| 摘要 |
PURPOSE:To eliminate mis-copying, etc. when an operation for indicating magnification is neglected and to improve the practicability in terms of cost and time by returning a variable power mode to an unmagnification mode when there is no instruction for forming an image within the specified time after the selection of the variable power mode. CONSTITUTION:When the operator pushes a copy botton after pushing a reduction switch PB2, a copy signal attains a level 1 and a relay K1 turns on to open a contact K1-1 and therefore the change-over inhibition state in which a storage means relay K2 does not operate even if an unmagnification switch PB1 is pushed is attained. The copy signal attain a level 0 upon completion of the copying. Then the relay K1 turns off and inhibition state is released; at the same time, the contact K1-2 opens and a capacitor C1 is charged through resistors R2, R3 which are timer means. The charge of the C1 is discharged and a voltage is generated in a resistor R5 after the prescribed time when the voltage of the C1 attains a prescribed voltage. This voltage is inputted to the coil S of the storage means relay K2 after amplification Q2, Q4, by which the contact K2-1 is changed over to the side (a) and the unmagnification mode is set. |
