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2-14 Service Manual
24xx
Auto Sheet Feeder (ASF) Service Check
Note: Be sure the sheet feeder is enabled in the Setup Mode. Go to
“Setup Mode” on page 1-2.
Auto Sheet Feeder Principles of Operation
The Auto Sheet Feeder (ASF) feeds into the cut sheet paper entry
throat. To use the ASF:
• The paper select lever must be set to cut sheet.
• The Auto Sheet Feeder must be selected in the Setup menu.
Continuous forms can be used with the ASF installed by moving the
paper select lever to continuous forms and pressing Start/Stop to
feed the continuous forms to the first print line.
The ASF contains no electrical parts. It is driven from the gear on
the inside right side frame of the printer.
The combination lock mechanism is a clutch that causes the ASF
pick rollers to feed only one sheet of paper at a time. When Auto
Sheet Feeder is selected on the Setup Menu, the cut sheet paper
drive reverses itself for a short distance during paper loading. This
reversal engages the clutch and thus engages the paper picker
rollers, which feed the top sheet from the cut sheet paper stack. The
sheet is fed about 5 inches (125 mm) and the paper path briefly
reverses again; this disengages the clutch and the picker rollers. The
sheet is then fed to the print line by the upper and lower feed rollers
of the ASF and the lower feed rollers of the printer. Although the ASF
picker rollers continue to turn as the paper is fed, their drive is
disengaged and they are actually turned by the paper.