HP Designjet T Series — Service Manual 2-43
Appendix A: How to troubleshoot SE 79:04
The printer information pages (either printed and faxed or obtained
through the Embedded Web Server)
The System Error detailed information (it can be obtained by pressing
CANCEL + Down)
The printer logs. In order to obtain the printer logs, check the
corresponding appendix . See
Appendix C: Obtaining printer logs on
page 2-46.
Front panel displays 79:04 while printing
While printing a single job
The error happens after a single job is sent. It’s easy to identify which job
that ha
s produced the error, since every time that this same job is sent, the
error is replicated.
1 R
eboot the printer twice (after the first reboot, the printer will show the 79:04
system error again, since the printer will attempt to reprint the last job in the
queue, which is the one that caused the issue)
2 If y
ou are using an HP driver, update the driver to the latest version
3 U
pgrade the printer’s firmware. Even if the currently installed firmware
version is the latest one, re-install it. Send the job using different print
settings. The following ones can be helpful:
a T
ry sending the job without selecting a media profile in the driver
b T
ry changing the Image Quality settings
c If y
ou are using the HP-GL/2 driver, try the option “Send job as bitmap”
d If y
ou are using the PS driver, try using the HP-GL/2 driver instead
e If y
ou are using the PS driver from an Adobe application (or any other
application that can handle PS), try changing the application’s print
settings so that the PS is generated as Raster.
4 T
ry the following Front Panel settings:
a C
hange the Print Language option in the Front Panel from “Automatic”
(which is the default setting) to the language that is being printed (PS, HP-
GL/2, …)
b Que
ue = OFF
c S
tart Printing = After processing
d F
or PS SKUs, try changing the encoding setting (“Automatic” by default)
to Binary or ASCII
5 If
you are using a 3rd party application that does not print through the HP
driver, try modifying the printing workflow by:
a U
sing an HP driver
b C
hanging the settings in the application’s printing dialog
6 If y
ou are using an accessory JetDirect card, try using the internal network
connector or USB (if available).
7 E
scalate the issue, providing the following information:
Unit information: S/N, P/N, accessories
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