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

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

Image quality analysis ...............................................................................................................................................................8-11

Possible faults in image quality.........................................................................................................................................8-11

Testing for dust in camera module...................................................................................................................................8-11

Testing camera image sharpness......................................................................................................................................8-12

Effects of dirty or defective camera lens protection window...................................................................................8-13

Image bit errors......................................................................................................................................................................8-15

Faulty pixels in images..........................................................................................................................................................8-16

Flash photography problems..............................................................................................................................................8-17

Camera troubleshooting flowcharts.......................................................................................................................................8-18

Camera hardware failure message troubleshooting..................................................................................................8-18

Camera viewfinder troubleshooting................................................................................................................................8-20

Bad camera image quality troubleshooting..................................................................................................................8-21

Camera LED flash troubleshooting....................................................................................................................................8-23

List of Figures

Figure 79 Only center part of image is in focus due to limited depth of focus...........................................................8-6

Figure 80 Blurring caused by shaking hands.........................................................................................................................8-7

Figure 81 Near objects get skewed when taking images from a moving vehicle.....................................................8-7

Figure 82 Noisy image taken in +70 degrees Celsius..........................................................................................................8-8

Figure 83 Image taken against light.........................................................................................................................................8-9

Figure 84 Flicker in an image; object illuminated by strong fluorescent light...........................................................8-9

Figure 85 A lens reflection effect caused by sunshine......................................................................................................8-10

Figure 86 Good image taken indoors.....................................................................................................................................8-10

Figure 87 Good image taken outdoors..................................................................................................................................8-11

Figure 88 Effects of dust on optical path..............................................................................................................................8-12

Figure 89 Image taken with clear protection window.....................................................................................................8-14

Figure 90 Image taken with greasy protection window.................................................................................................8-14

Figure 91 Image of point light sources taken with a clean protective window......................................................8-15

Figure 92 Image of point light sources taken with a dirty (finger print) protective window.............................8-15

Figure 93 Bit errors caused by JPEG compression..............................................................................................................8-16

Figure 94 Enlargement of a hot pixel.....................................................................................................................................8-17

Figure 95 Light from the flash has reflected on particles in front of the camera....................................................8-18

9241872 (Issue 1)

Table of Contents

Company Confidential

Nokia Customer Care

Page 8-3

Table of Contents