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 alarmo.Turn mode switch to ACCESS. If meteridentificationindicates 20 ±1 vdc at S3, terminalcircuitry.2-3, replace mode switch S3.(Cont)(1) To remove mode switch, turn offswitch S1 on top of power sup-ply. Remove large hex nut thatsecures switch mounting brac-ket to inside of CU door. Re-move switch and mounting brac-ket together. Be careful not tolose switch arm because it isnot secured to switch shaft. Re-move spacer and lock from doorso no items will be lost. Re-move small hex nut and lockwasher that secures mountingbracket and switch stop toswitch shaft. Remove mount-ing bracket and switch stop.Note that mode switch is athree deck switch. Tag wiresand use a soldering iron of 50watts maximum to remove themfrom switch terminals.(2) To install new mode switch, use asoldering iron of 50 watts max-imum to connect wires to switchterminals. Slip mounting brac-ket and switch stop over switchshaft. Ensure that notch inmounting bracket fits over tabon switch body, and that thetang on switch stop engagesnotch in mounting bracket. Se-cure bracket and stop to switchwith lock washer and small hexnut. Insert lock through holein CU door; slip spacer overlock. Slip switch arm overswitch shaft. Ensure that armis aligned with tang on switchstop. Place large hex nut insideswitch mounting bracket; slipbracket over lock. Engageswitch shaft in lock. Tightenunit to secure switch.5-110
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