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not ready. A state where you have
pressed Stop or an error or operator
intervention condition is occurring.
The printer can be not ready and
online or offline. See also offline and
online. Contrast with ready.
O
offline. Pertaining to equipment or
devices not under control of a
control unit or host processor.
Contrast with online.
online. (1) Stored in a computer
and accessible from a terminal.
(2) Pertaining to equipment or
devices under the direct control of a
control unit or host processor.
Contrast with offline.
operator panel. A functional unit
containing switches used to control a
printer or other data processing
units, or a portion of these devices
that may contain indicators giving
information on the functioning of the
system.
P
paper door. Used to provide
access to the printer for loading
paper and forms devices.
paper jam. A condition in which
paper forms have not fed properly
during printing and have become
wedged in the feeding or printing
mechanism, thus preventing the
correct forward movement of the
forms. A paper jam usually causes
one line to be printed over one or
more other printed lines.
parallel interface. An interface
where data is exchanged between
the computer and the printer one
byte at a time.
partial reset. An action that returns
the printer to the current
configuration values.
platen. A backing, usually
cylindrical, against which printing
mechanisms strike or otherwise
deposit ink to produce an image.
power cord. Cable that carries the
main power supply between a room
outlet and a machine.
power-on custom set. The custom
set containing the values used to set
the printer parameters when the
printer is turned on.
power-on self test. A series of
diagnostic tests that are run
automatically by a device when the
power is turned On (|).
power switch. A device that
makes and breaks the contact
between equipment and the main
electricity supply.
print head. That part of the printer
that prints data.
print head carrier. Used to hold
the print head and ribbon guide
posts as they slide along the platen.
print quality. The quality of printed
output relative to existing standards
Glossary X-5