TIMS showed Smoke Internal at Front M1 car. Staff(CTH) checked and confirmed no signs of smoke / fir e / burning smell on exterior or interior of train. Train wa s escorted to terminal station. TIMS showed Smoke Internal a ~~~~~ #1537 SMOKE INTER L CHECK AND FOUND SMOKE EXTER L ACTIVATED FC721.SMOKE EXTER L DETECTOR C/O OK.FUNCTION TEST FAULT STILL PERSIST.FURTHER CHECK MEASURE NO OUTPUT VOLTAGE ON SMOKE  EXTER L DETECTOR.SWAP FIRE CONTROL PANEL FROM #1537 S/N 117 TO #2537 S/N 120 FAULT TRANSFER.OPS20 RAISED TO C/O FIRE CONTROL PANEL ON #2537 WHEN SPARE AVAILABLE.METTA/RAM/HAKIM 19.10.2023 SMOKE DETECTOR S/N NIL NOTIFICATION 2533905  #2537 FIRE CONTROL PANEL C/O DONE.FUNCTION TEST OK. GANESAN/LEONG/RAGHU/SHAHRIE 19.10.2023 2537 FIRE CONTROL PANEL S/N OLD 117     NEW 172 NOTIFICATION 2534062