SHORT/LONG PORTED COAXIAL CABLE SENSOR FAILURE

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 (Figure 3-23)

NOTE

Refer to SAIG for details on the Short/Long Ported Coaxial Cable Sensors.

Step 1. Open door on transmitter/receiver unit (1) and observe that power switch (2) is on and power on lamp (3) is

lit.

If power on lamp is not lit, go to step 2.

If power on lamp is lit, go to step 4.

Step 2. Go to input power supply and check to ensure power supply switch is on. The two dc power on lamps (5)

should be lit.

If dc power lamps (5) are not on, remove power, check for blown fuses, if blown, replace fuses.

Step 3. Turn on power supply switch. The dc power on lamps should be on.

If lamps are not on, go to step 4.

If lamps are on, go to step 5.

Step 4. Set multimeter to read vac. Check for correct ac input voltage at input power receptacle.

If input power is correct, replace power supply.

If input power is not correct, contact facility engineers.

Step 5. Press local self test pushbutton (4).

If self test initiates an intrusion alarm for zone in which control box is transmitting unit, processing unit is

operational. If an alarm still exists, go to step 6.

Step 6. Check T.P. readings for proper range as shown on scale at bottom of control unit. If T7, T8, or T12 is out

of tolerance, do the following. Remove control unit front panel by removing eight screws holding panel to

enclosure. Check signal supervision GRN LED, CR22. The LED should be off.

If LED is on, disconnect alarm wires.

If alarm clears, replace control unit (Para. 3-121).

If alarm does not clear, repair or replace cable.

If LED is not illuminated, go to step 7.

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