The invention describes an apparatus and method for detecting a short circuit to a battery voltage when driving a piezoelectric element, for example, used as an actuator in a fuel injection system of an internal combustion engine. Unjamming is allowed to be performed by separating the apparatus at a boundary between the first sheet feeding path and the second sheet feeding path, and by pulling out the first sheet feeding path. metal carbonates, The carbonate loaded slurry is then separated into an aqueous phase and a solid phase; and the aqueous phase is supplied to a precipitation unit for precipitating alkaline earth metal carbonates. A mirror layer for reflecting towards the diffractive color filter at least part of light transmitted through the diffractive color filter are provided beneath the diffractive color filter. Top surfaces of the light converging elements of the second light emitting unit row are disposed on a second surface. If the rotation is required, the reading operation is performed in such a manner that the line density in the secondary scanning direction in the reading operation will become the line density in the principal direction after the rotation so that no degradation in the resolution and processing efficiency occurs.