Specifications

7193 Service Guide Chapter 3: Diagnostics
August 1998 21
Chapter 3: Diagnostics
The following diagnostic tests are available for the 7193:
• Level 0 Diagnostics
Performed during the startup cycle
• Level 1 Diagnostics (setup mode)
Available in a dedicated environment and accessed through the DIP Switches
• Level 2 Diagnostics
Performed during normal printer operation
Level 0 Diagnostics
The printer performs level 0 diagnostics during the startup cycle when power is supplied
to the printer. Models that receive power from a power supply (remote) also run Level 0
Diagnostics when the printer is brought on-line (On Line button is pressed). Level 0
diagnostics comprise the following actions:
• Motors are turned off
• Microprocessor timing is checked, CRC check of the firmware ROM is performed,
external RAM is read (failure causes level 0 diagnostics to stop; the printer beeps once
when the test is successfully completed)
• Checks if paper is present
• Homes knife (failure causes a fault condition)
• Checks if receipt cover is closed (failure does not interrupt the startup cycle)
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 to the communication
interface through the commands.
If the printer has not been turned on before, or a new EEROM has been installed, the
default values for the printer settings (set in Level 1 Diagnostics) will be loaded into the
EEROM. The printer beeps twice when this occurs. See the tables in “Level 1 Diagnostics”
for the printer settings. If the printer beeps twice at any other time, it indicates that the
EEROM has failed.