HP 8550 Service Manual - Page 263

Reversal operation Reversal may be either from the first side to the second side, or from the second side to the first side. (Since the same mechanism is involved, the discussions herein will be on reversal from the first side to the second side.) l Picking up for the first side An original is moved from the document tray to the copyboard glass. l Reversal/feeding The feeding belt is rotated clockwise to feed the original off the copyboard glass and to the reversing roller. l Reversal/delivery switching The paper deflecting solenoid (SL3) is turned on to open the paper deflecting plate so that the original is moved back to the copyboard glass, reversing the original. When the second side of the original is set on the copyboard glass, the scanner starts to move forward. While the scanner is moving in reverse, the original is reversed once again so that its first side is set on the copyboard glass. When the first side of the original has been copied, the original is moved for delivery. Figure 151. Picking up for the first side Figure 152. Reversing from the first side to the second side EN ADF 261