The present invention relates to a delivery system for vaporizing and delivering vaporized solid and liquid precursor materials at a controlled rate having particular utility for semiconductor manufacturing applications. The image forming apparatus may include a container having an inlet configured to receive waste toner, the container defining a storage area having a horizontal dimension greater than a vertical dimension. At some point during the first communication, a transition to a second service option, such as an asynchronous data service option, is initiated. For this reason, when the lock current flows, conduction between a drain terminal and a base terminal of the MOSFET is released and a drive current of the motor is cut off.