LEDA FLEX TERMINATION PWA FAILURE (continued)

TM 5-6350-275-24&P

Table 3-4. SubRADC (Leda) With Power Supply DS Maintenance Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

2. LEDA FLEX TERMINATION PWA FAILURE (continued)

If the LED does not change to amber or stays in amber, replace the termination card PWA (Para. 3-64).

3. POWER SUPPLY, AC LINE LOSS FAILURE (Figure 3-4 and 3-6)

Step 1. Disconnect the 120 vac input power from power source.

Step 2. Remove the power entry module Fuse F1 and check for continuity across fuse.

If fuse is blown, replace (Para. 3-69) and have operator verify there is no longer an AC line loss failure.

If fuse is not blown, go to Step 3.

Step 3. Using a multimeter, check for + 13 to 15 vdc across Power Supply Printed Wiring Assembly + and - output

terminals.

If voltage is present, go to step 4.

If voltage is not present, replace Power Supply (Para. 3-65).

Step 4. Check for loose wire between Bridge Rectifier AC line input and Power Supply PWA + terminal and Leda

Flex Termination TB 6, pin 7.

Tighten or replace wiring as necessary. Have operator verify the assembly is no longer in alarm.

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