TIMS showed Smoke Internal at car 1507.Staff(BDK) checked and confirmed no signs of smoke / fire / burning smell on exterior or interior of train. Train was es corted to terminal station. TIMS showed Smoke Internal at ca ~~~~~ 1507 TIMS showed Smoke Internal. Staff(BDK) confirmed no signs of smoke/fire/burning smell on exterior or interior of train. Train was escorted to terminal station.  1507 FC 720 (Smoke Internal). Swapped FCP from #1507 to #2507 for monitoring. Function check - OK. OPS 20 raised to to c/o smoke internal detector.  Sarma/Alan/Lee PT/Kamarul 45458 FCP S/N : (after swapped)    #1507 : 035 #2507 : 131 BSD: 1507 #2 To C/O Internal Smoke Detector  Replaced  1507 no.2 internal detector due to smoke detector dirty. Function check and security check ok. notif:2609708 Done by Saini/Morgan 45463