Users Manual Part 4

Diagnostics and Troubleshooting
Troubleshooting—Miscellaneous Issues
142
P1106464-001 ZT411/ZT421 Color Touch User Guide 5/9/19
Miscellaneous Issues
Issues with the Display
Issue Possible Cause Recommended Solution
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 Home screen, touch Menu, which is
the icon on the bottom-left.
2. Touch the top selection on the screen.
3. Scroll through the language selections under
this menu option. The selections for this
parameter are displayed in the actual
languages to make it easier for you to find
one that you are able to read.
4. Touch the language that you want to display
to select it.
5. Touch the Home icon to return to the Home
screen.
The display is missing
characters or parts of
characters
The display may need
replacing.
Call a service technician.
The USB Host Port Is Not Acknowledging a USB Device
Issue Possible Cause Recommended Solution
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.
DRAFT