Canon imagePROGRAF W6200, Service Manual, Page: 130 / 311

e) Printhead maintenance unit
The printer performs cleaning operations of the printhead at the carriage
homeposition.
In the wiping operation, the printhead installed in the carriage are wiped as the
purge motor rotates when the carriage is stopped at the carriage homeposition. The
maintenance jets are the carriage passes through the maintenance jet tray, located
on the right side of the platen, while the carriage is moving forward. The suction
operation is performed using the suction cap of the purge unit.
f) Gap adjustment unit
The printhead height adjustment lever located on the right side of the carriage works
in coordination with the height adjustment cam. The height adjustment rollers
located at the bottom-right edge of the carriage front are moved up and down by this
mechanism, and this moves the head holder position up or down to change the gap
between the face of the printhead and the media.
g) Media sensor unit
The media sensor located at the bottom left of the carriage consists of an LED and
photosensor.
h) Internal temperature detection
A thermistor for measuring the internal temperature is installed on the head relay
PCB on the rear of the head holder.
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W6200
Part 4: Technical Reference