- Hewlett-Packard QMS 1660 Print System Reference Manual

If the current print system software is not functioning, you must con-
nect your Macintosh to the printer’s serial port to reinstall the system
software. The downloading procedure will not work over the LocalTalk
or CrownNet interface in this case.
» Note:
This downloading procedure requires a connection from the
Macintosh’s serial port (either the modem or the printer port) to the
printer’s serial port. The cable must have a DIN-8 female connector
on the Macintosh end. It must also must be wired as a null modem or
it must have a null modem adapter. The type of connector for the
printer’s serial port end of the cable depends on the type of null
modem assembly. Your Macintosh vendor can provide you with this
equipment, or you can use the “Cable Pinouts” section of appendix B,
“Technical Specifications,” if you want to make your own cable.
1 Connect the Macintosh to the printer’s serial port.
You can use either the printer or modem port on the Macintosh.
However, the modem port provides the fastest download.
» Note:
To use the printer port you must first disable AppleTalk in
the Chooser.
2 Turn on the printer.
3 When the control panel indicators stop flashing (the mes-
sage window will remain blank since the printer is non-func-
tional), send the new system software file SYSTEM.DL to the
printer.
a At the Macintosh, double-click the SystemLoader icon.
b In the dialog box that appears, make sure the correct
download port is selected, and then choose the Send button
to start the download.
The downloading process takes about 10 minutes, depend-
ing on the size of the file and the speed of your Macintosh.
The Ready indicator blinks as the new system image is writ-
ten to flash ROM. After the updated system software has
been written to flash ROM, the message Download Com-
plete! appears on the Macintosh screen, the printer