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OPERATIONAL CHECK.  Continued - TM-11-5820-890-30-5_537
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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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OPERATIONAL CHECK.  Continued - TM-11-5820-890-30-5_539


TM 11-5820-890-30-5 5-10. OPERATIONAL CHECK.  Continued Step 2. RF OUTPUT CHECK.  Continued Action i. j. k. l. m. n. o. p. q. r. s. t. Connect  equipment  as  shown  in  figure  5-4. Set RT CHAN: Press  handset Set RT CHAN: Press  handset Set RT CHAN: Press  handset Decrease  test to  22.0  V  dc. Press  handset 1. PTT switch and read DMM. 2. PTT switch and read DMM. 3. PTT switch and read DMM. power  supply  output  voltage PTT switch and read DMM. Increase  test  power  supply  output  voltage to  31.0  V  dc. Press  handset  PTT  switch  and  read  DMM. Decrease  test  power  supply  output  voltage to  27.5  V  dc. Step 3. RECEIVE PATH LOSS CHECK. Action a.  Set  RT  RF:  HI. b.  Press  handset  PTT  switch  and  read  DMM. Response i.   No   response. j.  No  response. k.  DMM  reading  is  10  to  14  dB  greater  than measurement  RT  1.  If  not,  go  to  chart  2. l.   No   response. m.  DMM  reading  is  10  to  14  dB  greater  than n. o. p. q. r. s. t. measurement  RT  2.  If  not,  go  to  chart  3. No  response. DMM  reading  is  10  to  14  dB  greater  than measurement  RT  3.  If  not,  go  to  chart  4. No  response. DMM  reading  is  8  to  12  dB  greater  than measurement  RT  3.  If  not,  the  power amplifier  heat  sink  (6A3)  is  bad. No  response. DMM  reading  is  10  to  14  dB  greater  than measurement  RT  3.  If  not,  the  power amplifier  heat  sink  (6A3)  is  bad. No  response. Response a.  No  response. b.  DMM  reading  is  not  more  than  1.5  dB below  measurement  RT  3.  If  it  is,  go  to chart  5. 5-9


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