A printed circuit board includes multiple receiving components for respectively receiving control signals and a transmitting component coupled to the receiving component through multiple leads. Given that the lengths of the leads may be different to each other, the control unit generates the control signals to the leads according to the information about the leads, and firstly delivers at least one of the control signals to the corresponding receiving component(s), and then delivers the remaining control signals to the receiving components after a predetermined time. Furthermore, a method for controlling a signal sequence for the printed circuit board includes generating multiple control signals depending on the information about leads and delivering at least one of the control signals to the corresponding receiving component and delivering the remaining control signals to the remaining receiving components after the predetermined time.