| 摘要 |
PURPOSE:To make a fine adjustment accurately by turning on and off a display device during the fine adjustment and displaying the position of a picture, and stopping the operation when a switch other than a switch related to the fine adjustment is operated. CONSTITUTION:When a fine adjustment mode is entered by turning on a switch SW1, its signal is inputed to a retrieval control circuit 103 to inhibit the transmission of a general retrieval control signal from the circuit 103 to a control circuit 104 for a film driving part. At the same time, an oscillation circuit 101 starts oscillating by receiving the signal from the switch SW1, and the display device 105 starts turning on and off to inform an operator that the fine adjustment mode is effective. Further, a signal ''1'' is inputted to AND gates A1 and A2 by the closure of the switch SW1; and the A1 receives a signal from the ''+'' key of an SW2 and the A2 receives a signal from the ''-'' key of an SW3. The switch SW2 is depressed to send a signal out of the gate A1 and a fine adjustment control circuit 102 is put in operation to move forth or back a film finely by the film driving part control circuit 104 according to a signal from the circuit 102. |
