| 摘要 |
PURPOSE:To prevent an abnormal image from being formed by using the frequency division signal of a reference oscillating frequency of an engine controlling CPU for a recorder as a driving pulse for a raster scanning motor, a driving pulse for carrying paper and a driving pulse for generating high voltage. CONSTITUTION:Signals (a) to (g) are generated by frequency-dividing a reference oscillation signal F generated by an oscillator 3 by the CPU 2. The raster scanning motor 4 is rotated in synchronism with the signal (a). A paper carrying motor 5 is rotated in synchronism with the signal (b). The signal (c) is converted and amplified to be outputted as a high voltage band sine wave. The signal (d) is superposed on the high voltage band sine wave output and impressed on an electrostatic charger 7. The signal (e) is impressed on a developing device 8 as a high voltage developing output l. The signals (f) and (g) are converted into DC high voltage (m) and impressed on a transfer device 9. Since the output of each signal is synchronized with the signal F, they do not interfere with each other and are accurately kept, thereby preventing the abnormal image from being formed. |
