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PX4i and PX6i High Performance Printer User Guide 99
11. If the LSS does not move as described in Steps 8 and 9, make sure that:
• the cursor position is accurate. Refresh the cursor position by pressing the
key.
• the LSS is laterally aligned with the slots or black marks.
• both the upper and lower parts of the LSS are aligned with each other.
• the transfer ribbon is properly loaded so it does not interfere with the LSS. For
help, see "Loading Ribbon" on page 38.
• the LSS guides are clean and free from stuck labels or other objects that may
interfere with the light that goes from one part of the LSS to the other. For help,
see "Cleaning the Printer" on page 101.
• the media does not have some kind of preprint that may disturb detection.
• there is enough difference between the black marks and the surrounding areas.
• the liner is transparent enough.
• the LSS works properly with another type of media.
Adjusting the Printhead Pressure
The pressure of the thermal printhead against the direct thermal media is factory-
adjusted. But, you may need to adjust the printhead pressure to accommodate
thicker or thinner media.
Note: Do not use a higher printhead pressure than necessary, because it may increase the
wear of the printhead and shorten its life.
To adjust the printhead pressure
1. Turn the adjustment knob clockwise for more pressure and a darker printout (+)
or counter-clockwise for less pressure (-) and a lighter printout.