UBI EasyCoder 501, Техническое руководство

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UBI EasyCoder 501 – Technical Manual
The remaining three potentiometers are situated along the top edge
of the CPU board and can only be accessed after the left-hand cover
plate has been removed. Normally, they do not require any adjust-
ment.
❑ Label Stop Sensor Adjustment:
This potentiometer is used in connection with the printer's Setup
Mode for adjusting the sensitivity of the label stop sensor, e.g.
according to the transparency of various brands of backing
paper. In most cases, it will be sufficient to use the adjustment
method offered in the Setup Mode and the Testfeed facility.
❑ Label-Taken Sensor Adjustment
The label-taken sensor (optional) is situated above the paper
outfeed slot and detects if a label has not been removed from the
outfeed area. Thereby, the printer can be programmed not to
print any more copies before the last copy has been removed.
The operation of this sensor depends to a large extent on the
reflectivity of the labels (e.g. glossiness, colour etc.). Thus, it
may sometimes require adjustment when switching between
different types of labels.
The light intensity of the emitter can be changed between two
values by means of fitting or removing a strap on P-607 (strap
fitted = increased intensity).
❑ Ribbon End Sensor Adjustment:
The ribbon end sensor is situated at the rear part of the printing
mechanism. It emits a narrow beam of light and detects when
there is no more thermal transfer ribbon left to stop the light from
being reflected back from the mirror plate. This sensor is factory-
adjusted and should normally not require any further adjust-
ment, except after possible replacement.
The light intensity of the emitter can be changed between two
values by means of fitting or removing a strap on P-604 (strap
fitted = increased intensity).
Obviously, this sensor is omitted if the printer is not fitted with
any transfer ribbon mechanism.
Before changing the setting of a potentiometer, always make
sure that the corresponding sensor is clean, free from obstruc-
tions (e.g. pieces of labels or adhesive residue), and properly
aligned. In case of the ribbon end sensor, also check the mirror
plate.
ELECTRONICS, cont'd.
Potentiometers, cont'd.
Caution!
Adjustments must be done with
utmost care. Since the power must
be on during the adjustment pro-
cedure, precautions must be taken
to avoid any risk of electrical shock
or short-circuits! Use non-con-
ductive tools and keep fingers
away from the CPU board, espe-
cially the area behind it, where the
mains inlet and main switch are
situated.