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 action8.(Cont)Bad alarm(2) To install new PC board A11 andidentificationA12, align sockets on A12circuitry.with pins on A11. Carefully(Cont)press boards together untilpins are fully engaged in soc-kets. Ensure that pins on A11are not bent or otherwise dam-aged. Turn PC board A11 soplastic ejector is toward top.Align board with guides at topand bottom of status processor.Slide board straight in until itcontacts receptacle at back ofprocessor. Then press firmlyon board until it seats com-pletely in receptacle.(3) Turn on switch S1 on power sup-ply. Depress TRANSMITTERRESYNC switch S2. Waitabout 5 minutes for system tostabilize. During 5-minutestabilization period, checkpower supply. Set multimeterto dc volts and connect nega-tive lead to chassis (ground).Connect positive lead to powersupply, TB2-3. Meter shouldindicate 20 ±1 vdc. Connectpositive lead to TB2-5. Metershould indicate 5 ±0.25 vdc.Connect lead to TB2-2. Metershould indicate 28 ±2 vdc.Turn mode switch to TEST/RESET and then to SECURE.k.Remove PC boards A11 and A12. Setmultimeter to dc volts and connectleads to J11-8 (+) and chassis (-).After expiration of time delay, ifmeter indicates 0 volts, replacePC board A9.(1) To remove PC board A9, turn offswitch S1 on top of powersupply. Place thumb or fingerunder board ejector and lift up5-108
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