3-77 Service Level Troubleshooting
Level 0 Diagnostics (Startup)
The printer automatically performs startup diagnostics during the startup cycle when
power is supplied or when the printer goes online. Startup diagnostics comprise the
following actions:
1. Power off the printer.
2. Perform the following:
a. CRC check of the firmware ROM, read external RAM
b. EEPROM check
Note: Failure causes startup diagnostics to stop.
The Printer Status (Amber) LED then turns on when the above tests have been
completed.
3. Check if paper is present.
4. Return the knife to the home position.
Note: Failure causes a fault condition.
5. Check if printer Top Cover/Printer Door is closed.
Note: Failure causes turning on the Printer Status (Amber) LED until the Top Cover
or Printer Door is closed.
6. Return the Dot Impact Head to home position.
Note: Failure causes turning on the Printer Status (Amber)LED until the Top Cover
or Printer Door is closed.
When the last step is complete, the Paper Feed button is enabled and the printer is
ready for normal operation. Information about the test is available in the
communication interface through the commands.
If the printer has not been turned on, or a new EEPROM has been installed, the default
values for the printer functions (set in Level 1 Diagnostics) are loaded into the EEPROM
during startup diagnostics. For more information on printer settings, refer to Level 1
Diagnostics (Printer Configuration) on the facing page. If the EEPROM load has failed, the
Printer Status LED is turned on.
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