Issue / Question
Head Test Information
Applicable To
Printers listed below
Resolution / Answer
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. For more information, refer to Zebra Setup Utilities -- Sending Printer Commands and Receiving Data.
See the ZPL Programming Guide for details.
| 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 |
| 105SLPlus | Option* | N/A |
| 110Xi4 / R110Xi4 ** | Option* | N/A |
| 140Xi4 ** | Yes | N/A |
| 170Xi4 ** | Yes | N/A |
| 220Xi4 ** | Yes | N/A |
| ZT200 Series | No | No |
| ZT410 ZT420 Series | No | No |
| ZT411 ZT421 Series | Yes | N/A |
* Requires option board P1077930
** 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
