Zebra QLn420 User's Guide download pdf (Page 58)

QLn Series User Guide

• Clean print head.

• Ensure printhead is properly closed and latched.

5. Garbled print:

• Check baud rate.

6. No print:

• Check baud rate.

• Replace battery.

• Check cable to terminal.

• Establish RF Link (Wireless units only) and/or restore LAN

associativity (Printers with WLAN radios only).

• Invalid label format or command structure. Place printer in

Communications Diagnostic (Hex Dump) Mode to diagnose

problem.

7. Reduced battery charge life

• If battery is older than 1 year old, short charge life may be

due to normal aging.

• Check battery health.

• Replace battery.

8. ashing:

• Flashing indicator is normal while data is being received.

9. or ashing:

• Check that media is loaded and that the media cover is closed and

securely latched.

10. Skips labels:

• Check media for top of form sense mark or label gap.

• Check that the maximum print field has not been exceeded

on label.

• Ensure bar or gap sensor is not blocked or malfunctioning

11. Communication error:

• Check baud rate.

• Replace cable to terminal.

12. Label jam:

• Open head release latch and media cover.

• Remove and reinstall media.

13. Blank LCD screen

• Make sure printer is turned on.

• No application loaded or application corrupted: reload

program.

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Zebra QLn420 User's Guide Page 58