TM 5-6350-264-14&P-9 NAVELEX EE 181-AA-OMI-100/E121 DZ-204 T. O.  31S9-2FSS9-1-9 moisture, and bits of wire or solder inside the housings. NOTE Touchup  paint  is  recommended  instead of refinishing whenever practical. (6) Inspect  all  metal  surfaces  intended to  be  painted  for  condition  of  finish and legibility of panel lettering. HIGH  VOLTAGE  is  used  in  the  operation  of this   equipment   DEATH   ON   CONTACT   may result    if    personnel    fail    to    observe    safety precautions   Learn   the   areas   containing   high voltage   in   the   equipment.   Be   careful   not   to contact high voltage connections when installing   or   operating   this   equipment   Never work  on  electronic  equipment  unless  there  is another person nearby who is familiar with the hazards of the  equipment  and  is  competent  in administering first aid. Power to the J-SIID system must be shut down before   any   repairs   or   replacements   can   be performed on the Audible Alarm. The Audible Alarm presents a noise  hazard  to personnel in the area  The noise level exceeds the  allowable  limits  for  unprotected  personnel. Authorized  ear  protective  equipment  must  be worn  by  all  personnel  in  the  work  area  Before any troubleshooting procedures are at tempted the Audible Alarm must be disabled. While performing maintenance or troubleshooting  on  the  Audible  Alarm,  ensure that    test    points    and    terminals    are    never grounded  or  shorted  to  each  other  or  to  the chassis This will cause serious damage to the internal components. When taking measurements with a multimeter, ensure that the meter is set to the proper scale and   range   before   inserting   probes   into   the circuit. f. To disable the Audible Alarm (AA) for maintenance   or   troubleshooting,   notify   proper authorities per installation/site security procedures Enter the Control Unit area and turn the   operating   mode   switch   (key   operated)   to TEST/RESET    position    If    the    audible    signal device in the CU sounds, ignore it for a moment. Inspect the Control Unit door to ensure that it is flat, straight, and completely closed. Open the  door,  pull  the  Tamper  Alarm  Switch  (TAS) plunger all the way out, and ensure that there is no debris between the door and enclosure. NOTE There are six Light Emitting Diodes (LED’s) on PC  board  A12  in  the  upper  right  corner  of  the Control  Unit  Note  any  of  these  LED’s  that  are on  Any  LED  that  is  on  indicates  a  sensor  that has been activated and should be investigated before troubleshooting the Audible Alarm. 5-2