1. ZD421 and ZD621 Series Desktop Printers User Guide
  2. Troubleshooting
  3. Communication Issues
  4. Issue: Label Job Sent, Data Transfers, But No Print
  • ZD421 and ZD621 Desktop Printers User Guide
Issue: Label Job Sent, Data Transfers, But No Print

Issue: Label Job Sent, Data Transfers, But No Print

A label format was sent to the printer but was not recognized. The DATA light flashes but no printing occurs.
Possible causes and resolutions:
  • The prefix and delimiter characters set in the printer do not match the ones in the label format. Verify the ZPL command prefix (COMMAND CHAR) and delimiter (DELIM./CHAR) characters. See Configuration Setting to Command Cross-reference.
  • Incorrect data is being sent to the printer. Check the communication settings on the computer. Ensure that they match the printer settings.
  • Incorrect data is being sent to the printer. Check the label format. Refer to the ZPL Programming Guide for details on printer programming. Links to the manual are available from the support pages for each printer model listed in About This Guide.