A CCD cleaning includes a number of operations to ensure that the camera performance is in accordance with the factory specifications - no matter the age of the camera. This is what we do:
Firstly, the IR-filter which protects the CCD is removed. The position of the CCD can then be measured and, if necessary, adjusted.
A focus calibration is followed by very careful cleaning of the CCD with compressed air, cleaning fluid and tissues.
The unit is then mounted on a test bench. A test shot is made, with the lens focus setting at infinity, through an illuminated piece of opal glass mounted in the filter thread of the lens. The unprocessed RAW-file is inspected on a monitor to ensure that that there is no residue of grease, fluid or dust on the sensor.
A mounting seal is attached and another test shot is made and inspected. The IR-filter is now unwrapped, cleaned on both surfaces and mounted.
The camera now undergoes a full factory test to ensure that the camera still performs according to the factory specifications - no matter the age of the camera. If needed, extra calibrations will be done, or parts will be replaced to ensure correct performance. You will be contacted if the cost of such replacements makes the service charge exceed the current cost exstimate limit.
After passing all tests, the camera is ready to be returned.