Lexmark 4I3 - Manual (Page 186)

Auto Sheet Feeder Device (F4)
F4
F4
The Auto Sheet Feeder Device (F4) is available for all models of the
4230 Printer.
The device has an F4 by itself in the upper left corner of the device.
This device is used for automatic feeding and printing of cut forms.
It can feed paper from one of three bins or a manual insertion slot.
The Auto Sheet Feeder Device (F4) consists of two parts: (1) a
forms transport device (shown above) that mounts inside your
printer, and (2) a sheet feeder that sits in front of the printer on the
same table.
See “Setting Up Your 4230 Printer with ASF” in IBM 4230 Printer
Auto Sheet Feeder General Information for information on setting up
and operating this device.
3-22 User’s Guide