(without black mark) is placed on the black mark sensor.
FAILED
Stock AD = 190
If yes, please follow the following steps to calibrate sensor sensitivity agian.
1.Press the button 
under “” icon to return to Bline Sensor menu.
2.Press the button 
under “]” icon to enter “Auto Bline” menu.
3.After insert paper on the black mark sensor, press the button 
under “V” icon to continue.
4.Press the button 
under “+” icon to increase Stock AD value by
50.And press the button 
under “V” icon to calibrate the sensor sensitivity.
Bline Calibrate 240
+ - V
4.1.2.2.2 Manual Bline:
If Auto Bline sensor calibration successfully, it’s not necessary to calibrate the sensor manually. This function is used to fine tune sensor sensitivity. When enter the [Manual Bline] option, you will see following message.
Gap Sensor
Stock AD = 153
Intension = 212
+ - V
Stock AD on label
Gap Sensor
Stock AD = 249
Intension = 212
+ - V
Stock AD on black
Press the 
button under “+” and
sensor intension, and press the 
under “V” to set the value to printer
When adjust the sensor sensitivity manually, we can get the different Stock AD on black mark and paper in each sensor intension. And the difference between these two values must be larger than 50 levels then printer can register the label correctly.
4.1.2.3 Continuous:
31