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(1) To remove PC board A12, turn offidentificationswitch S1 on top of power sup-circuitry.ply. Place thumb or finger un-(Cont)der board ejector on A11 andlift up until board pops out ofreceptacle at back of statusprocessor. Then grasp PC boardand pull straight out. Carefullypull A11 and A12 apart.(2) To install new PC board A12, alignsockets on A12 with pins onA11. Carefully press board to-gether until pins are fully en-gaged in sockets. Ensure thatpins on A11 are not bent orotherwise damaged. Turn PCboard A11 so plastic ejector istoward top. Align board withguides at top and bottom ofstatus processor. Slide boardstraight in until it contacts re-ceptacle at back of processor.Then press firmly on boarduntil it seats completely in re-ceptacle on P1.e.If meter indicates 0 volts on bottom pin,remove PC board A11 and connectpositive meter lead to J11-17.(1) If meter indicates 0 volts, turn offswitch S1 on power supply.Set meter to ohms and connectleads to power supply TB2-3and J12/P1 pin 36, and then toJ12/P1 pin 36 and J11-17.Meter should indicate 0 ohms.(2) If meter does not indicate 0 ohms,inspect wires for broken orloose connections. Resolderany bad connections on P1.5-102
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