Appendix A: How to troubleshoot SE 79:04
Solutions and workarounds
When a job consistently generates a 79:04 system error, it is either because of a issue in the printer’s firmware or because of a defect in the job itself (when it has been generated by 3rd party SW). In order to identify the cause and find out a solution, these issues should always be immediately escalated to the GBU through the GCC.
Also, there are a set of workarounds and short term solutions that can be tested in order to get the customer up and running in the shortest possible time:
1Send the job using a variety of different settings. Many times, the issue is caused by a combination of the job contents combined with some specific setting(s).
2If the customer is sending the file directly to the printer, try using the HP driver instead.
3If the issue is occurring when printing through the HP PostScript driver from an application with PS passthrough, try changing the options in the application so that it prints PS as raster (the option is typically located in the “Advanced” options of the application’s printing dialog).
Data related SE79:04
HP Designjet printers have Hard Disks and non volatile memories that contain data bases and files that can be modified with user data. Some examples include:
The printer’s queue
The hard drive partitions that contain user jobs
The data base that stores the printer settings
The data base that stores accounting information
Some of this data is accessed by the printer at start up, and some others are accessed as needed.
If any of this fields contains corrupt data or data with characters or values that cannot be correctly processed by the printer, a 79:04 system error may occur.
Possible symptoms
There are two different types of symptoms for data related 79:04 system errors:
1When the corrupt data is accessed during start up:
a The printer will display a 79:04 during the start up process
b Switching the printer off and on again will not solve the issue. The printer will continue displaying the 79:04 system error until the corrupt data has been cleared through a service procedure
2When the corrupt data is accessed during normal printer operation a The printer will start up normally
b When the data is accessed (for example while printing, while navigating the queue or when changing some settings), the printer displays a 79:04 system error
HP Designjet T Series — Service Manual |