J-SIIDS LEDA INTERFACE ASSEMBLY FAILURE

TM 5-6350-275-24&P

Table 3-6. J-SIIDS Interface Assemblies, DS Maintenance Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

2. J-SIIDS LEDA INTERFACE ASSEMBLY FAILURE (FO-8)

Step 1. On the Leda Flex PWA, monitor the Heartbeat LED. The LED should be flashing on and off approximately

once per second.

If the LED is flashing on and off, go to Step 2.

If the lamp is not flashing on and off, go to Step 4.

Step 2. Monitor the Tx and Rx LEDs on the Leda Flex PWA. The LEDs should flash on and off as data is being

transmitted to or received from the Stargate PWA.

If the Tx or Rx LED does not flash on and off, go to Step 3.

Step 3. Set multimeter to read ohms and check for open wiring between the Leda Flex PWA TB7 pins 4 and 5 and

Stargate PWA AUX 0 Connector pins 2 and 6.

NOTE:

Place a jumper wire across pins 2 and 6 on Stargate PWA.

If wiring is good, replace the Leda Flex PWA (Para. 3-92). (Remove jumper wire)

If wire is open, replace the wire and retest.

Step 4. Set multimeter to read dc volts. Place negative lead on TB7 pin 2 and the positive lead on TB7 pin 1. The

multimeter should read +12 v.

If the multimeter indication is correct, replace the Leda Flex PWA (Para. 3-92).

If dc voltage is not present, check for open wiring between the following points and replace as necessary:

FROM

Leda Flex PWA

Leda Flex Termination PWA

TB7 pin 1

TB8 pin 1

TB7 pin 2

TB8 pin 2

Leda Flex Termination PWA

12 VDC REGULATOR

TB8 pin 1

TB-1 pin 2

TB8 pin 2

TB-2 pin 3

3-33