Port for the Print Head Test - ^JT and ~HQJT ZPL Commands

Port for the Print Head Test - ^JT and ~HQJT ZPL Commands

Article ID: 46826910



Topic or Information

Head Test Information

Applies To

Printers listed below


Some Zebra printer models support the Head Test Feature.  This allows the user to run a test at a given interval and receive details on if a print head element has gone bad.  The ZPL command ^JT is used to set the test interval and the ~HQJT command can return the test results back to the host.  Here is an example using the Zebra Setup Utility to return data from the host. Read More>>

See the ZPL Programming Guide for details. Read More>>

  Standard PHD Extended PHD
LP/TLP2824 Plus Yes Not applicable
GK420 Yes Not applicable
GX420 Yes Not applicable
GC420 No Not applicable
HC100 No Not applicable
S4M No N/A
ZM400 / RZ400 No N/A
ZM600 / RZ600 No N/A
105SL No N/A
110PAX4 / R110PAX4 No Yes
170PAX4 ** Yes Yes
ZE500-4 No N/A
ZE500-6 ** Yes N/A
110Xi4 / R110Xi4 ** Option* N/A
140Xi4 ** Yes N/A
170Xi4 ** Yes N/A
220Xi4 ** Yes N/A
ZT200 Series  No No 
* Requires option board P1006158
** The HQJT command does not work with the Xi printers and never did. It is suggested that the ~HQES command be used to detect printhead test results

+ Product Codes

  • 110Xi4 Industrial Printer
  • 140Xi4 Industrial Printer
  • 170Xi4 Industrial Printer
  • 220Xi4 Industrial Printer
  • G-Series GK Desktop Printers
  • G-Series GX Desktop Printers
  • GK420 Healthcare Desktop Printers
  • GK420d Desktop Printer
  • GK420d Healthcare Desktop Printer
  • GK420t Desktop Printer
  • GK420t Healthcare Desktop Printer
  • GX420Rx Desktop Printer
  • GX420d Desktop Printer
  • GX420t Desktop Printer
  • GX430d Desktop Printer
  • GX430t Desktop Printer
  • R110Xi4 RFID Printer
  • Xi Series Industrial Printers
  • ZE500 Print Engines
  • ZE500 Print Engines