Nokia 6260 RM-25 Service Manual page 223

Mobile terminal

Table of Contents

RM-25

Camera module troubleshooting

Introduction to camera module troubleshooting...............................................................................................................8-5

The effect of image taking conditions on image quality..................................................................................................8-6

Image quality analysis ..............................................................................................................................................................8-10

Testing for dust in camera module..................................................................................................................................8-10

Testing camera image sharpness.....................................................................................................................................8-11

Image bit errors.....................................................................................................................................................................8-12

Camera troubleshooting flowcharts......................................................................................................................................8-13

Camera hardware troubleshooting.................................................................................................................................8-13

Camera hardware failure troubleshooting....................................................................................................................8-15

Bad image quality troubleshooting.................................................................................................................................8-16

List of Figures

Figure 149 Sharpness of the picture is worse on the edges than in the center.........................................................8-6

Figure 150 Blurring caused by shaking hands. Geometrical barrel distortion in the background.......................8-7

Figure 151 Near objects get skewed when taking images from a moving vehicle...................................................8-7

Figure 152 Noisy image taken in +70 degrees Celsius........................................................................................................8-8

Figure 153 Image taken against light......................................................................................................................................8-8

Figure 154 Flicker in an image; object illuminated by strong fluorescent light.........................................................8-9

Figure 155 A lens reflection effect caused by sunshine......................................................................................................8-9

Figure 156 Good image taken indoors..................................................................................................................................8-10

Figure 157 Good image taken outdoors...............................................................................................................................8-10

Figure 158 Effects of dust on optical path............................................................................................................................8-11

Figure 159 Bit errors caused by JPEG compression............................................................................................................8-13

9235618 (Issue 2)

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Company Confidential

Nokia Customer Care

Page 8-3

Table of Contents