A.    If the printer does not show up in the Chooser, then the cable or port
      on the computer may be defective.

      1.    Try another cable.

      2.    If this is the only device connected to the computer, then the
            port on the computer may be defective. Try connecting to another
            computer.

      3.    If another output device is available, try connecting it to the
            computer.  If it does not show up in the Chooser,  there might be
            a problem with the operating system and/or driver. Contact the
            software manufacturer for assistance.

      4.    If still unsuccessful getting the 6603PS/6613PS to show up in the
            Chooser, then either there is a software problem with the
            software driver, its installation, or the port on the printer may
            be defective. If the port on the printer is defective, the
            printer requires service.

B.    Check the firmware revision of the printer. Turn off the printer, wait
      3 seconds, and then turn the power back on. The printer will display
      the firmware revision.

      1.    If the firmware revision is 232.8, the printer will not work with
            LaserWriter driver versions from 7.1 to 7.2. The usual error
            reported to the Macintosh is: POSTSCRIPT ERROR: INVALID ACCESS...
            after which the printer disappears from the Chooser.  To remedy
            the problem,  use either:

            a.    The System 7.0 LaserWriter driver that came with the
                  printer.

            b.    The LaserWriter 8.x driver.  This driver will require a
                  version 4 PPD file. The LaserWriter driver 8.x driver and
                  versions 3 and 4 PPD files are available on the CalComp 
                  Web Site http://www.calcomp.com. The file name is CMPS-MAC.HQX.
		  If only the PPD files are needed, then download file CMPS-PPD.HQX.
                  Use the MacBinary file transfer option when downloading
                  files for the Macintosh.  The file, once downloaded, is
                  self-extracting. Simply double-click on the file name icon
                  and it will create the documentation and driver files.

      2.    If the firmware revision is 233.1 or 260.1:

            a.    If using System 7.5, check the following:

                  i.    Determine if a QuickDraw GX driver is being used:

                        i.1.  Examine the current driver being used in the
                              Chooser.

                        i.2.  If it is called LaserWriter GX, then it is a
                              QuickDraw GX driver.

                  ii.   If a QuickDraw GX driver is being used, then it must
                        be disabled or uninstalled.

                  iii.  Use the LaserWriter 8 driver that comes with the
                        Macintosh. This driver will require a version 4 PPD
                        file. The LaserWriter driver 8.x driver and versions
                        3 and 4 PPD files are available on the CalComp Web Site
			http://www.calcomp.com. The file name is CMPS-MAC.HQX. If
                        only the PPD files are needed, then download file
                        CMPS-PPD.HQX.   Use the MacBinary file transfer
                        option when downloading files for the Macintosh.  The
                        file, once downloaded, is self-extracting. Simply
                        double-click on the file name icon and it will create
                        the documentation and driver files.

      3.    If the problem is not resolved here, then the problem requires
            further research.