Chapter 4 — Troubleshooting and Maintaining the Printer
102 PM4i Mid-Range Printer User’s Manual
10 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 D 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 31.
• 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 106.
• 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.
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