User guide

A795 User Guide: Programming Supplement
Chapter 2: Diagnostics and Configuration
11
Chapter 2: Diagnostics and Configuration
The A795 printer performs a number of diagnostics which provide useful information about the operating status of the
printer. The following diagnostic tests are available. See the sections that follow for more information.
• Startup diagnostics
Performed during the printer’s startup cycle.
• Runtime diagnostics
Performed during normal printer operation.
• Remote diagnostics
Maintained during normal operation and reported in the
print test.
The printer can be configured with the following settings
and functions through the configuration menu that is
printed on the receipt. For more information on configuing
the printer, see the “Printer Configuration” section which
follows in this chapter.
• Communication interfaces
• RS-232C settings
• Printer emulations
• Printhead resistance
• Datascope mode
Startup Diagnostics
When the printer receives power or performs a hardware reset, it automatically performs the
startup diagnostics (also known as level 0 diagnostics) during the startup cycle. The following
diagnostics are performed:
• Turn off motors
• Perform boot CRC check of the firmware ROM, test
external SRAM, test EEPROM, and test main program
CRC
Failure causes Startup Diagnostics to stop; the printer
beeps and the LED flashes a set number of times,
indicating the nature of the failure. The table in the
“Indicators” section later in this chapter describes the
specific tone and LED sequences.
• Check if paper is present
• Return the knife to the home position
Failure causes a fault condition. The table in the
“Indicators” section later in this chapter describes the
specific tone and LED sequences.
• Check if receipt cover is closed
Failure does not interrupt the startup cycle.
When the startup diagnostics are complete, the printer
makes a two-tone beep (low then high frequency), the
paper feed button is enabled and the printer is ready for
normal operation.
If the printer has not been turned on before, or a new
EEPROM has been installed, the default values for the
printer functions will be loaded into the EEPROM
during startup diagnostics.