1. The pickup motor (M5) rotates and the lifter moves up. Note that this printer uses the pickup motor
rather than a dedicated lifter motor.
2. When the Tray 2 media stack surface sensor 2 detects the stack surface of media, the lifter motor stops.
3. The lifter motor rotates again to lift the lifter when the Tray 2 media stack surface sensor 1 detects the
stack surface and then lowers during printing.
When a Tray 2 media stack surface sensors does not detect the stack surface within a specied time period
after the lifter motor starts rotating, the DC controller determines a lifter motor failure and noties the
formatter.
Tray 2 paper pickup
Following are the sequence of steps for the Tray 2 pickup operation.
NOTE: Tray 1 and Tray 2 are optimal for paper pickup when using special paper or media other than 20 lb
plain paper. For Tray 1, the printer increases the number of attempts to pick up a page, which increases the
reliability of successfully picking the page from the tray and decreases the possibility of a mis-pick jam.
HP recommends using Tray 1 or Tray 2 if the printer is experiencing excessive or reoccurring jams from trays
other than Tray 1 and Tray 2, or for print jobs that require media other than 20 lb plain paper.
1. The printer is turned on or Tray 2 is inserted.
2. The tray lift-up operation raises the lifting plate so paper can be picked up.
3. The pickup motor rotates when a print command is received from the formatter.
4. The Tray 2 pickup roller and Tray 2 feed roller rotate.
5. The Tray 2 pickup solenoid turns on at a specied time.
6. The Tray 2 pickup cam rotates.
7. As the pickup arm lowers, the Tray 2 pickup roller touches the surface of the paper stack.
8. One sheet of paper feeds into the printer.
Tray 2 multiple-feed prevention
The printer uses a separation roller method to prevent multiple sheets of print media from entering the paper
path.
The separation roller overruns if just one sheet of paper is picked. If two or more sheets are picked, only the
top sheet will be fed to registration and the multiply-fed sheets will be held at the pickup location by the
separation roller. This printer does not have an actively-driven separation roller.
56 Chapter 1 Theory of operation ENWW
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