Quantcast Section  IV.  MAINTENANCE  PROCEDURES (cont) - TM-11-5820-890-30-5_879

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Page Title: Section IV. MAINTENANCE PROCEDURES (cont)
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TROUBLESHOOTING  FLOWCHARTS.  Continued - TM-11-5820-890-30-5_878
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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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REPLACEMENT  OF  REAR  COVER  ASSEMBLY  (15A1) (cont)


TM 11-5820-890-30-5 Section  IV.  MAINTENANCE  PROCEDURES Subject Para Page General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-14 17-24 Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-15 17-24 Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-16 17-24 Replacement  of Replacement  of Replacement  of Replacement  of Replacement  of Rear Cover Assembly (15A1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-17 17-25 Case/Flexible Cable Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-18 17-26 Loudspeaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-19 17-28 ON/OFF Switch (CB1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-20 17-29 POWER Lamp Holder (DS1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-21 17-30 17-14.   GENERAL. This  section  includes  the  operational  check  and  the  repair  procedures.  The  operational  check  is  used  to  verify the  operation  of  a  repaired  LS-671/VRC.  It  is  also  used  to  verify  the  symptom  of  a  faulty  LS-671/VRC.  It  will identify the troubleshooting chart to be used. When a bad module is identified, replace it using the procedure in this  section. 17-15. OPERATIONAL CHECK. Perform  the  operational  check  found  in  paragraph  17-9  to  verify  proper  operation  of  the  LS-671/VRC. 17-16.  REPAIR  INSTRUCTIONS. The  following  instructions  apply  to  all  repair  tasks  unless  otherwise  noted  in  the  procedure. a. b. c. d. Begin  procedure  with  the  LS-671/VRC  ON/OFF  switch  (CB1)  set  to  OFF. Disconnect  any  external  cables  connected  to  the  LS-671/VRC. lnspect the LS-671/VRC. Replace the LS-671/VRC case/flexible cable assembly, if the LS-671/VRC is physically  damaged,  such  as  with  a  broken  connector. CAUTION Steps marked with           must be performed exactly as written. They are critical in maintaining the  nuclear  hardness  of  the  LS-671/VRC.  Seals  must  not  be  damaged.  All  screws  must  be torqued  to  the  limits  specified  in  the  replacement  procedures. The  LS-671/VRC  must  be  tested  after  replacement  of  a  module  or  component. 17-24


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