User Interaction related SE79:04
In some cases the printer may not react as expected when a certain set of conditions coincide. In these
cases, if the printer doesn’t know how to react, it may simple display a 79:04 system error and force a
restart. Some examples (not real) that can help to illustrate this:
• An error occurs when a job is cancelled when it is at the “Finishing print” state and when the queue is
disabled
• An error occurs if the Window is opened while the printer is checking the printheads
These errors will most likely only happen in very specific corner cases that have not been identified
during the development or the qualification of the printer, so normally, they do not severely impact the
customer, as they do not affect their regular working flows.
Cause Solution
The symptoms here are as numerous as the number of
possible interactions between the user and the printer. In any
case, it’s possible to identify the steps that caused the error to
occur and avoid them as the steps will always be the same
with no variance.
Important: An major element in determining the error is
what the state the printer was in at the time the error was
displayed. Actions the user has made when the printer is
drying for example can produce an error, whereas the same
action when the printer is doing something else (or is idle)
may not produce any errors.
The recommended action plan in these cases is to identify the
previous steps that caused the error and:
1. Escalate the issue to the GBU through the GCC in order
to have it corrected in the firmware.
2. Recommend to the customer that they try to avoid the
same steps to prevent the issue
3. If the conditions that cause the error are in the customer’s
regular workflow, try to identify a different way of
achieving the same result out of the printer.
30 Chapter 1 Troubleshooting ENWW
Troubleshooting
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