Check if interface cable is well
connected to the interface connector.
Re-connect cable to interface.
The serial port cable pin configuration
is not pin to pin connected.
Please replace the cable with pin to
pin connected.
The serial port setting is not consistent
between host and printer.
Please reset the serial port setting.
The port specified in the Windows
driver is not correct.
Select the correct printer port in the
driver.
The Ethernet IP, subnet mask, gateway
is not configured properly.
Configure the IP, subnet mask and
gateway.
Label loaded not correctly.
Follow the instructions in loading the
media.
The printer setting may go wrong.
Please do the initialization and
gap/black mark calibration.
Gap/black mark sensor sensitivity is
not set properly (sensor sensitivity is
not enough)
Calibrate the gap/black mark sensor.
Make sure label size is set properly.
Set label size exactly as installed
paper in the labeling software or
program.
Labels may be stuck inside the printer
mechanism near the sensor area.
Top cover is not closed properly.
Close the top cover completely and
make sure the right side and left side
levers are latched properly.
Check if supply is loaded correctly.
Change the label combination.
Check if dust or adhesives are
accumulated on the print head.
Check if print density is set properly.
Adjust the print density and print
speed.
Check print head test pattern if head
element is damaged.
Run printer self-test and check the
print head test pattern if there is dot
missing in the pattern.
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