Returns or changes the list of locked input trays. The
printer only pulls media from a locked input tray when
the input tray is specifically requested by the print
job.
Additional information:
The HP LaserJet 2100 Series will pull paper from a
locked tray if that tray is specifically requested or if
the user presses the Go button on a paper mount override
and there is no paper available in an unlocked tray.
There must always be at least one unlocked tray. When
no optional lower cassette is installed and one tray is
locked, an attempt to lock the other tray will result in
the first tray unlocking. When the optional cassette is
installed and two trays are locked, an attempt to lock
the third will fail with a return status of
<badValue> and a return value
containing the collection of previously locked trays.