Canon EOS Digital Rebel XT EF-S 18-55 Kit EOS DIGITAL Rebel XT / EOS 350D Inst - Page 39

3 Cleaning the CMOS sensorN The image sensor is like the film in a film camera.If any dust or other foreign matter adheres to the image sensor, it may show up as a dark speck in the images. To avoid this, follow the procedure below to clean the image sensor. Note that the image sensor is a very delicate component. If possible, you should have it cleaned by a Canon Service Center. While you clean the image sensor, the camera must be turned on. Using the AC Adapter Kit ACK-DC20 (optional, see page 158) is recommended. If you use a battery, make sure the battery level is sufficient. Before cleaning the sensor, detach the lens from the camera. 1 Install the DC Coupler (p.24) or a battery and set the power switch to . 2 Select [Sensor cleaning]. ¡ Select the [b] tab. ¡ Press the key to select [Sensor cleaning], then press . s If you are using a battery with sufficient power, the screen shown in step 3 will appear. ¡ If the battery is exhausted, a warning message will appear and you will not be able to proceed further. Either recharge the battery or use a DC coupler and start from step 1 again. 3 Select [OK]. ¡ Press the key to select [OK], then press . s In a moment, the mirror will lockup and the shutter will open. s "CLEA n" will blink on the LCD panel. 39