JP 500  (260-2950)           Troubleshooting           Faxback Doc. # 3643

If you have problems while working with the printer, check through the
following list, to see if you can find the cause of the problem.

    If a printer malfunction other than those indicated below occurs, or
    if, after executing the suggested corrective action, the problem
    persists, call your dealer or the Technical Assistance Service.

Installation

1.  Missing or damaged parts.

    Contact your dealer immediately.

2.  Printer does not switch on.

No power supply (the Power On LED is off).

    Check that the printer is switched on.

    Check that the AC/DC adapter is connected properly both to the printer
    and to the mains socket.

3.  No initial reset.

At switch-on, the print head carriage does not move.

    Check that the carriage path is free of impediment.

    Try switching the printer off and then on again.

    If the On Line LED is flashing rapidly, there is a failure on the
    mother board; call the technical assistance service.

4.  Print test did not run

    Switch off the printer, then switch it on again, remembering to hold
    down Form Feed until the mechanical reset is completed.

    If the carriage does not move, check that its path is not obstructed.

    If the On Line LED flashes slowly: there is no paper in the printer;
    load up to 15 sheets into the paper input tray and press the Form Feed
    key on the operator panel.

5.  Problems with connection to host.

    Check that your interface cable is of the correct type.

    Make sure you have fixed the interface connectors properly both to the
    printer and to the host.

    Check that you have configured your application correctly.

Paper

    Always use paper in perfect condition and within the specifications
    defined.

1.  No paper.

    If, on a print command, there is no paper to load in the printer, the
    printer goes into WARNING status and the On Line LED flashes slowly.

    To clear this condition, insert up to 15 sheets of paper into the
    paper input tray and press the Form Feed key on the operator panel.

2.  paper does not load

    Check that the size and weight of the paper used are within the limits
    allowed.

    Make sure the paper is not feeding in crookedly.

    Paper jamming - point 3 in this section.

    If your application program does not send a paper feed command,
    position a sheet of paper in the paper input tray and press the Form
    Feed key on the operator panel.

3.  Paper jams or tears.

    The most common causes of paper jamming in the paper input tray is the
    addition of paper when the tray is not empty and/or the incorrect
    loading of paper.  When adding paper to the paper input tray or after
    removing jammed paper, ALWAYS remove any paper already in the paper
    input tray and reload it all as a single pack.

    Set the printer OFF LINE (On Line LED off).

    Press and hold down On Line while pulling the jammed paper carefully
    back into the paper input tray.

    DO NOT pull the jammed paper out through the front of the printer as
    this can damage the print mechanism.

    Check that the paper output tray is not overloaded (capacity 10
    printed sheets)

    It is a good idea to remove any printed sheets from the paper output
    rack before starting a new printing operation.

    Do not attempt to print on small adhesive labels attached to larger
    size glossy paper (e.g. A4 format).  This type of label tends to
    detach during printing and recovery from inside the printer is
    somewhat arduous.

4.  Incorrect stacking

    Too many sheets in input and/or output tray.

    The input tray can contain up to 15 standard sheets; the output tray
    can contain up to 10 printed sheets.

    Heavily printed sheets tend to curl and may not stack correctly.  They
    may also stain the rear of the page stacked over them, as they require
    longer to dry.  Always remove heavily printed sheets from the output
    tray as soon as they are expelled from the printer.

Printing

1.  Printer does not print/receive data.

    Check that the printer is switched on and On Line (the Power On and On
    Line LEDs on the operator panel must be lit).

    Check the physical (cables) and logical (application and driver)
    connections between the printer and host.

    Check that host system is switched on.

    If the carriage does not move and the On Line LED flashes rapidly,
    switch the printer off and then on again.  If the On Line LED
    continues to flash rapidly, call the Technical Assistance Service.

    Check that you have removed the protective film from the print head.

    If the On Line LED flashes slowly, check that paper is present and
    that it loads correctly.

2.  Printing stops.

    If the On Line LED flashes slowly, check that paper is present and
    that it loads correctly.

    If there is no paper in the printer, place up to 15 sheets of paper in
    the paper input tray and press the Form Feed key on the operator
    panel.

3.  Printed characters are faint.

    Execute the PRIME operation to clear the print head nozzles.

    Make sure there is no paper in the printer.

4.  Printing with missing dots

    Execute the PRIME operation to clear the print head nozzles, or
    replace the print head.

    Clean the electrical contacts on the print head and those in its
    chamber.

    As a last resort, hold the printer vertically while executing the
    PRIME operation.

5.  Poor print quality

    Execute the PRIME operation to clear the print head nozzles.

    Try printing on the other side of the paper.

    Make sure you are using good quality paper.

(br/all-12/13/94)