Nokia 6260 RM-25 Service Manual

Nokia 6260 RM-25 Service Manual Manual pdf 230 page image

Examples of good quality imagesFigure 156 Good image taken indoorsFigure 157 Good image taken outdoorsImage quality analysisTesting for dust in camera moduleContextFor detecting these kinds of problems, take an image of a uniform white surface and analyse it in full resolution.A good quality PC monitor is preferred for analysis. Search carefully, since finding these defects is not alwayseasy. Figure "Effects of dust on optical path" is an example image containing easily detectable dust problems.When taking a white image, use uniformly lightened white paper or white wall. One possibility is to use uniformlight but in this case make sure that the camera image is not flickering when taking the test image. In caseflickering happens, try to reduce illumination level. Use JPEG image format for analysing, and set the imagequality parameter to ‘High Quality’.Black spots in an image are caused by dirt particles trapped inside the optical system. Clearly visible and sharpedged black dots in an image are typically dust particles on the image sensor. These spots are searched for inthe manufacturing phase, but it is possible that the camera body cavity contains a particle, which may moveRM-25Nokia Customer Care Camera module troubleshootingPage 8–10 Company Confidential 9235618 (Issue 2)Copyright ©2005 Nokia. All Rights Reserved.