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Zebra S400 & S600 User’s Guide 47
Symptom Diagnosis Action
DATA LED is single flashing. CANCEL button was
pressed and a
format was deleted.
No action required.
PAUSE LED and DATA LED alternately
flashing, but all other LEDs on.
Firmware error. Call a service technician for instructions on
how to download and install firmware.
DATA LED is flashing. Printer is receiving
data.
Printing resumes when data is received.
DATA LED is slow flashing. Printer sent a “stop
transmitting” to the
host computer.
No action required.
Dots missing in printed area of label.
Dirty printhead. Clean the printhead. See page 29.
Printhead element
going bad. Print
quality problems.
Call a service technician.
Print width set
incorrectly.
Default the printer. See “Resetting Factory
Defaults” on page 54.
Loss of printing
registration on labels.
For Peel-Off mode:
Possible media
sensor problem.
Adjust media sensor position (see page 18)
and call a service technician if necessary.
Printer set for non-
continuous media,
but continuous
media loaded.
Set printer for correct media. See “Non-
Continuous Media” and “Continuous Media”
on page 19.
Improperly adjusted
media edge guides
or power roller.
See “Adjusting the Media Sensor” on
page 18 and “Backing Rewind Power Roller
Adjustment” on page 42 for proper
positioning and adjustments.
Excessive vertical drift in top-of-form
registration.
Incorrect media
loading or media
sensor adjustments.
See “Loading the Media” on page 8 or
“Adjusting the Media Sensor” on page 18.
Light vertical lines approximately 0.006
wide running through all labels.
Dirty head or ribbon
rollers.
See “Cleaning the Printhead and Platen
Roller” on page 29.
Defective printhead
elements.
Call a service technician.
Light printing or no printing on the left
or right side of the label.
Printhead needs
balancing.
Adjust balance. See “Toggle Pressure
Adjustment” on page 40.
Short printed lines at 45° to label edge
on left or right side of label.
Too much printhead
pressure.
Reduce the pressure. See “Toggle
Pressure Adjustment” on page 40.