TM 5-6350-264-14&P-9NAVELEX EE 181-AA-OMI-100/E121 DZ-204T. O. 31S9-2FSS9-1-9Turn the operating mode switch to ACCESS.(1)If the AA is silent, put on earprotection and open the AA doorPull the TAS plunger all the way out.Remove screws that securefaceplate, and remove faceplateTurn off power switch located in theupper left corner of the AA Tag,disconnect, and insulate speakerwire from TB3-7.(2)If the AA continues to sound, tag,disconnect, and insulate green wire(from status processor) from TB4-1in the Control UnitInstall a jumperbetween TB4-4 and TB4-1 AAshould be silenced Put on earprotection and open AA door Pullthe TAS plunger all the way outRemove screws that secure thefaceplate, and remove the faceplate.Turn off power switch located inthe upper left corner of the AA. Tag,disconnect, and insulate speakerwire from TB3-7 in the Control Unit,remove the AA interconnecting wirefrom TB4-3 and connect a jumperwire from TB4-4 and TB43 Turn onpower switch in AA. The AAspeaker is now disabledand maintenance andtroubleshooting may be performed.(3)When maintenance ortroubleshooting has beencompleted, turn off power switch inAA In the Control Unit, removejumper wire from TB4-4 and TB4-3Connect AA interconnecting wire toTB4-3 In the AA, connect speakerwire to TB3-7; turn on power switchInstall and secure faceplate Closedoor on AA On Control Unit, turnoperating mode switch to TEST/RESET and then to SECURE.gInspect varistors for evidence of physicaldamage or overheating Disconnect one leadfrom each varistor from TB1. Set multimeter toohms and connect one lead to each varistor leadMeter should indicate over 100, 000 ohms.Check both varistors.hRefer to figure 5-1 for all test points found introubleshooting table 5-1 Figure 5-2 is a wiringdiagram of the Audible Alarm Step-by-steptroubleshooting procedures, including Trouble,Probable Cause, and Corrective Action, arelisted in table 5-1.5-3
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