Feed Gap Sensor (Led) And Black Mark Sensor (Lower Side) - Toshiba B-852-R Series Maintenance Manual

2. MAJOR UNIT REPLACEMENT

2.8.2 Feed Gap Sensor (LED) and Black Mark Sensor (Lower Side)

1) Remove the platen holder R, platen holder L, platen, and strip plate from the printer
2) Remove the SMW-4x8 screw to detach the front cover from the printer.
3) Unhook the two springs.
4) Remove the two SMW-3x6 screws to detach the sensor block from the pritner.
5) Turn over the sensor block.
6) Pull up the two tabs of the sensor case cap to remove it from the sensor case.
7) Remove the feed gap sensor (LED) and black mark sensor (lower side) from the sensor case,
and disconnect the media sensor harness from each sensor.
Tab
Black Mark Sensor
(Lower Side)
Front side of
the printer
Sensor Case
8) Replace the sensor with a new one, then reassemble in the reverse order of removal.
To CN15 on the
CPU PC board
ass'y
Spring
A
SMW-3x6 Screw
A
Sensor Block
A
Sensor Case Cap
Feed Gap Sensor (LED)
Hook
2-17
2.8 REPLACING THE MEDIA SENSOR
Spring
SMW-4x8 Screw
Front Cover
Media Sensor Harness
EO18-33018