User's Manual Part 3
Table Of Contents
- Checking the Power Source
- Aligning the Printer Mechanism
- Troubleshooting System Components
- Understanding Diagnostic Information
- Communications Pin-Out Configurations
- Specifications
- Printer Dimensions
- Media Specifications
- Understanding the Fanfold Paper Page Layout
Chapter 6 — Troubleshooting
114 6822 Series 80-Column Printer User’s Manual
Compatibility Issues
Use the following information to determine some compatibility issues
that come up relative to the 6822:I
Understanding Diagnostic Information
Diagnostic information is stored in flash to support the hardware
configuration, both at time of manufacture and in the field. This includes
recording the initial configuration changes to hardware and software,
and various environmental statistics helpful in determining why failures
are occurring in the field. The flash is provided for storage of critical
data that must remain in the unit after power to the unit is lost. The data
in the flash is used for diagnostic information for a catastrophic failure,
or over the phone with a customer.
Diagnostic information is updated and maintained by the printer. All
diagnostic information is shadowed in RAM. At the end of every 50
forms, the flash information is updated from the RAM. The printer also
updates the diagnostic information for nonrecoverable error, printer
resets, printer self-test, and remote polling of diagnostic information.
Fields are stored with ID first, then length, then data. The details of the
data and the length of the entire field, including ID and Length bytes, are
shown in the “Diagnostic Information” table on page 115.
The amount of flash memory reserved for nonvolatile diagnostic
memory is 16 K bytes. Printer self-test prints most of the information
contained in the diagnostic memory for remote and end-user diagnostic
access.
Compatibility Issues and Conclusions
Issue Conclusion
Does a 6820 ribbon work on the 6822? Yes.
Do 6820 applications work on the 6822? Yes. Applications that work on the 6820 also work on
the 6822.
Does the 6822 work with an application
that downloads some custom characters to
the printer?
Yes. The downloadable character set feature is the same
for both the 6820 and 6822.
Can 6820 printers be replaced with 6822s? Yes. 6822s can be installed on existing 6820 mounting
brackets.