Quantcast REPAIR  PROCEDURES - TM-11-5820-890-30-5_614

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TROUBLESHOOTING FLOWCHARTS. Continued - TM-11-5820-890-30-5_613
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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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REPAIR PROCEDURES. Continued


TM 11-5820-890-30-5 Section  IV.  MAINTENANCE  PROCEDURES Subject Para General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18 Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19 Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20 Disassembly for Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21 Replacement of Back Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  6-22 Replacement of Control-Monitor Chassis (7A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23 Replacement of Control-Monitor Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24 Page 6-45 6-45 6-45 6-46 6-47 6-47 6-48 6-18. GENERAL. This  section  includes  the  operational  check  and  the  repair  procedures.  The  operational  check  is  used  to  verify the  operation  of  a  repaired  control-monitor.  It  is  also  used  to  verify  the  symptom  of  a  faulty  control-monitor.  It will identify the troubleshooting chart to be used. When a bad module is identified, replace it using the procedure in  this  section. 6-19.  OPERATIONAL  CHECK. Perform  the  operational  check  found  in  paragraph  6-13  to  verify  the  proper  operation  of  the  control-monitor. 6-20.  REPAIR  PROCEDURES. Repair  of  the  control-monitor  consists  of  replacing  a  bad  module. A  module  is  replaced  by  removing  it  and installing  a  good  one. Procedures  for  doing  this  follow: a. General  Instructions.   The  following  instructions  apply  to  all  repair  tasks. 1. Remove  all  cables  connected  to  the  control-monitor. 2. Inspect   the   control-monitor   for   damage. Repair  any  obvious  physical  damage. 3. Use  the  module  extractor  to  remove  the  circuit  card  assemblies.  It  is  included  in  the maintenance  tool  kit.  It  is  used  as  follows: (a) (b) (c) (d) (e) (f) Locate  the  module  to  be  removed. Hook  the  module  extractor  through  the  two  holes  in  the  top  corners  of  the module. Hold the module extractor with one hand. Rest the other hand on the control- monitor  with  the  fingers  of  the  hand  on  top  of  the  module  to  be  removed. Pull  steadily  with  the  module  extractor  until  the  module  connector  is  free  of the  parent  board. Remove  the  module. Unhook  the  module  extractor. 4. Handle  all  modules  carefully. 5. Before  installing  a  module,  check  the  connectors  or  terminals  for  bent  or  broken  pins. Do  not  install  if  damaged. 6.  Complete  the  operational  check. 6-45


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