Sony PCM-A10 High-Resolution Audio Recorder - Manual (Page 34)

Do not put the tip of a blower into the cavity beyond the lens mount area, so that the tip of the blower does not touch the image
sensor.
When cleaning the image sensor with a blower, do not blow too hard. If you blow the sensor too hard, the inside of the product
may be damaged.
If the dust remains even after you cleaned the product as described, consult the service facility.
During cleaning, the filter glass on the image sensor makes a vibrating sound. This is not a malfunction.
Cleaning may be performed automatically when the power is turned off.
Related Topic
Attaching/removing a lens
Anti-dust Function
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