Quantcast Section  IV.  MAINTENANCE  PROCEDURES (cont) - TM-11-5820-890-30-5_807

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Page Title: Section IV. MAINTENANCE PROCEDURES (cont)
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TROUBLESHOOTING  FLOWCHARTS.  Continued - TM-11-5820-890-30-5_806
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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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VISUAL INSPECTION OF BATTERY TRAY ASSEMBLY (cont)


TM 11-5820-890-30-5 Section  IV.  MAINTENANCE  PROCEDURES Subject Para General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  15-15 Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16 Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-17 Visual Inspection of Battery Tray Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-18 Visual Inspection of Battery Tray Subassembly (12A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-19 Replacement of Mounting Plate Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-20 Replacement of Battery Tray Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-21 Replacement of Battery Tray Circuit Card Assembly (12A1A1) . . . . . . . . . . . . . . . . . . . . . 15-22 Replacement  of  Connector  Board  Circuit  Card  Assembly  (12A1A2)  and  P1  Connector  .  15-23 Replacement of R1 Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-24 Replacement of VR1 Zener Diode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-25 Replacement of J1 Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-26 Replacement of U1 Voltage Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-27 Replacement of Terminal Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-28 Replacement of Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-29 Replacement of DS1 Lamp Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-30 Replacement of Seal Screw. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-31 Replacement of S1 Pushbutton Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-32 Replacement of Battery Tray Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-33 Replacement of Battery Box Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-34 Replacement of Threaded Screw Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-35 15-15.   GENERAL. Page 15-18 15-18 15-18 15-19 15-20 15-22 15-23 15-24 15-25 15-26 15-27 15-28 15-29 15-31 15-32 15-33 15-34 15-35 15-36 15-39 15-40 This   section   includes   the   operational   check,   repair   instructions,    and   visual   inspection   procedures.   The operational check is used to verify the operation of a repaired battery tray. lt is also used to verify the symptom of a faulty battery tray. It will identify the troubleshooting chart to be used. When a bad module is identified, replace it  using  the  procedure  in  this  section. 15-16. OPERATIONAL CHECK. Perform  the  operational  check  found  in  paragraph  15-11  to  verify  proper  operation  of  the  battery  tray. 15-17.  REPAIR  INSTRUCTIONS. The  following  instructions  apply  to  all  repair  tasks  unless  otherwise  noted  in  the  procedure. a. Begin  procedure  with  the  battery  tray  pushbutton  switch  S1  out  (not  pushed).  Do  not  press  the  S1 pushbutton  unless  directed  to  in  order  to  check  its  operation. b. Disconnect  any  external  cables  connected  to  the  battery  tray. c. Inspect  the  battery  tray.  Replace  the  battery  tray  case  if  the  battery  tray  is  physically  damaged,  such as  with  a  broken  connector.  The  visual  inspection  procedures  are  in  paragraphs  15-18  and  15-19. CAUTION Steps marked with             must be performed exactly as written. They are critical in maintaining the  nuclear  hardness  of  the  battery  tray.  Seals  must  not  be  damaged.  All  screws  must  be torqued  to  the  limits  specified  in  the  replacement  procedures. d. The  battery  tray  must  be  tested  after  replacement  of  a  module. 15-18


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