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)g. (Cont)negative lead to chassis. Meter should in-dicate 20 1 vdc.b.Connect positive lead to S3, terminal 3-2.Meter should indicate 5 +0.25 vdc.c.Turn mode switch to SECURE. Connectpositive meter lead to S3, terminal 1-2.Generate a valid intrusion alarm by acti-vating a sensor. Meter should indicate18.5 to 21 vdc.d.If any of these indications are not correct,inspect wiring for broken or loose connec-tions. Resolder any bad connections.e.If wiring is good, replace mode switch S3.(1) To remove mode switch, turn offswitch S1 on top of power supply.Remove large hex nut that securesswitch mounting bracket to insideof CU door. Remove switch andmounting bracket together. Becareful not to lose switch arm be-cause it is not secured to switchshaft. Remove spacer and lockfrom door so no items will be lost.Remove small hex nut and lockwasher that secures mounting brac-ket and switch stop to switch shaft.Remove mounting bracket andswitch 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 a -soldering iron of 50 watts maxi-mum to connect wires to switchterminals. Slip mounting bracketswitch stop over switch shaft. En-sure that notch in mounting brac-ket fits over tab on switch body,and that the tang on switch stopengages notch in mounting bracket.5-34
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