Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 531)

531
Sensor Cleaning
o While cleaning the sensor, never do any of the following. If the power
is cut off , the shutter will close and the refl ex mirror will go back down.
These may result in damaging the image sensor, shutter curtains, and
refl ex mirror.
• Setting the power switch to <
2
>.
• Removing or inserting the battery.
o The surface of the image sensor is extremely delicate. Clean the sensor with
care.
o Use a plain blower without any brush attached. A brush can scratch the
sensor.
o Do not insert the blower tip inside the camera beyond the lens mount. If the
power is turned off , the shutter will close and the shutter curtains or refl ex
mirror may get damaged.
o Never use pressurized air or gas to clean the sensor. Pressurized air may
damage the sensor, and sprayed gas may freeze on the sensor and scratch it.
o If the battery level becomes low while cleaning the sensor, the beeper will
sound as a warning. Stop cleaning the sensor.
o If a smudge that cannot be removed with a blower remains, having the sensor
cleaned by a Canon Service Center is recommended.