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Page Title: REPLACEMENT OF S1 PUSHBUTTON SWITCH (cont)
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TM 11-5820-890-30-5 Long  nose  pliers Torque  wrench 15-32. REPLACEMENT OF S1 PUSHBUTTON SWITCH. Tools: Cross  tip  screwdriver Soldering  kit Socket  wrench Soldering  aid 9/16  inch  socket Heat sink Expendable  Supplies: Solder Alcohol Cotton  swabs References: Paragraph  15-20  for  removal  and  installation  of  mounting  plate  assembly. ITEM ACTION REMARKS REMOVAL a.   Mounting   plate assembly  (2) b.  Battery  tray subassembly  (1) c.   S1   pushbutton   switch   (16) wires  (2) d.  Hex  nut  and  IET Iockwasher e.   S1   pushbutton INSTALLATION f.   S1   pushbutton switch  (16) switch  (16) g.                      Hex  nut  and  IET Iockwasher h.   S1   pushbutton   switch   (16) wires  (2) i. Mounting  plate assembly  (2) Remove  and  retain. Set  upside  down  on  work  surface  with left  side  toward  you. Tag  the  destination  of  each  wire  on  S1 pushbutton  switch.  Use  long  nose  pliers and  soldering  equipment.  Desolder  four wires  from  switch  contacts.  See  figures 15-5  and  15-6. Use  socket  wrench  and  9/16  inch  socket. Remove  and  inspect  hex  nut  and  IET Iockwasher  securing  S1  pushbutton switch  (16)  to  chassis.  If  damaged, obtain   replacement. Remove  and  discard. Obtain  replacement  S1  pushbutton  switch. Install  and  hand  tighten  retained  hex  nut and  IET  Iockwasher  securing  S1  pushbut- ton  switch  to  chassis.  Use  torque  wrench and  9/16  inch  socket.  Torque  nut  to 20 in-lb. Use  long  nose  pliers  and  soldering  equip- ment.  Attach  and  solder  tagged  wires  to correct  contacts  on  pushbutton  switch, and  remove  wire  tags. Install  retained  mounting  plate  assembly on  battery  tray  subassembly  (1). Refer  to  paragraph  15-20 for  removal  of  mounting plate   assembly. These  were  removed  in step  d. Before  and  after  soldering, clean  wires  and  contacts with  alcohol  and  cotton swabs. Refer  to  paragraph  15-20 for  installation  of  mounting plate   assembly. 15-35


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