Diagnostics and Troubleshooting
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Communication Diagnostics Mode
The communication diagnostics test is a troubleshooting tool for checking the interconnection between the
printer and the host computer. When the printer is in diagnostics mode, it prints all data received from the
host computer as straight ASCII characters with the hex values below the ASCII text. The printer prints all
characters received, including control codes such as CR (carriage return). Figure 8 shows a typical test
label from this test.
NOTE: The test label prints upside-down.
Figure 9 Sample Communications Diagnostics Mode Label
1. Set the label width equal to or less than the actual media width being used for the test. Tap
Menu > Print > Print Quality > Label Width to access the label width setting.
2. Tap Menu > System > Program Language, and set the Diagnostic Mode option to ENABLED.
The printer enters diagnostics mode and prints any data received from the host computer on a test label
3. Check the test label for error codes. For any errors, check that your communication parameters are
correct.
Errors show on the test label as follows:
•FE indicates a framing error.
•OE indicates an overrun error.
•PE indicates a parity error.
•NE indicates noise.
4. To exit this self test and return to normal operation, power cycle the printer or set the Diagnostic Mode
option to DISABLED.
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