12
Bluetooth
module
error
Flicker for five
times and off
for 1s
Use the setting tools
to set the matching
Bluetooth module or
return
to
manufacturer
Chapter 4 Other Information
4.1 Commands Manual
<SP-TL21N Commands Manual> is a technical manual for engineer to
develop printer utility, and users can ask our company for it.
4.2 Description of pre-printed Black Mark
If user use pre-printed black mark to locate the receipt, please be sure to abide
by the following pre-printed black mark regulation when print the black mark
paper. Otherwise, it will cause that the printer cannot identify the black mark.
The black mark pre-print regulations are as below:
Printing Position: As the picture above, the black mark should be printed on
the right edge of the side of words
Width range: width≥7mm
Height range: 4mm≤height≤6mm
Reflectivity of infrared ray : <10% (infrared ray reflectivity of other parts of the
black mark paper is>65%)
HPS: It is the distance between edges of black mark and edges of print
beginning position.
4.5mm≤Hps≤6.5mm
