image data is merely generated to the facsimile circuit unit 1006 in place of the file circuit unit 1005 and the other operations are substantially the same as those in case of generating the image data from the file circuit unit 1005 the case of facsimile transmitting the filed original will now be described after the setting operations for various files and facsimile were performed by depressing the copy start key the above various set data is sent from the image forming apparatus 1000 to the cpu 1010 through the selector 1002 by the communication line 1013 the set data is similarly sent from the cpu 1010 to the file circuit unit 1005 and the facsimile circuit unit 1006 by the communication line 1013 on the basis of the set data the file circuit unit 1005 and the facsimile circuit unit 1006 perform the setting operations according to the set data and transmit the preparation completion signals to the cpu 1010 when the cpu 1010 receives such signals the cpu controls the output selector 1009 so as to allow the image data to flow in the direction from the file circuit unit 1005 to the rotation processing circuit 1003 further the cpu 1010 controls the selector 1004 and the input selector 1008 so as to allow the image data to flow from the rotation processing circuit 1003 to the facsimile circuit unit 1006 through the selector 1004 the series of routes of the image data are determined in this manner the cpu 1010 transmits the image output preparation completion signal to the file circuit unit 1005 when the cpu 1010 receives such a signal the cpu starts the image.