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Page Title: REPLACEMENT OF VOLTAGE REGULATORS
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TM 11-5820-890-30-5 3-30. REPLACEMENT OF VOLTAGE REGULATORS. Tools: Soldering  kit Cross  tip  screwdriver,  #1  point Expendable  supplies: Alcohol Cotton  swabs Solder References: Paragraph  3-25  for  removal  and  installation  of  test  adapter  from  maintenance  group  lid. Figure  3-12  for  illustration  of  voltage  regulators. ITEM ACTION REMARKS REMOVAL a.  Two  screws  (57)  and Using  cross  tip  screwdriver,  remove  and Iockwashers  (56) retain  two  screws  and  Iockwashers  sec- uring  voltage  regulator  (55,  58,  or  59)  to power  supply  mounting  bracket  (63). b.   Wires Note  positions  of  all  wires  soldered  to power  supply  CCA  (65).  Using  soldering kit,  desolder  all  wires  from  CCA. c,   Voltage   regulator (55,  58,  or  59) INSTALLATION d.   Wires e.   Voltage   regulator (55,  58,  or  59) Pull  loose  from  mounting  socket  (87)  and mounting   bracket   (63).   Discard   defective voltage   regulator. See  figure  3-12  (sheet  3). See  figure  3-12  (sheet  3). NOTE: When  replacing  voltage regulator  U1  or  U3  (55  or 59),  remove  and  retain insulating  film  (54)  from between  regulator  and mounting   bracket. Using  soldering  kit,  solder  all  wires  to Before  and  after  soldering, correct  positions  on  CCA. clean  solder  joints  with cotton  swabs  and  alcohol. Insert  leads  of  replacement  voltage  regu- lator  through  mounting  bracket  (63)  and into  mounting  socket  (87).  If  insulating film  (54)  is  required  with  voltage  regulator, make  sure  film  is  on  regulator  before installing  it  on  mounting  bracket  (63). f.   Two   screws   (57)   and Using  cross  tip  screwdriver,  install  and These  were  removed  in Iockwashers  (56) tighten  two  retained  screws  with  lock- step  a. washers  through  voltage  regulator  (55, 58,  or  59)  and  into  mounting  socket  (87) securing  them  to  mounting  bracket  (63). 3-100


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