1. ZT400 Series Industrial Printer User Guide
  2. Diagnostics and Troubleshooting
  3. Alerts and Error States
  4. Troubleshooting
  5. Miscellaneous Issues
  • ZT400 Series Industrial Printer User Guide
Miscellaneous Issues

Miscellaneous Issues

Use this information to identify miscellaneous issues with the printer, the possible causes, and the recommended solutions.
For videos and additional online information designed to assist you, see these pages on zebra.com:
Issue
Possible Cause
Recommended Solution
Issues with the Display
The control panel display shows a language that I cannot read
The language parameter was changed through the control panel or a firmware command.
  1. On the control panel display, scroll through the language selections under this menu option.
  2. Press
    OK
     to access the items in this menu.
  3. Use the
    UP ARROW
     or
    DOWN ARROW
     to scroll through the language selections.
  4. Select the language that you want to display.
The display is missing characters or parts of characters
The display may need replacing.
Call a service technician.
Printer Parameters Are Not Set As Expected
Changes in parameter settings did not take effect.
OR
Some parameters changed unexpectedly.
Some parameters are set incorrectly.
  1. Check the parameters and change or reset if necessary.
  2. Turn printer power off (
    O
    ) and then on (
    I
    ).
A firmware setting or command prevented the ability to change the parameter.
Check your label formats or the settings of the software that you use to send formats to the printer.
If necessary, refer to the Programming Guide for ZPL, ZBI, Set-Get-Do, Mirror, and WML or call a service technician. A copy of the manual is available at zebra.com/manuals.
A command in a label format changed the parameter back to the previous setting.
If the problem persists, there may be a problem with the main logic board.
Call a service technician.
The USB Host Port Is Not Acknowledging a USB Device
The printer is not acknowledging a USB device or is not reading the files on a USB device that is plugged into the USB host port.
The printer currently supports USB drives only up to 1 TB in size.
Use a USB drive that is 1 TB or smaller.
The USB device may require its own external power.
If your USB device requires external power, make sure that it is plugged into a working power supply.
IP Address Changing
My printer reassigns a new IP address to the print server after the printer has been off for a while.
The settings for your network are causing the network to reassign a new IP address.
If the printer changing IP addresses causes issues for you, follow these steps to assign it a static IP address:
  1. Find out what values need to be assigned to the IP address, subnet mask, and gateway for your print server (wired, wireless, or both).
  2. Change the appropriate IP protocol value to PERMANENT.
  3. Change the values for the IP address, subnet mask, and gateway for the appropriate print server to what you want them to remain.
  4. Reset the network by navigating to
    Menu
    Connections
    Networks
    Reset Network
     and then press
    OK
     to save the changes.
Cannot Connect through Wired or Wireless Connections
I manually entered a wireless IP address, subnet, and gateway on my printer, but it won’t connect to my wired or wireless network.
The printer’s network must be reset after values are changed.
Reset the network by navigating to
Menu
Connections
Networks
Reset Network
 and then press
OK
 to save the changes.
An ESSID value has not been specified.
  1. For a wireless connection, specify the ESSID value that matches the value used by your wireless router using the following Set/Get/Do command:
    ! U1 setvar "wlan.essid" "value"
    where "value" is the ESSID (sometimes called a network SSID) for your router. You can look on the back of your router for a sticker with the router’s default information.
    If the information has been changed from the default, check with your network administrator for the ESSID value to use.
  2. If the printer still does not connect, reset the network by touching
    Menu
    Connections
    Networks
    Reset Network
     and then touching the checkmark to save the changes, and then power-cycle the printer.
The ESSID or other value was not specified correctly.
  1. Print a network configuration label and verify that your values are correct.
  2. Make corrections as necessary.
  3. Reset the network by accessing
    Menu
    Connections
    Networks
    Reset Network
     and then pressing
    OK
     to save the changes.
Calibration Issues
Auto Calibrate failed.
The media or ribbon is loaded incorrectly.
Ensure that the media and ribbon are loaded correctly. See Loading the Ribbon and Loading the Media.
The sensors could not detect the media or ribbon.
Calibrate the printer. See Calibrating the Ribbon and Media Sensors.
The sensors are dirty or positioned improperly.
Ensure that the sensors are clean and properly positioned.
The media type is set incorrectly.
Set the printer for the correct media type (gap/notch, continuous, or mark).
Non-continuous labels are being treated as continuous labels.
The printer was not calibrated for the media being used.
Calibrate the printer. See Calibrating the Ribbon and Media Sensors.
The printer is configured for continuous media.
Set the printer for the correct media type (gap/notch, continuous, or mark).
Printer Locks Up
All indicator lights are on, nothing is on the display, and the printer locks up.
Internal electronic or firmware failure.
Power cycle the printer.
If the problem persists, call a service technician.
The printer locks up while booting up.
Main logic board failure.