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 action1.(Cont)d.(Cont)(S3), terminal 2-1, and negative lead tochassis (ground). Meter should indicate20 1 vdc.p.If meter indicates less than 0.5 vdc,replace mode switch.(1) To remove mode switch, turn offswitch S1 on top of powersupply. Remove large hexnut that secures switch mountingbracket to inside of CU door. Re-move switch and mounting brackettogether. Be careful not to loseswitch arm because it is not securedto switch shaft. Remove spacer andlock from door so no items will belost. Remove small hex nut andlock washer that secures mountingbracket and switch stop to switchshaft. Remove mounting bracketand switch stop. Note that modeswitch is a three deck switch. Tagwires and use a soldering iron of50 watts maximum to remove themfrom switch terminals.(2) To install new mode switch, use asoldering iron of 50 watts maxi-mum to connect wires to switchterminals. Slip mounting bracketand switch stop over switch shaft.Ensure that notch in mountingbracket fits over tab on switchbody, and that the tang on switchstop engages notch in mountingbracket. Secure bracket and stopto switch with lock washer andsmall hex nut. Insert lock throughhole in CU door; slip spacer overlock. Slip switch arm over switchshaft. Ensure that arm is alignedwith tang on switch stop. Placelarge hex nut inside switch mount-ing bracket; slip bracket over lock.Engage switch shaft in lock. Tightennut to secure switch.5-24
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