Abstract: Disclosed is a method of adjusting a scanner for scanning of an original, the scanner comprising an image sensor and a light source for emitting light, the method comprising the steps of: a) moving the image sensor in order for it to be located at a predefined scanning position by means of a movable mechanical member; b) determining the difference between the scanning position and the predefined scanning position; where the method further comprises: determining the difference between the scanning position and the predefined scanning position by detecting radiation from at least one fix-point having a fixed position relative to the image sensor.