Sony DSLR-A900 User Manual

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If dust or debris enters the camera and lands on the image sensor, it may 
appear on the photo image, depending on the shooting environment. If 
there is dust on the image sensor, use a commercially available blower and 
clean the image sensor following the steps below. You can easily clean the 
image sensor using only the blower and the anti-dust function.
Notes
• Cleaning can be performed only when the battery level is 
 (three remaining 
battery icons) or more. Low battery power during cleaning can cause damage to the 
shutter. The cleaning should be completed quickly. The use of an AC Adaptor/
Charger (not supplied) is recommended.
• Do not use a spray blower because it may scatter vapor inside the camera body.
Cleaning the image sensor
1
Confirm that the battery is fully charged (page 19).
2
Press the MENU button, then 
select  
with 
b
/B on the 
multi-selector.
MENU button
3
Select [Cleaning mode] with v/V 
on the multi-selector, then press 
the center of the multi-selector.
The message “After cleaning, turn 
camera off. Continue?” appears.
4
Select [OK] with v on the multi-selector, and press the center 
of the multi-selector.
After the image sensor vibrates for a short time, the mirror in front is lifted.
5
Detach the lens (page 21).