sensor is in alarm.
When the LED is green, the sensor is in tamper short. When the LED is amber (red & green), the sensor is in tamper
open.
If any of the LEDs are lit, remove the wire(s) to the input terminal(s) of the terminal board for the LED that is lit.
The LED should change to amber (tamper open).
If the LED does not change to amber or stays in amber, replace the termination card PWA (Para.. 3-72).
3-25
