TC reported rear DT car one of the traindoor not proven closed. TC recycle once to clear fault. Sta ff(RFP) checked and confirmed all saloon door at rear DT carnormal. TC reported rear DT car one of the train door not p  ~~~~~ 3630 TC reported one train door not proven closed. TC recycled once to clear fault. Staff(RFP) confirmed all saloon doors at 3630 car normal.     3630 B2 door LHS/RHS rollers found worn-out. Replaced the rollers. Cleaned the J-rail/guide rail. Checked weather strip condition, FOD & door static timing - OK. Function test door operation - OK.  Anand/Sugu/Kamarul/Lee PT 45057