Abstract: An image forming apparatus that facilitates combination of a monochromatic scanner or a color scanner with a monochromatic plotter includes a common image-processing unit for a monochrome and a color that processes monochromatic image data and color image data that is input via an interface from an exclusive reader for a color scanner or a monochromatic scanner. If the monochrome reader is connected, the image-processing unit processes the monochromatic image data and if the color reader is connected, the image-processing unit processes the color image data.

Abstract: A fixing controller that utilizes an induction-heating (IH) fixing technique and a 2-CPU fixing technique is provided to reduce the control workload on the main CPU, and to perform a fine control operation, taking advantage of the temperature flexibility that is naturally achieved by the IH fixing technique. In this fixing controller utilizing the IH fixing technique and the 2-CPU fixing technique, the main CPU that controls an entire image forming apparatus only transmits a power control signal as a control instruction to the IH CPU in an IH control circuit. Accordingly, in this fixing controller, IH control is performed by the IH CPU.

Abstract: A heater device includes a heating unit which includes a heating element that generates heat using an induction-heating method. A power supply part supplies a driving current to the heating unit. A first high-frequency component cutoff unit is connected to the power supply part. A switching unit controls the supply of the driving current from the power supply part to the heating unit. A second high-frequency component cutoff unit is connected to the switching unit. And a connection unit connects the first high-frequency component cutoff unit and the second high-frequency component cutoff unit.

Abstract: A fixing controller that utilizes an induction-heating (IH) fixing technique and a 2-CPU fixing technique is provided to reduce the control workload on the main CPU, and to perform a fine control operation, taking advantage of the temperature flexibility that is naturally achieved by the IH fixing technique. In this fixing controller utilizing the IH fixing technique and the 2-CPU fixing technique, the main CPU that controls an entire image forming apparatus only transmits a power control signal as a control instruction to the IH CPU in an IH control circuit. Accordingly, in this fixing controller, IH control is performed by the IH CPU.