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
106 6822 Series 80-Column Printer User’s Manual
Font Module Verification
A CRC is performed on the font modules, which are loaded into writable
flash font memory. The calculated CRC is compared to the CRC
embedded in the program module. Results are printed on the self-test
report.
A2D Check
Current reading of the A2D sources are performed, and the results are
printed on the self-test report.
Nonvolatile Diagnostic Memory Verification
A CRC is performed on the area of the nonvolatile diagnostic memory
that has a CRC over it. Results are printed on the self-test report.
Nonvolatile Diagnostic Memory Update
The nonvolatile diagnostic memory is updated from the nonvolatile
diagnostic memory data shadowed in memory.
Detailed Printer Self-Test
Perform a self-test to verify printer functions, and provide reporting of
printer diagnostics. The self-test performs a series of internal diagnostics
and prints the results. When the self-test begins, the beeper sounds for
half a second and all LEDs turn on for half a second.
Initiating Self-Test
• While the printer is idle or in Suspend mode, press the Line Feed and
Set Page buttons simultaneously to initiate a
self-test.
Terminating Self-Test
• Press the Line Feed and Set Page buttons simultaneously to manually
terminate a self-test.
Self-Test Report
Note: This method is recommended to determine printer
functionality.