| 摘要 |
PURPOSE:To correct the drift of a frame erasure position and to insure the appearance of a recorder picture against being spoiled by permitting a setting means to set a correction amount correcting the drift of the peripheral part of a picture area. CONSTITUTION:When an adjustment amount to advance or delay the timing of opening and closing a relay R in turning ON and OFF a developing bias is inputted through a keyboard 24, said amount is stored in a RAM 19 backed up by a battery 23. When a mode changeover switch 20 shows printing in a frame position adjustment mode, printing is executed several times by increasing and decreasing the adjustment amount through the keyboard 24. Then an appropriate adjustment amount can be set. At that point, the switch 20 is changed over to a normal mode. Thus, by advancing or delaying the timing of turning ON and OFF the relay R by the adjustment amount, the drift of a frame position can be eliminated in a normal printing. |
