Cognitive Solutions All in One Printer B780 ユーザーズマニュアル

A776-PG00001 C 12/09 

A776 (B780) Programming Guide

The A776/B780 printer performs a number of diagnostics that provide useful information about the operating status of 
the printer. The following diagnostic tests are available. 

•  Startup diagnostics, performed during startup cycle.
•  Runtime diagnostics, performed during normal

printer operation.

•  Remote diagnostics, run 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. To learn more see the section 
called “Configuring the Printer” in the A776/B780 User 
Guide, page 26.

  Communication interfaces (except Ethernet)
  Diagnostic modes
  RS-232C settings
  Printer emulations/software options
  Hardware options

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 and solenoids
•  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 light flashes a set number of 
times, indicating the nature of the failure. The table 
in the “Indicators” section (page 16) describes the 
specific tone and light sequences.

•  Check if paper is present
•  Return the knife to the home position

  Failure causes a fault condition. The table in the 

“Indicators” section (page 16) describes the specific 
tone and light 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.

Runtime diagnostics (sometimes called level 2 
diagnostics) run during normal printer operation. When 
the following conditions occur, the printer automatically 
turns off the appropriate motors and disables printing to 
prevent damage to the printer:

•  Paper out
•  Receipt cover open
•  Knife unable to home
•  Printhead too hot
•  Voltages out of range
The light on the operator panel will signal when these 
conditions occur as well as indicate what state or mode 
the printer is in.

Remote diagnostics (sometimes called level 3 
diagnostics) keeps track of the following tallies and 
prints them on the receipt during the print test. See the 
sample test printout on the next page. These tallies can 
be used to determine the printer’s state of health.

•  Model number
•  Serial number
•  CRC number
•  Number of lines printed
•  Number of knife cuts
•  Number of hours the printer has been on
•  Number of flash cycles
•  Number of cutter jams
•  Number of times the cover is opened
•  Maximum temperature reached
(See tallies note on the following page.)