Canon EOS 550D Instruction Manual page 64

Manual Sensor Cleaning*
Dust which could not be removed by the automatic sensor cleaning can
be removed manually with a blower, etc=
The surface of the image sensor is e×tremely delicate, if the
sensor needs to be cleaned directly, having it done by a Canon
Service Center is recommended.
Before cleaning the sensor, detach the lens from the camera.
Select [Sensor eJeaning].
® Under the [_':] tab, select [Sensor
cleaning], then press <_>.
_),_,_Select [Clean manually].
® Select [CJean manually], then press
,3
Select [OK].
® Select [OK], then press <_>=
_y,, i n a moment, the reflex mirror will
Iockup and the shutter will open.
_,,_ End the cleaning.
® Set the power switch to <OFF >=
separately) is recommended,
_ If you use a battery, make su[e it is fully recharged, If the battery grip wit h
size-A_LR6 batteries is attached, manual sensor cleaning will not be
possible.
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