Figure 1-26 Pickup, feed, and delivery blocks Face-down delivery Fixing/delivery unit Face-up delivery Pickup/feed unit Pickup-and-feed block The following functions take place in the pickup-and-feed block: ● Detection of media ● Detection of media-size ● Detection of media entering the paper path from Tray 1 or Tray 2 ● Lifting of the Tray 2 paper plate ● Prevention of multiple-feeds ● Correction of page skew When it receives a print command from the host computer, the DC controller PCA turns on the feed motor (M101) power. The motor drives the Tray 2 pickup, feed, and separation rollers. The drum motor power also turns on. The laser/ scanner motor power turns on.
The DC controller PCA then activates the feed clutch (CL101) to rotate the feed roller. The Tray 2 pickup solenoid is activated (SL101) and the pickup arm descends. The pickup roller touches the media and a sheet is fed into the product. The separation roller prevents multiple sheets of media from being fed at one time. As the pre-feed sensor (PS102) detects the media, the dc controller PCA turns off the clutch, which stops the media. When the DC controller PCA detects that the laser/scanner is ready it activates the feed 32 Chapter 1 Theory of operation ENWW