3-38 Maintenance
CadJet 3D Service Manual
Clear NVRAM - Clearing the NVRAM is required anytime that a MPCB
is to be permanently removed from a printer. The NVRAM is a section
of nonvolatile memory that stores printer size information. The MPCB
is the identical for both printers but it will have to learn which size
printer it is installed in. Clearing the NVRAM allows the MPCB to
relearn which size printer it is reinstalled into.
Clearing the NVRAM also resets all values to their default settings,
including the clock. After clearing the NVRAM, all user settings and
electrical calibrations will be lost and needs to be performed again.
Clock Reset - Resets the system clock to “000.” This procedure should
only be accomplished when refurbishing a MPCB and installing it into
another printer.
Firmware Download/Upgrading for the PC
The normal method of downloading new firmware is to send the file as if
it was a standard print job.
To perform the firmware download, follow the steps listed below:
1. Power OFF printer, wait 15 seconds.
2. Connect parallel printer cable between the printer and PC.
3. Turn the printer ON.
4. Obtain the latest firmware for your printer. Save both of the
files to the same directory on the hard drive. Double click on
XXXX.EXE file to inflate the compressed files. The file name
might be different then listed above.
5. Go to a DOS environment and from within that same directory
type: GO XXXX.ROM and press Enter. The firmware is sent to
the printer as an ordinary print job.
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