TC reported TIMS showed obstacle detected at front DT car 3628 'A2' train door. TC feedback train do or did not opened at DBG. Subsequent train door opened at SO M. Staff (ORC) checked and confirmed train door did not open ~~~~~ #3628 A2 door wobbly and slight stuck due to RHS outer roller damage. Replace iron roller both side push/pull resistance pass. Do normal check and cleaning done. J rail and guide rail. Check FOD any door rubbing move ok. DLS red mark - ok. DLD ok, DCS ok. Door mating 63.8mm. Door opening/closing several time and static test pass. Done by: Haslan and Fauzi