DPP-255 Mobile Printer User Manual
Page 21 of 48
UM-00017 Version: A
Sensors
1. Paper End Sensor
The Paper-End Sensor is installed into the paper path where the photo-interrupter detects that
there is paper in the printer. Once the Paper End Sensor sends signal to indicate the paper roll is
empty, the printer stops printing and the Status LED turns red. As soon as the paper-end strip
appears, the paper roll should be replaced.
Once the paper has been replaced, the printer cancels the error status and resumes printing.
2. Open Cover Sensor
The Open Cover Sensor detects when the cover is open. Once the sensor detects the Open Cover
signal, the printer stops printing and goes offline. The Status LED turns red.
Once the cover has been closed, the printer cancels the error status and resumes printing.
3. Thermistor
The Thermistor that is built into the print head detects the temperature of the print head. If printing
at a high printing rate for a long time, the print head temperature rises and the head may become
overheated. To prevent overheating, the printer stops printing when the temperature is beyond a
certain level, and the Status LED blinks red.
4. Peeled Label Sensor
The Peeled Label Sensor detects whether there is issued label by printing or feeding. Once the
sensor detectes the label paper signal, the printer stops printing and goes offline, the Status LED
turns red. Pull out the label paper, the printer goes back online and cancels the print stop mode.
