Brother E850TKW User Manual page 210

Troubleshooting
Problem
The label or tube is not printed
correctly, or the print result of the
tube is not satisfactory (faint or
smudged ink).
The fed tube is dirty.
Solution
 Remove the tape cassette or ribbon cassette and reinstall it, pressing it
firmly until it locks into place.
 If the label print head is dirty, clean it with a dry cotton swab (see Cleaning
the Print Head on page 184) or optional print head cleaning cassette
(TZe-CL6 for label print head only).
If the quality of the printed characters is poor even after wiping the label print
head, wipe the label roller with a dry cotton swab. See Cleaning the Label
Roller on page 185.
 If the tube print head is dirty, clean it with a dry cotton swab. See Cleaning
the Print Head on page 184.
 If the tube or tube cleaner is dirty, replace the tube cleaner. For more
information about replacing the tube cleaner, see Replacing the Tube
Cleaner on page 187.
 The rollers may be worn and need to be replaced. For more information
about replacing the rollers, see Replacing the Rollers for Tubes
on page 188.
 Try changing one of the following settings using the [Tube Settings] tab in
[Device Settings] in the "Printer Setting Tool" or using the P-touch
keyboard to select [Settings] - [Tube Adjustment] in the Home screen.
• Change the printing speed.
If you use the P-touch in an environment with a temperature of 20°C or
lower, we recommend setting [Print Speed] to [Better Quality].
• Change the feeding pressure.
If the characters are faint, change [Feeding Pressure] to a stronger
setting.
• Change the printing density.
If the characters are faint, change [Print Density] to a higher setting.
For more information, see Tube Settings Tab on page 116 or Adjusting
the Tube Print Settings on page 47.
Replace the tube cleaner. For more information about replacing the tube
cleaner, see Replacing the Tube Cleaner on page 187.
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