Intermec EasyCoder PX4i Service Manual page 89

Chapter 8 — Print Unit
LSS Manual
The LSS Manual option shows the actual setting given by the automatic
testfeed. The cursor on the lower line indicates the response on the actual
testfeed values for the Gain (sensitivity) and Drive (intensity).
LSS [G: 2]D: 6
You can toggle between gain (G) and drive (D) using the < > and < > keys
and decrease or increase the value using the < > and < > keys respec-
tively.
Note: Changing the gain and drive does not reset the LSS. It only affects
the testing. Once you leave the LSS Manual node, the values obtained by
the automatic testfeed become effective again.
If there are preprinted areas on the liner or cut-out slots etc., it can disturb
the automatic testfeed. To identify the problem, manually move the media
can check the response from the sensor in detail on the display. The solu-
tion is often to move the sensor sideways to a position where the preprint
or similar is not disturbing.
Other problems, such as low gap opacity, semi-transparent labels when
using gap detection, or black marks that do not absorb the light suffi -
ciently, can also be identifi ed by changing the gain and drive manually.
If there is no dust or other things mechanically interfering with the LSS,
check the hardware by changing fi rst the gain and secondly the drive
values. If the cursor is positioned in either the extreme left or right position
and refuses to move, check cables, replace the LSS, or—as a last resort—
replace the CPU board.
Sensitivity Adjustment
The LSS should always be adjusted when the user changes to another
brand (sometimes even a new batch) of media, and when a defective sensor
has been replaced. This is especially the case with self-adhesive labels on
liner, because the transparency of the liner may vary and the difference
between labels and gaps may be too small. Before starting the adjust-
ment, check that both the upper and lower sensor are clean and free from
obstructions and that the edge guides are adjusted so as to guide the media
with a minimum of play. Also check that both parts of the LSS are in the
same lateral position and aligned with any gaps or black marks.
Fingerprint only
As standard, there are four ways to adjust the LSS:
• Performing a TESTFEED by simultaneously pressing the "Shift" and
"Feed" keys on the printer's built-in keyboard.
• Selecting the TESTFEED option in Intermec Shell.
• Selecting the TESTFEED option in the Setup Mode.
• Executing a TESTFEED statement in a Fingerprint program.
The printer feeds out 1.5 times the set label length or less while testing
all levels of the LSS at each millimeter of media feed. The LSS is adjusted
according to the result of the check and a full label is fed out according to
the present feedadjust setup.
EasyCoder PX4i and PX6i Service Manual 79