About "Sensor Cleaning: Manual - Canon EOS 400D Digital Instruction Manual

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About "Sensor cleaning: Manual"N
Under the [b] tab, [Sensor cleaning: Manual] is mainly for use by
Canon service personnel. Dust which could not be eliminated by the
Self Cleaning Sensor Unit can be directly cleaned off the sensor.
Therefore, you normally need not use this feature.
The surface of the imaging sensor is extremely delicate. If the
sensor needs to be cleaned directly, have it done by a Canon
Service Center.
However, if you want to clean the sensor yourself, follow the procedure
below:
While cleaning the sensor, never do any of the following. If the
power is cut off, the shutter will close and it may damage the
shutter curtains and imaging sensor.
• Setting the power switch to <2>, opening the CF card slot
cover, or opening the battery compartment cover.
Never use canned air or gas to clean the sensor.
For the power source, using the AC Adapter Kit (p.154) is recommended.
If you use a battery, make sure it is fully recharged.
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Select [Sensor cleaning: Manual].
1
Under the [b] tab, select [Sensor
cleaning: Manual], then press <0>.
Select [OK].
2
Select [OK], then press <0>.
In a moment, the mirror will lockup
and the shutter will open to expose
the sensor. You can now clean the
sensor.
Exit the cleaning.
3
Set the power switch to <2>.