Troubleshooting; Common Problems - zenpert 4D520 User Manual

6. Troubleshooting

6.1 Common Problems

The following guide lists the most common problems that may be encountered when operating
this bar code printer. If the printer still does not function after all suggested solutions have been
invoked, please contact the Customer Service Department of your purchased reseller or
distributor for assistance.
Problem
Not Printing
No print on the
label
Continuous
feeding labels
Paper Jam
Poor Print Quality
Possible Cause
Check if interface cable is well
connected to the interface connector.
The port specified in the Windows
driver is not correct.
Label loaded not correctly.
The printer setting may go wrong.
Gap/black mark sensor sensitivity is
not set properly (sensor sensitivity is
not enough)
Make sure label size is set properly.
Labels may be stuck inside the
printer mechanism near the sensor
area.
Top cover is not closed properly.
Wrong power supply is connected
with printer.
Check if supply is loaded correctly.
Check if dust or adhesives are
accumulated on the print head.
Check if print density is set properly.
Check print head test pattern if head
element is damaged.
Re-connect cable to interface.
Select the correct printer port in the
driver.
Follow the instructions in loading
the media.
Please do the initialization and
gap/black mark calibration.
Calibrate the gap/black mark
sensor.
Set label size exactly as installed paper
in the labeling software or program.
Remove the stuck label.
Close the top cover completely and
make sure the right side and left side
levers are latched properly.
Check if 24V DC output is supplied by
the power supply.
Reload the supply.
Clean the print head.
Adjust the print density and print
speed.
Run printer self-test and check the print
head test pattern if there is dot missing
in the pattern.
25
Recovery Procedure