Brother TJ-4420TN User Manual page 87

Problem
Poor Print Quality.
Incomplete printing on the left
or right side of label.
Blank labels with gray lines.
Irregular printing.
Labels are fed incorrectly
(skewed) when printing.
Labels are skipped when
printing.
Ribbon Wrinkles.
Possible Cause
The ribbon/media is loaded
incorrectly.
Dust or adhesive has
accumulated on the Print
Head.
The print density is set
incorrectly.
The Print Head is damaged.
The ribbon/media is
incompatible.
The Print Head tension is not
set correctly.
The label size is not specified
correctly.
The Print Head is dirty.
The Platen Roller is dirty.
The printer is in Hex Dump
Mode.
The printer's RS-232
communication is not set
correctly.
The media guide does not
touch the edge of the media.
The label size is not specified
correctly.
The sensor sensitivity is not
set correctly.
The media sensor is dirty.
The Print Head tension is not
set correctly.
The ribbon is installed
incorrectly.
The media is installed
incorrectly.
The print density/darkness is
not set correctly.
83
Solution
Reload the media/ribbon.
Clean the Print Head.
Clean the Platen Roller.
Adjust the print density and print speed.
Run the printer self-test and check the
Print Head test pattern for missing dots.
Install the correct ribbon/media.
Use the Print Head Tension Adjustment
Knob to adjust the Print Head tension.
(See section 4. Improve Print
The Release Lever is not locked in place.
Check if the label size is set up correctly.
Clean the Print Head.
Clean the Platen Roller. (See section
11. Maintenance.)
Turn the printer on and off to skip the
Dump Mode. (See section
6.1.2 Gap/Black Mark Sensor Calibration,
Self-Test, and Entering Dump
Make sure the printer's RS-232 settings
are set up correctly. For more information,
see section 7.3.1 Serial Communication
Settings.
If the label is moving to the right side,
move the Front Label Guide to the left.
If the label is moving to the left side, move
the Front Label Guide to the right.
Check if the label size is set up correctly.
Calibrate the Gap Sensor either manually
or automatically (See section
Settings).
Clean the Gap/Black Mark Sensor using
a compressed air or vacuum.
Use the Print Head Tension Adjustment
Knob to adjust the Print Head tension.
(See section 4. Improve Print
Reinstall the ribbon.
To install the ribbon roll, see section
3.2 Load the Ribbon.
Reinstall the label roll.
To install the label roll, see section
3.4 Load the Media.
Adjust the print density/darkness to
improve the print quality.
Quality)
Mode.)
7.2 Sensor
Quality)