After he refused to leave, MTA workers called the police and shut down power to the tracks as they responded. J trains were suspended between the Broad Street and Chambers Street stations during the response, according to a post from the subway’s Twitter account. An hour and a half later, police managed to take the man into custody and trains in the station resumed service. EMS took the man to Bellevue Hospital for a psychiatric evaluation, police and officials said. In Brooklyn, at about 10:20 a.m., another apparently mentally ill rider banged on the train operator’s door of a 4 train at the Crown Heights-Utica Avenue station, officials said.