ENCAD 42e, Service Manual

Page: 75 / 162

Maintenance 75
MAINTENANCE
Novajet PROe Series Service Manual
Firmware Downloading
The normal method of downloading new firmware is to send the
printer a data file of the new code. This requires using an appro-
priate host utility called “go.exe.” This must be done through the
parallel port using a IEEE standard 1284 parallel cable. This
method requires code to be running in the printer to interpret the
file as it is sent.
If the EEPROM is blank or corrupt so that the printer does not
properly initialize (braindead), there is an additional step to
download firmware to the printer. This additional step requires a
special J Tag Adapter to be placed between the parallel cable and
the J16 on the printer’s MPCB. It is a required step that allows
some registers and DRAM to be written to, allowing a normal
firmware reload or upgrade to commence.
To bring the printer out of a braindead condition:
1) Remove the Right Cover completely to connect the J Tag
Adapter, see Chapter 5 for removal and installation
procedures for the Right Cover. See Figure 3-30 for
location of J16.
Figure 3-30. J Tag Connection on MPCB.
2) After connecting the J Tag Adapter between the parallel
port on the computer and J16 on the MPCB, power up the
printer.