Panasonic DP-1820P Service Manual

Also see for Workio DP-1520P: Quick guide Operating instructions

Contents

239SEP 2004Ver. 1.2DP-1520P/1820P/1820E6.3. Inverting Automatic Document FeederThe i-ADF automatically inverts two-sided original(s) for faxing or copying of the second side. This featureenables machines with a duplexer mounted to perform duplex copying.An i-ADF (Inverting Automatic Document Feeder) functions in a similar manner as the ADF (AutomaticDocument Feeder), with the main exception being the document eject path after scanning. The following isthe description of the main differences.For DP-1820E only.1. Switching from the ADF Mode to the i-ADF ModeAfter passing through the Read Point Sensor (131), the path of the original is switched over by theDuplex 2 Guide (2431), to the Exit Roller or to the Inverting Feed Roller (2428).For single-sidescanning, the Duplex 2 Guide is rotated clockwise by the Solenoid guiding the original to the ExitRoller. For double-side scanning, the Duplex 2 Guide is rotated counter-clockwise by the Solenoidguiding the original to the Inverting Feed Roller (2428).The Duplex 2 Guide moves only once, in thedirection according to whether a single or double-side scanning is selected (Copier or Fax) before theStart button is pressed. It will remain in this position until a different operation is performed (i.e. if thelast operation was 2-sided scanning, a single-side scanning is performed).2. Scanning the Front and the Back Side of an OriginalThe scanning of the Front and Back side of a 2-sided original is accomplished by means of the Duplex2 Guide (2431) and Inverting 1 Guide (2432).After the Front side of the original is scanned, the original is transported through the Duplex 2 Guide,through the Inverting 1 Guide (2432) that was rotated counter-clockwise by the Solenoid and is carriedbeyond the Inverting Feed Roller (2428) and upper Pinch Roller 1 (2130) into the Sub Tray (2209).The original is carried for a specified period of time after the trailing edge of the original triggers theDuplex Eject Sensor (131) and stops within 10 to 20 mm from exiting the rollers.Then, the Inverting 1 Guide is rotated clockwise by the Solenoid and the reverse rotation of the ADFMotor pulls the original back around the Feed 2 Roller (2517) and proceeds to scan the Back side ofthe original.After the Back side is scanned, the original is transported through the Duplex 2 Guide, through theInverting 1 Guide and is carried beyond the Inverting Feed Roller and lower Pinch Roller 1 (2130) thistime, into the Sub Tray, again stopping 10 to 20 mm from exiting the rollers.3. Eject by Reverse RotationFor the originals to stack properly, the above process repeats one more time. The Inverting 1 Guide isrotated clockwise by the Solenoid and the reverse rotation of the ADF Motor pulls the original backaround the Feed 2 Roller, however, this time the original is routed to the Exit 3 Roller (2515) and exitsinto the ADF Base.4. Sub TrayThe Inverting ADF system includes a Sub Tray (2209), which supports the originals during the ejectionmode of the double-side scanning operation.The Release Lever Plate grasps the originals and prevents them from being ejected into the Sub Tray.