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 action4.(Cont)a. (Cont)ejector and lift up until board popsout of receptacle at back of statusprocessor. Then grasp PC boardand pull straight out.(2)To install new PC board, turn board soplastic ejector is toward top. Alignboard with guides at top and bot-tom of status processor. Slideboard straight in until it contactsreceptacle at back of processor.Then press firmly on board until itseats completely in receptacle.(3)Turn on switch S1 on power supply.Depress TRANSMITTER RESYNCswitch S2. Wait about 5 minutesfor system to stabilize. During5-minute stabilization period, checkpower supply. Set multimeter todc volts and connect negative leadto chassis (ground). Connect posi-tive lead to power supply, TB2-3.Meter should indicate 20 + 1 vdc.Connect positive lead to TB2-5.Meter should indicate 5 ±0.25 vdc.Connect lead to TB2-2. Metershould indicate 28 2 vdc. Turnmode switch to TEST/RESET andthen to SECURE.4.(Cont)b. Bad tampera.Tag, remove, and isolate Data Transmitteralarm oror Monitor Cabinet wires from TB6,voltageterminals S1-D and S1-DR.monitorcircuitry.b.Set multimeter to dc volts and connect posi-tive meter lead to PC board A7-TP1(brown), and negative lead to chassis(ground). Push TAS plunger all theway in, and then pull plunger all theway out. Meter should indicate lessthan 0.6 vdc for both switch positions.Depress TAS plunger and then release.Meter should indicate 18.5 to 21 vdc.c.If these meter indications are not correct,turn off switch S1 on top of powersupply. Use board ejector to remove5-53
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