TIMS showed Smoke Internal Alarm at car1521. Staff(YCK) checked and confirmed no signs of smoke / f ire / burning smell on exterior or interior of train. Train was escorted to terminal station. ~~~~~ TIMS showed Smoke Internal Alarm at car N check the above mention no FC...check no:1 internal smoke sensor dusty, service and air blow-done...security check and function test - okay...wait for few hours, okay. Done by: Saini and Asruddin. 02/02/2024.