Service Manual
6-9
Troubleshooting
6
Paper-pick errors
Paper-pick errors occur when the media in the paper tray mis-picks or the
printer double-picks two sheets of paper.
1.
Clean the interior of the paper tray. When installing paper, push the
stack of paper down until the tray's lift-plate locks to the bottom of the
tray. This prevents the top sheet of paper from being mis-positioned
as the tray is inserted in the printer.
2.
Fan the media before inserting it in the paper tray.
3.
Ensure that the media fits properly in the tray. With one edge of the
stack of paper flush against the tray rail, there should be a small gap
between the opposite edge of the stack of paper and the opposite side
rail.
4.
Check that the pick roller is being rotated. If it is not, go to the topic
“Checking the paper-feed motor and drive train” on page 6-11.
Otherwise, go to Step 5. In their starting position, the pick rollers' flat
side should face downward.
5.
Clean the pick rollers. Paper dust can coat the pick roller and affect its
ability to grip the paper and pull it out of the tray.
6.
If the printer picks the paper but it stops feeding while the paper is in
the paper-feed unit, check the hex-encoded error indicators on the
front panel by momentarily pressing the
TEST
button. (The later topic
“Displaying error codes on the front panel” on page 6-18 explains how
to interpret error codes.)
■
Error code 23 and 34 are mispick errors.
■
Error code 23 can also be caused by the front door of the Lower Tray
Assembly not being fully closed.
■
Error code 26 is caused by the paper clamp improperly clamping the
media; clean the clamp.
■
Error code 27 is caused by a paper-pass error. Check for media
remaining in the paper path or a defective sensor.
Run the Chapter 9 procedure “Switch and interrupt sensor checks” on
page 9-12 to test paper pass sensors 1 and 2."
7.
Lubricate the pick roller and alignment roller clutches. Refer to the
Chapter 7 topic “Lubrication.”
8.
Inspect the wiring harness leading to the paper-feed module for nicks,
cuts or crimped wiring.
9.
Inspect the paper-feed module for obstructions.