Troubleshooting Procedures

TM 5-6350-264-14&P-10 NAVELEX EE 181-AA-OMI-110/E121 C-9412 T.O. 31S9-2FSS9-1-10 Table 5-2. Troubleshooting Procedures - Continued Trouble Probable cause Corrective action 1. (Cont) d. (Cont) (S3), terminal 2-1, and negative lead to chassis (ground). Meter should indicate 20 1 vdc. p. If meter indicates less than 0.5 vdc, replace mode switch. (1) To remove mode switch, turn off switch S1 on top of power supply. Remove large hex nut that secures switch mounting bracket to inside of CU door. Re- move switch and mounting bracket together. Be careful not to lose switch arm because it is not secured to switch shaft. Remove spacer and lock from door so no items will be lost. Remove small hex nut and lock washer that secures mounting bracket and switch stop to switch shaft. Remove mounting bracket and switch stop. Note that mode switch is a three deck switch. Tag wires and use a soldering iron of 50 watts maximum to remove them from switch terminals. (2) To install new mode switch, use a soldering iron of 50 watts maxi- mum to connect wires to switch terminals. Slip mounting bracket and switch stop over switch shaft. Ensure that notch in mounting bracket fits over tab on switch body, and that the tang on switch stop engages notch in mounting bracket. Secure bracket and stop to switch with lock washer and small hex nut. Insert lock through hole in CU door; slip spacer over lock. Slip switch arm over switch shaft. Ensure that arm is aligned with tang on switch stop. Place large hex nut inside switch mount- ing bracket; slip bracket over lock. Engage switch shaft in lock. Tighten nut to secure switch. 5-24