ADF Duplex Operation M The user inputs the duplex command from the touch screen on the Front Panel. M Frontside data is the same as simplex operation. M Both the backside and frontside are copied simultaneously by two Charge Coupled Device (CCD) arrays on the HP Digital Copier. (A Charge Coupled Device is a miniature photometer that measures light and converts the measured value to analog voltage.) M Backside data is copied and stored into the backside image buffer residing on the copy engine. G After the frontside buffer has been sent to the Copy Processor, the data stored in the backside buffer is then sent to the Copy Processor.
Flatbed Operation M The user inputs commands (through the touch screen and buttons) which are then sent to the Copy Processor Board. M The Copy Processor displays the appropriate screens on the copy module’s LCD based on the user’s inputs. The screens displayed are based on the screens downloaded from the printer. M The user presses the S TART button and the copy module looks for paper loaded in the ADF. If no paper is found, the copy module receives the flatbed read command. Note The user interface is identical from ADF copy to flatbed copy.
M The Carrier Unit reads the white reference and then moves to the right to read from the flatbed glass and proceeds in steps for user specific paper length. M The copy engine scans the image (see page 249). G The Carrier Unit returns to the home position and the HP Digital Copier awaits the next command. C4265-90907 ADF Duplex Operation 247