HP Designjet T7200

As an exception to this general rule, there are certain applications that can generate their own PS code, such
as Adobe PhotoShop, Adobe Illustrator, Adobe Acrobat, Corel Draw, Freehand and QuarkXpress. When used
with a PS driver, these applications generate the output PS themselves, instead of using the driver’s
rendering capabilities. This is known as PostScript pass-through. So, when using an HP PostScript driver
together with an application that has PS passthrough capabilities, the PS code that comes into the printer has
not been rendered by the HP driver, and, should the source file contain any PS commands that are not
correctly processed by the printer, a 79:04 system error could occur even though an HP driver is being used.
Solution
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 third-party software). In
order to identify the cause and find out a solution, these issues should always be immediately escalated to
the GBU through the GCC.
However, there are some workarounds and short-term solutions that can be tried in order to get the
customer up and running in the shortest possible time.
1. Send the job using a variety of different settings. The issue is often caused by a combination of the job
contents combined with some specific setting(s).
2. If the customer is sending the file directly to the printer, try using the HP driver instead.
3. If the issue occurs 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 SE 79:04
The printer has a hard disk and non-volatile memory that contain databases and files that can be modified by
the customer. Some examples include:
●
The printer’s queue
●
The hard-disk partitions that contain the customer's jobs
●
The database that stores printer settings
●
The database that stores accounting information
Some of these data are accessed by the printer at start-up time, and some others are accessed as needed.
If any of these fields contain corrupt data or data with characters or values that cannot be correctly
processed by the printer, a 79:04 system error may occur.
Cause
There are two different types of symptoms for data-related 79:04 system errors.
1. When the corrupt data are 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 have been cleared through a service procedure.
2. When the corrupt data are accessed during normal printer operation:
a. The printer will start up normally.
b. When the data are accessed (for example while printing, while navigating the queue or when
changing some settings), the printer displays a 79:04 system error.
26 Chapter 2 Troubleshooting ENWW