Lexmark 25**-100, Service Manual

Page: 45 / 188

Diagnostic information
2-25
25XX-100, -110
Paper feed service check
Note: If paper creases or jams frequently, verify that the paper is
neither too thick nor thin. If necessary, refer the user to the User’s
Guide for specifications of acceptable papers.
If the paper does not stop in the correct location, see “Paper
Present sensor service check” on page 2-24 and the “Top-of-
forms service check” on page 2-35 .
FRU/symptom Action
1 Auto Sheet
Feeder If the Auto Sheet Feeder is installed, remove it.
Enter the Setup Menu, and reset ASF to off.
Verify that the printer works correctly without
the ASF installed.
If the printer fails only with the Auto Sheet
Feeder installed, go to
“Auto Sheet Feeder
(ASF) service check” on page 2-16 .
2 Gear train Remove all paper from the printer.
Press FormFeed several times, and examine
all rotating parts to find the problem.
The feed rollers and pinch roller should all be
clean and in good condition and should all
rotate when pressing
FormFeed .
3 Paper Select lever Be sure the selector lever alternately engages
and disengages the tractor gear and the ASF
drive gear.
Check the operation of the following parts as
you move the Paper Select lever:
• The tractor gear engages correctly in the
continuous forms position.
• The tractor belts are in good condition and
rotate correctly.
• The pinch roller shafts move downward as
the lever moves to the cut sheet position.
• The paper separator moves upward as the
lever moves to the cut sheet position.