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2-12 Service Manual
4227-X00
Auto Sheet Feeder (ASF) Service Check
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.
• Auto Sheet Feeder must be selected in the display menu.
Continuous forms can be used with the ASF installed by moving the
paper select lever to continuous forms and pressing Start 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 of the printer’s right side frame.
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 Paper Handling Options Menu, the
cut sheet paper drive reverses itself for a short distance during
paper loading. This engages the clutch and engages the paper pick
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 pick rollers. The
sheet is then fed to the print line by the ASF’s upper and lower feed
rollers and the printer’s lower feed rollers. Although the ASF pick
rollers continue to turn as the paper is fed, their drive is disengaged
and they are actually being turned by the paper.
FRU Action
1 Paper Select
Sensor
With the paper select lever in the cut sheet
position, do the following:
• Try to load a sheet with Load/Unload.
(This button should not work)
• If the paper loads go to the
“POST Service
Check” on page 2-24
.