Canon EOS-1D C - Manual (Page 301)

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Dust that could not be removed by the automatic sensor cleaning can
be removed manually with a blower, etc. Before cleaning the sensor,
detach the lens from the camera.
The surface of the image sensor is extremely delicate. If the
sensor needs to be cleaned directly, having it done by a Canon
Service Center is recommended.
1
Select [Sensor cleaning].
Under the [53] tab, select [Sensor
cleaning], then press <0>.
2
Select [Clean manually].
Select [Clean manually], then press
<0>.
3
Select [OK].
Select [OK], then press <0>.
X In a moment, the reflex mirror will
lockup and the shutter will open.
“CLn” will blink on the top LCD panel.
4
Clean the sensor.
5
End the cleaning.
Set the power switch to <2>.
3
Manual Sensor Cleaning
If you use a battery, make sure it is fully charged.
As power source, using the AC Adapter Kit ACK-E4 (sold separately) is
recommended.
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