SATO GL4 Series Operator's Manual page 71

5.6 TROUBLESHOOTING GUIDE (CONT'D)
Symptom: Low quality print
No. What to check
1
Are the paper and carbon ribbon
set correctly?
2
Are the paper and carbon ribbon
set correctly?
3
Is the platen roller dirty?
4
Is the printer head dirty, or is a
label on the head?
5
Are you using stained paper?
6
Are you using
genuine paper
and carbon
ribbon
specifically
designed for the
printer?
Caution
Pull out the power cable before cleaning the printer.
GL Series Operator's Manual
Remedy
Check if the paper and carbon ribbon are securely fixed.
Also, lower the head-open lever of the printer head unit,
and check if the paper and carbon ribbon are in the
normal position.
Check the paper and carbon ribbon. Set the print
density again.
If the platen roller is dirty, wipe off the dirt with the
supplied cleaning set.
If the print head is dirty, wipe off the
dirt with the attached cleaning set. If
a label is on the head, take it away.
* Do not use a metallic object to
remove it (the printer head may be
damaged). If glue of the label is
stuck to the printer head, wipe it off
with the supplied cleaning set.
See Section 4: Cleaning and Maintenance.
Determine if the print head needs replacement:
* Check for vertical streaking in the same location of
every label. If cleaning the print head does not cause
the streaking to be eradicated, then the printhead may
be worn. Remove the printhead and examine it for
physical damage or wear.
* Load a different roll of labels and ribbon, and then run
test prints again. If the vertical streaks continue to sur-
face, then the printhead needs to be replaced.
See Section 4: Cleaning and Maintenance.
Use clean paper.
Be sure to use genuine paper and
carbon ribbon
specifically designed for the
printer.
Section 5: Troubleshooting
Page 5-11