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OPERATIONAL CHECK.  Continued - TM-11-5820-890-30-5_717
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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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TROUBLESHOOTING (cont) - TM-11-5820-890-30-5_719


TM 11-5820-890-30-5 14-9. OPERATIONAL CHECK.  Continued Step 11. CONTINUITY CHECKS. Action Response a.  Disconnect  W5  test  cable  P6  at  J1. a.  DMM  reads  less  than  5  ohms. Set  DMM  to  200  ohms  scale. If  not,  go  to  chart  11. RESPONSE:   6 RESP SEL: S2 TEST EQPT SELECTOR: DMM b.  Disconnect  W5  test  cable  P4  at  J5. b.  DMM  reads  less  than  5  ohms. Connect  P6  to  J1. If  not,  go  to  chart  12. RESPONSE:   10 RESP     SEL:     S1 c.   RESPONSE:   9 c.  DMM  reads  less  than  5  ohms. If  not,  go  to  chart  13. d.    RESP    SEL:    S2 d.  DMM  reads  less  than  5  ohms. If  not,  go  to  chart  14. e.   RESPONSE:   8 e.  DMM  reads  less  than  5  ohms. RESP     SEL:     S1 If  not,  8A2P1  is  bad. f.  Disconnect  W5  test  cable  P6  at  J1. f.  Scope  CH1  reads  400  to  600  mV  p-p. STIMULUS:    8 If  not,  8A2P1  is  bad. RESPONSE:   10 TEST  EQPT  SELECTOR:  SCOPE g.   STIMULUS:   6 g.  Scope  CH1  reads  400  to  600  mV  p-p. If  not,  8A2P1  is  bad. h.   STIMULUS:   7 h. Scope CH1 reads 400 to 600 mV p-p. RESPONSE:   9 If  not,  8A2P1  is  bad. i. STIMULUS: 5 i.  Scope  CH1  reads  400  to  600  mV  p-p. If  not,  8A2P1  is  bad. j.  Disconnect  W1  from  DMM. j.  DMM  reads  less  than  5  ohms.  If  not, Connect  test  leads  to  DMM. wire  from  8A2J3-B  to  8A2A1-E5, Disconnect  W5  test  cable  P5  at  J4. or  8A2J3,  is  bad. Connect  P5  to  J3. Connect  DMM  (-)  to  8A2E1. Connect  DMM  (+)  to  TP9. k.  Connect  DMM  (+)  to  TP12. k.  DMM  reads  less  than  5  ohms.  If  not, Connect  DMM  (-)  to  8A2E2. wire  from  8A2J3-C  to  8A2A1-E4, or  8A2J3,  is  bad. l.  Disconnect  DMM  test  leads. l.  DMM  reads  25  to  29  V  dc.  If  not, Connect  W1  to  DMM. wire  from  8A2J3-F  to  8A2TB1-2, Set  DMM  to  200  V  scale. or  8A2J3,  is  bad. TEST EQPT SELECTOR: DMM RESPONSE:   7 RESP SEL: S2 CB1: ON m.  Operational  Check  Is  Complete. 14-7


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