TIMS showed Obstacle Detector fault alarm at front DT car when train doors were opened.SM(CCK) che cked and confirmed A4 train doors of front DT car were not f ully open with 4cm on both LHS and RHS train doors seen. Pax ~~~~~ TIMS showed Obstacle Detector fault alar     Checked Tims no FC for #3609-A4 door. Found #3609-A4 RHS door wobbling during operation due to main door rollers delaminated.Change out done ok.Service & clean guide ral & J-rail,no FOD found.Push/pull 5-5.5kg.Door mating gap-63.5mm.DCS distance from actuating plate-14.6mm,DLS,DCS ok. Conducted door static and door cyclic test ok. Done by Rizman/Firas.  15/06/23