A light emitting diode driving apparatus includes a first light emitting diode driving unit and a second light emitting diode driving unit. The support is substantially horizontally slidable between a first position in which the support supports a portion of the media sheet when the media sheet is printed and fed toward a media output area, and a second position in which the media sheet is free to move to the media output area. A power source transistor connects to the logic function circuit and receives a control signal that changes node voltages of the one or more logic transistors between an active mode and a standby mode.