 The fleet operated on the Noda Line, but were gradually replaced from 1997 by six-car 8000 series EMUs displaced by the arrival of new 30000 series EMUs on the Tobu Isesaki Line, with the entire fleet withdrawn from service by the start of the revised timetable on 19 October 2004.The 6-car 5070 series sets were formed as follows.The 5270 cars were fitted with two pantographs, and the 5570 cars were fitted with one pantograph.