SHORT/LONG PORTED COAXIAL CABLE SENSOR FAILURE (continued)

TM 5-6350-275-24&P

Table 3-9. Sensors DS Maintenance Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

14. SHORT/LONG PORTED COAXIAL CABLE SENSOR FAILURE (continued)

Step 7. Place T.P. switch to T12. The meter should read between +10 and +30.

If reading is above +30 vdc, replace control unit (Para. 3-121).

If reading is below +10 vdc, go to step 8.

Step 8. Check TX ALC red LED, CR19. The LED should be on.

If LED is not on, replace control unit (Para. 3-121).

If LED is on, check the TX and RX cables for a short or open center conductor.

If cables are good, replace control unit (Para. 3-121).

If cables are open or shorted, repair or replace as necessary.

15. ELECTRIC DOOR LOCK/DOOR SENSOR FAILURE (Figure 3-24)

NOTE

Refer to SAIG for details on the Electric Door Lock/Door Sensor.

Step 1. Remove cable connector P1 from solenoid connector J1. Using a multimeter, check for 24 vdc across

the two input leads on P1 with the exit pushbutton depressed.

If voltage is present, replace door lock/door sensor (in accordance with the SAIG).

If voltage is not present, go to step 2.

Step 2. Open the front panel on the IAC enclosure and check for 24 vdc on the IAC Printed Wiring Assembly

TB-2 pins 3 and 4. (Figure FO-9)

If voltage is present, replace the wiring between the IAC PWA and the electric door lock.

If voltage is not present, the problem is in the IAC. (Table 3-7, malfunction 1)

NOTE

Refer to TM 5-6350-275-10 operating procedures for checking repaired item(s).

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