TEC SX4T - B B/W Direct Thermal User Manual page 310

10. MAJOR UNIT REPLACEMENT
5) Remove the SMW-3x6 screw to detach the ribbon end sensor and the ribbon end sensor cover
from the ribbon end sensor plate.
Ribbon End Sensor Plate
6) Replace the ribbon end sensor with a new one, then reassemble in the reverse order of removal.
At this time, take care of the following points.
When reassembling, make sure that the ribbon end sensor was attached to the ribbon end
sensor plate in the correct direction.
Assemble the ribbon end sensor cover and the ribbon end sensor so that the photo coupler is
positioned at the center of the round hole of the cover.
Be careful not to damage the sensor.
Make sure that the sensor harness doesn't appear out of the printer block. If so, the sensor
harness may touch the ribbon and the media causing a print failure.
Printer Block
Ribbon End Sensor
10- 37
EO18-33012A
10.14 RIBBON END SENSOR
Ribbon End Sensor Cover
SMW-3x6 Screw
Photo Coupler
Ribbon End Sensor Ass'y
Sensor Harness