| 摘要 |
<p>PURPOSE:To facilitate the correction of print position shear on paper by using a sensor so as to detect a laser beam scanned by a polygon mirror, retarding an outputted horizontal synchronizing signal in response to the setting of a print position setting device and generating a pseudo horizontal synchronizing signal. CONSTITUTION:The laser beam scanned by the polygon mirror 7 is detected by the sensor 2 and the outputted horizontal synchronizing signal 21 is retarded by a time set by a print position setting device (dip switch) to generate a pseudo horizontal synchronizing signal 33, which is sent to a controller 4. Then the controller 4 sends a video data 41 synchronously with the pseudo horizontal synchronizing signal 33. Thus, the mount position of the sensor 2 or the dispersion in the paper run position is corrected without revising the timing sending the video data 41 from the horizontal synchronizing signal 21 at the controller side 4.</p> |
