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REPLACEMENT OF REMOTE CONTROL TRANSFORMER CCA.  Continued
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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  POWER  SUPPLY  HEATSINK.  Continued - TM-11-5820-890-30-5_519


TM 11-5820-890-30-5 4-74. REPLACEMENT OF POWER SUPPLY HEATSINK. Tools: Flat  tip  screwdriver Spanner  wrench Cross  tip  screwdriver Spanner  adapter Torque   screwdriver 1-1/16-inch   socket Soldering  kit Expendable  Supplies: Sealing  compound,  grade  H Cotton  swabs Silicone   compound Solder References: Paragraph Paragraph Paragraph 4-51  for  removal  and  installation  of  Power  Supply  (5A1). 4-53  for  removal  and  installation  of  Transistor  Q1. 4-54  for  removal  and  installation  of  Connector  J9. Adjustable  wrench Socket  wrench Hex socket Alcohol ITEM ACTION REMARKS REMOVAL a.  Access  cover  (1) b.   Eight   screws   (5)   and flat  washers c.   Three   screws   (6),   flat washers,  and  cable clamps  (7) d.   Connector   W3P3 e.   Connector   W1P2   (1) f.   20   captive   screws g.   Heatsink   assembly   (11) Using  flat  tip  screwdriver,  fully  loosen  15 captive  screws  (2)  securing  access  cover (1)  to  audio  amplifier  chassis  (3).  Remove and  retain. Using  cross  tip  screwdriver,  remove  and retain  eight  screws  (5)  and  flat  washers securing  1-Watt  audio  amplifier  CCA  (4) to  audio  amplifier  chassis  (3). Using  cross  tip  screwdriver,  remove  and retain  three  screws  (6),  flat  washers,  and cable  clamps  (7)  securing  1-Watt  audio amplifier  CCA  (4)  and  cables  to  audio amplifier   chassis   (3). Loosen  two  jackscrews  and  disconnect  con- nector  W3P3  (2)  from  1-Watt  audio  amplifier CCA  connector  J1. Loosen  two  jackscrews  and  disconnect  con- nector  W1P2  (1)  from  1-Watt  audio  amplifier CCA  connector  J2. Using  flat  tip  screwdriver,  fully  loosen  20 captive  screws  securing  heatsink  assembly (11)  to  power  supply  cover. Lay  heatsink  assembly  on  its  fins. See  figure  4-14. See  figure  4-14. See  figure  4-14. CAUTION Carefully  lay  on  fins  to ensure  casting  does  not rest  on  components  inside power  supply  cover. 4-195


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