User Guide

Table of Contents
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
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
RM-42
Camera Module Troubleshooting Nokia Customer Care
9241872 (Issue 1) Company Confidential Page 8–3
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