Replacing I-Mark/ Edge Sensor - SATO 9001226(A) Service Manual

7.17 REPLACING I-MARK/ EDGE SENSOR

The I-Mark/ Edge sensor assemblies may need replacement if cleaning does not improve their functionality.
Before proceeding, switch off the printer and remove the main cover, left housing cover and the top left
1.
housing cover to gain access to the internal (electrical and mechanism) hardware. Refer to Section 7.1
Removal of Housing cover for details.
Unscrew five screws to detach the Main (CONT) PCB bracket from the printer frame. Refer to Section
2.
7.6 Replacing Torque Limiter (Ribbon Unwinder) for details.
Turn the purple head lock lever to release the printer head , press the tab of the purple pitch sensor
3.
guide and slide it out.
To replace Edge sensor (upper) board
Under the print head assembly , remove the screw (1) securing the Upper Edge sensor assembly (2) to
4.
the printer frame.
From the mechanism side of the printer, disconnect the wiring harnesses of the Upper Edge sensor
5.
assembly (2) and carefully remove the Upper Edge sensor assembly (2) from the print head assembly
side.
Remove the tight screw (3) on the Upper Edge sensor assembly (2) and remove the Sensor holder
6.
cover (4).
Remove and replace the defective Upper Edge sensor board (6) from the Sensor holder (5).
7.
Reverse the above procedures for reassembly.
8.
Insert the wiring harness firmly.
9.
After replacement, adjust the Edge sensor condition based on Section 6.9.4 Edge Sensor Sensitivity
10.
Adjustment .
Detach the Pitch sensor guide
Tab
Pitch sensor guide
TG3 Series Service Manual
Section 7: Replacement Procedures
1 3
2
Print Head ASSY
Screwdriver
5
6
Page 7-27
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