Releasing/ Replacing The Platen Roller; Adjusting Print Quality - SATO TH2 Series Operator's Manual

4.4 EASY REPLACEMENT OF PARTS (Cont'd)

4.4.2 Releasing/ Replacing the Platen roller

1.
Make sure the printer is powered off and disconnect the
power cable. If the optional battery pack is installed, remove
it as well.
2.
Lift the Top Cover.
3.
Unfasten the two screws attaching the gear cover as
shown. Remove the screws and cover, and set them aside.
4.
Flip the dispensing plate upwards to a vertical position. A
click sound is heard.
5.
Lift up the defective platen roller assembly with the
dispensing plate and replace it with a new one.
6.
Follow the above steps, in reverse sequence, to
reassemble the parts. Make sure that the dispensing plate
snaps back into position.
Perform a label feed to ensure that the platen roller is
correctly assembled.

4.5 ADJUSTING PRINT QUALITY

Print quality can be optimized with regular cleaning and maintenance of the print head and components along
the media path. Additionally, you can fine-tune print quality by adjusting print darkness and print speed
settings.
When evaluating and adjusting the printer for optimum print quality, a barcode verifier system is highly
recommended for evaluating the printouts. The human eye is a poor judge of the relative widths of the bars in
a symbol, a characteristic that is extremely important for good barcode quality.
Print Darkness
This adjustment allows the user to control (within a specified range) the amount of power that is used to
activate the print head heating elements. It is important to find a proper print darkness level based on your
particular label. The printed images should not be too light, nor should the edges of text or graphics be
smudged. Instead, the edges of each image should be crisp and well-defined. The adjustment can be made
via the PRINTER SETTING menu.
Print Speed
The other method of controlling print quality is by controlling the speed at which the label is printed. It is
especially critical when printing ladder barcodes (barcodes printed with the bars parallel to the print line).
When printing a ladder barcode, it is important to allow the head to cool sufficiently before stepping to the next
position. If it does not have sufficient time to cool, the bar will be smeared on the trailing edge. The adjustment
can be made via the PRINTER SETTING menu. For more information, please refer to Section 3.7.3 When
Print Ctrl is selected in the SETUP menu.
TH2 Series Operator Manual
Section 4: Cleaning and Maintenance
Gear cover
2
Screws x 2 1
Dispensing
plate
Page 4-5