1501-REPORTED APS FAULT DURING TRAIN PRE ~~~~~ 3501-REPORTED APS FAULT DURING TRAIN PREP.  1501 found FC 150 (Propulsion Lost Power For Control). TIMS showed APS isolated when MS handle at 3rd rail. Found CHS slight misaligned causing S/w plunger not depressed. Re-adjusted CHS position & fault cleared.  Sarma/Anand 44873