TM 5-6350-264-14&P-10NAVELEX EE 181-AA-OMI-110/E121 C-9412T.O. 31S9-2FSS9-1-10Table 5-2. Troubleshooting Procedures - ContinuedTroubleProbable causeCorrective action2. (Cont)d. Bad PC boarda.Turn mode switch to ACCESS. Set multi-A8, or modemeter to dc volts and connect positiveswitch S3.lead to terminals 7 and negative lead to6 on TB9-A, and TB10-B, and TB11-C,and TB12-D, and TB13-E in turn. Metershould indicate 28 +2 vdc on each termi-nal board.b.If meter indications are not correct on someterminal boards, turn off switch S1 onpower supply. Remove PC board A8.Lift board ejector until board pops outof receptacle and then pull board straightout. Set multimeter to ohms and connectleads to chassis and terminal 6 on terminalboards where voltage was incorrect. Metershould indicate 0 ohms. Connect meterleads to J8-17 and terminal 7 of terminalboard where voltage was incorrect. Metershould indicate 0 ohms.(1)If meter does not indicate 0 ohmswhen connected to terminal 6,inspect jumper wires from term-inal 6 to 5, from terminal 5 to2, and wires that go to groundfor broken or loose connec-tions.(2)If meter does not indicate 0 ohmswhen connected to terminal 7,inspect wires from terminal 7to J12/P1, pin 24, and fromJ12/P1, pin 24 to J8-17 forbroken or loose connections.Resolder any bad connectionson P1.c.If meter indications are incorrect on allterminal boards, turn off switch S1 onpower supply. Remove PC board A8.Lift board ejector until board pops out ofreceptacle and then pull board straightout.d.Turn on switch S1 on power supply. De-press TRANSMITTER RESYNC switch5-41
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