JP 500  (260-2950)       Operator Panel Functions      Faxback Doc. # 3638

LEDs

Power On   - lights when the printer is switched on, and remains lit until
             the printer is switched off

           - flashing slowly, indicates that the battery is low
             (approximately 5 standard pages can still be printed).

           - flashing rapidly, indicates that the battery is dead (battery
             must be recharged or replaced).

Economy/LQ - lit, indicates that the printer is in ECONOMY mode

           - off, indicates that the printer is in Letter Quality (LQ)
             mode.

On Line    - lit, indicates that the printer is ON LINE

           - off, indicates that the printer is OFF LINE

           - flashing slowly, indicates that there is no paper in the
             paper input tray (operator intervention required)

           - flashing rapidly, indicates a failure condition (technical
             intervention required).

At printer switch-on, after the correct execution of the mechanical reset,
the Power On and On Line LEDs will be lit.

If all the LEDs are flashing simultaneously, an operator error has
occurred.  If all the LEDs flash in sequence, the battery is under
recharge.

Keys

The key functions depend on the printer operating status.  When it is
switched on, the printer will be in one of the following conditions:

    Operating states

    ON LINE, with On Line LED lit.
    The printer is ready to receive data or data is being processed and
    printed.

    OFF LINE, with On Line LED off.
    State imposed by the operator, who has pressed the On Line key while
    the printer is operating.  Any printing operating is suspended;
    operator intervention is required to return the printer ON LINE (using
    the On Line key).

WARNING:  with Power On LED flashing slowly : state caused by low battery.

          with Power On LED flashing rapidly : state caused by dead
          battery.

          with On Line LED flashing slowly : state caused by lack of
          paper.

In ON LINE status (On Line LED lit):

Form Feed  - If there is no paper in the printer, commands the insertion
             of a sheet of paper to the Top of Form (TOF) position.

           - If paper is already present in the printer, causes its
             expulsion.

           - If there is data pending in the print buffer, causes its
             immediate printing, and the expulsion of the printed sheet.

           - If pressed together with On Line when the battery recharging
             feature is activated, causes the recharge operation to be
             terminated and the printer returns ON LINE.

Economy/LQ - If pressed for less than three seconds:  toggles the
             Economy/LQ print modes.  The change of print quality will be
             effective only after a subsequent FORM FEED command.

           - If pressed for more than three seconds:  moves the print head
             carriage to the head replacement position at the center of
             the carriage shaft.

On Line    - If pressed for less than three seconds; sets the printer in
             OFF LINE status and moves the print head carriage to its rest
             position at the physical left margin.  The On Line LED goes
             off and any printing operation is suspended.

           - If pressed for more than three seconds; enables the battery
             recharging feature; the LEDs start flashing in sequence, left
             to right.

           - If pressed together with Form Feed when the battery
             recharging feature is activated, causes the recharge
             operation to be terminated and the printer returns ON LINE.

In OFF LINE status (On Line LED off):

Form Feed  - As in ON LINE status.

Economy/LQ - As in ON LINE status.

On Line    - If pressed for less than three seconds:  Sets the printer in
             On Line status.  The On Line LED lights and any suspended
             printing operation will resume.

           - If pressed and held:

           - Allows the removal of a jammed page, which should be pulled
             carefully back into the paper input tray.  The key must be
             held until the paper is completely free.

(br/all-12/13/94)