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OPERATIONAL  CHECK.  Continued - TM-11-5820-890-30-5_793
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TM-11-5820-890-30-5 Ground Non-Icom Radio Sets Consisting of: Receiver-Transmitter Radio RT-1439/VRC (NSN 5896-01-195-0827) Manual
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TROUBLESHOOTING (cont) - TM-11-5820-890-30-5_795


TM 11-5820-890-30-5 15-11.  OPERATIONAL  CHECK.  Continued Step 1. BATTERY TRAY CHECK. Action Response a.  Connect  equipment  as  shown  in  figure  14-1. b.  Remove  28  V  lamp  from  test  adapter. c.  Connect  DMM  test  lead  (+)  to  test  adapter TEST  POINT  7.  Connect  DMM  test  lead  (-) to test adapter TEST POINT 12. Read DMM. d.  Install  28  V  lamp  into  test  adapter. e.  Disconnect  DMM  test  lead  (+)  from  test adapter TEST POINT 7. Set  test  adapter  28  V:  ON. f.   Wait   for   30   seconds. g.  Set  DMM  to  20  V  dc  scale. Connect  DMM  test  lead  (+)  to  test  adapter TEST POINT 9. h.  Press  battery  tray  switch  (S1). i.  Disconnect  DMM  test  leads  from  DMM  and test  adapter.  Connect  Jumper  from  test adapter TEST POINT 10 to TEST POINT 9. Press  battery  tray  switch  (S1). j.   Disconnect   jumper   from   test   adapter   TEST POINT 10 to TEST POINT 9. Connect  W1  cable  to  DMM. k.  Disconnect  W1  cable  from  DMM.  Connect test  leads  to  DMM.  Connect  (+)  test  lead  to test  adapter  POWER  +.  Connect  (-)  test lead  to  test  adapter  POWER  -. l.   Adjust   power   supply   for   output   voltage of  2.0  V  dc  (1.5  to  2.5  V  dc.  Read  DMM. m.  Disconnect  test  leads  from  DMM  and  test adapter.  Connect  W1  cable  to  DMM. Set  DMM  to  20  V  dc  scale.  Read  DMM. n.  Operational  Check  is  complete. a.  No  response. b.  No  response. c.  DMM  reading  is  greater  than  200  W. If not, the battery tray CCA (12A1A1) is bad. d.  No  response. e. Battery tray lamp (DS1) does  not light. If   it   does,   go   to   chart   1. f.  DS1  lamp  is  still   not   lit.  If  it  is,  the battery  tray  CCA  (12A1A1)  is  bad. g.  DMM  reading  is  14  to  16  V  dc. If  not,  go  to  chart  2. h.  DS1  lamp  lights.  If  not,  go  to  chart  3. i.  DS1  lamp  does  not light. If it does, the battery  tray  CCA  (12A1A1)  is  bad. j.  DMM  reading  is  14  to  16  V  dc. If  not,  the  wire  from  battery  tray  CCA- E16  to  J1-E,  or  connector  J1,  is  bad. k.  No  response. l.  DMM  reading  is  1.5  to  2.5  V  dc. m. DMM reading is -0.1 to +0.1 V dc. If not, the  battery  tray  CCA  (12A1A1)  is  bad. 15-5


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