TM 5-6350-264-14&P-10NAVELEX EE 181-AA-OMI-110/E121 C-9412T.O. 31S9-2FSS9-1-10Table 5-2. Troubleshooting Procedures - ContinuedTroubleProbable causeCorrective action8.(Cont)Bad alarmb.Turn mode switch to SECURE and thenidentificationto TEST/RESET. Set multimetercircuitry.to dc volts. Connect positive meter(Cont)lead to A1-TP1 (brown) and nega-tive lead to chassis (ground). Notemeter indication. Connect positivemeter lead to A1-TP2, red, and neg-ative lead to chassis (ground). Notemeter indication. Repeat thesesteps for PC boards A2, A3, A4,AS, and A6. A meter indicationof 18.5 to 21 vdc on any TP1 indi-cates an intrusion alarm conditionfor the sensor or group of sensorsconnected to that PC board. Ameter indication of 18.5 to 21 vdcon any TP2 indicates a tamper alarmcondition for the sensor or groupof sensors connected to that PCboard. A meter indication of lessthan 0.5 vdc means no alarm.c.Set multimeter to dc volts and connectpositive meter lead to PC boardA7-TP1 (brown), and negative leadto chassis (ground). Push TASplunger all the way in, and thenpull plunger all the way out. Metershould indicate less than 0.5 vdcfor both switch positions. DepressTAS plunger and then release.Meter should indicate 18.5 to 21vdc.d.Set meter to dc volts and connect nega-tive lead to chassis. Connect posi-tive lead to TP1 (brown), on PCboard A1 through A6, in turn. Ifan intrusion alarm is indicated by18.5 to 21 vdc on any TP1, inspectLEDs. If wrong LED is lighted, orif no LEDs are lighted, connectpositive meter lead to each of sevengold pins on PC board A12. Ifmeter indicates 20 vdc on bottompin, and 0 volts on other six pins,replace PC board A12.5-101
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