HP Laserjet Q5421A Manuel D'installation page 7

On the inside of the door, open the small
cover next to the feed roller.
Locate a second feed roller at the top-
center inside the 1,500 sheet feeder.
All manuals and user guides at all-guides.com
Push the blue latch that is on the side of the
feed roller away from the roller shaft to
unlock the roller. Slide the roller off the shaft.
Push the blue latch that is on the left side of
the roller (callout 1) away from the roller
shaft to unlock the roller. Slide the roller off
the shaft (callout 2).
NOTE It might be necessary to rotate the
roller in order to unlock the latch. The 1,500-
sheet feeder separation roller is the one
closest to the front of feeder. Do not remove
the 1,500-sheet feeder pick-up roller located
behind the separation roller.
NOTE
7
Slide the new feed roller onto the shaft.
NOTE It is important that this roller locks into
place. If it does not, make sure that the roller
is properly oriented and that the round, black
spacer next to the roller is properly
positioned around the pin in the shaft.
Slide a new feed roller onto the shaft and
rotate the roller until it locks into place.
NOTE It is important that the roller locks into
place.