B-452-Hs Model - TEC B-450 SERIES Maintenance Manual

2. MAJOR UNIT REPLACEMENT

2.6.2 B-452-HS Model

Replacing the Sensor PCB (TR)
1) Push down the head release lever R to open the print head block. (Refer to Section 2.4.)
2) Set the sensor knob to position 5 and lift the sensor holder.
3) Push out the rivet from the back side of the sensor holder and release the sensor PCB cover from
the sensor holder.
Rivet
Sensor PCB Cover
4) Slide the sensor PCB (TR) to the left side to release it from the sensor holder, and disconnect the
harness from the sensor PCB (TR).
Connector
Harness
5) Replace the sensor PCB (TR) with a new one, and then reassemble in the reverse order of
removal.
NOTE: Secure the sensor PCB (TR) with the rivet together with the sensor PCB cover and slide
button top.
6) After replacement, refer to Section 6.7 THRESHOLD SETTING in this manual to make a sensor
adjustment.
Sensor Knob
Position
"5"
Sensor Holder
2-15
2.6 REPLACING THE MEDIA SENSOR
Sensor Holder
Sensor PCB (TR)
EO18-33003A
Rivet
Fig. 2-24
Fig. 2-25