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Page Title: Section Ill. TROUBLESHOOTING PROCEDURES (cont)
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TM 11-5820-890-30-5 Section  Ill.  TROUBLESHOOTING  PROCEDURES Subject Para Page General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-9 15-3 Test Precautions and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-10 15-3 Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-11 15-3 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-12 15-6 Explanation of Symbols and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-13 15-7 Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-14 15-7 15-9.  GENERAL. This section provides the troubleshooting procedures used to isolate a defective module within the battery tray. The troubleshooting information is presented in the form of flowcharts. They systematically get from a symptom to  the  bad  module. 15-10. TEST PRECAUTIONS AND NOTES. Set  the  test  power  supply  to  OFF  before  connecting  or  disconnecting  a  test  setup.  Current capacities are large enough to cause personal injury. Equipment can also be damaged if care is not  taken. CAUTION Static  electricity  and  stray  voltages  can  damage  the  battery  tray.  Use  an  antistatic  pad  on  the work  surface  and  wear  a  grounded  wrist  strap  when  troubleshooting  or  handling  the  modules. NOTE The  Principles  of  Operation  section,  functional  block  diagrams,  and  schematic  diagram,  figure FO-29,  can  be  used  to  help  fault  isolate  any  unusual  problems  that  might  not  recovered  in  the troubleshooting    procedures. 15-11. OPERATIONAL CHECK. The operational check provides a step-by-step procedure for evaluating a battery tray. If the operational check is passed, the battery tray can be returned to service. If it does not, the bad module or the troubleshooting chart to be  used  will  be  identified.  The  troubleshooting  procedures  are  in  paragraph  15-12. The operational check is divided into steps. Each step verifies a particular function. Follow the instruction in the “Action”  column.  Check  the  response.  If  the  response  is  correct,  proceed  with  the  next  lettered  step.  When  a Step  has  been  completed,  proceed  with  the  next  Step.  A  “No  response”  in  the  “Response”  column  means  that any  response  is  not  of  interest. The  switch  settings  for  the  test  equipment  are  given  in  the  “EQUIPMENT  PRESETS”  section  of  the  test  setup figure. Set the test equipment switches to the indicated presets and then verify the settings. If a test response is incorrect,  check  the  equipment  settings  and  the  test  adapter  cabling  before  going  to  a  troubleshooting  chart  or replacing  a  bad  module. Connect  equipment  as  shown  in  figure  15-1  to  perform  the  operational  check  of  the  battery  tray. 15-3


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