SATO WS408TT Technical Manual page 131

9 Technical Drawings Main Board Diagram
Media Sensor
A two-layer PCBA consists of a reflective and a transmissive sensor, which is
designed for media detection.
Thermal Printhead (TPH)
It consists of a line of tiny resistors that is electronically controlled to produce heat
for printing. For thermal transfer printing, a TPH heats up and melts the ink from a
ribbon to transfer it onto the thermal paper. The ink permanently adheres to the
paper after it cools. For direct thermal printing, a TPH directly heats up an area of
the thermal paper to produce an image.
Stepper Motor
A stepper motor rotates certain degrees in each step-in response to an electronic
pulse.
Cutter or Dispenser (Optional)
A cutter is a guillotine cutter which automatically cuts the printed label. There are
two cutting types: full and partial. A dispenser automatically removes the liner
from a printed label. The sensor on the dispenser detects if the peeled label is
taken away.
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