TEC B-450 SERIES Maintenance Manual page 22

2. MAJOR UNIT REPLACEMENT
Replacing the Sensor PCB (LED)
1) Push down the head release lever R to open the print head block. (Refer to Section 2.4.)
2) Push the sensor release lever to the direction indicated by the arrow and lift the sensor block.
NOTE: In the above picture, the head release lever R is removed to indicate the position of the
sensor release lever clearly. In the actual procedure, the head release lever R does not
have to be removed.
3) Set the media sensor knob to position 5.
4) Lift the sensor block by the tab.
Sensor Block
Sensor Block
2-16
Sensor Release Lever
Position "5"
Sensor Knob
Rivet
EO18-33003A
2.6 REPLACING THE MEDIA SENSOR
Fig. 2-26
Tab
Fig. 2-27