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 ..............................................................................................................................................................8–10
Testing for dust in camera module..................................................................................................................................8–10
Testing camera image sharpness.....................................................................................................................................8–11
Dirty camera lens protection window............................................................................................................................8–12
Image bit errors.....................................................................................................................................................................8–13
Camera troubleshooting flowcharts......................................................................................................................................8–13
Camera hardware failure message troubleshooting.................................................................................................8–13
Camera baseband HW troubleshooting.........................................................................................................................8–15
Camera viewfinder troubleshooting...............................................................................................................................8–17
Bad camera image quality troubleshooting.................................................................................................................8–18
List of Figures
Figure 76 Blurred image. Target too close..............................................................................................................................8–6
Figure 77 Blurring caused by shaking hands.........................................................................................................................8–7
Figure 78 Noisy image taken in +70 degrees Celsius..........................................................................................................8–8
Figure 79 Image taken against light.........................................................................................................................................8–8
Figure 80 Flicker in an image; object illuminated by strong fluorescent light...........................................................8–9
Figure 81 A lens reflection effect caused by sunshine........................................................................................................8–9
Figure 82 Good image taken indoors.....................................................................................................................................8–10
Figure 83 Good image taken outdoors..................................................................................................................................8–10
Figure 84 Effects of dust on optical path..............................................................................................................................8–11
Figure 85 Image taken with clean protection window....................................................................................................8–13
Figure 86 Image taken with greasy protection window.................................................................................................8–13
Figure 87 Bit errors caused by JPEG compression..............................................................................................................8–13
Figure 88 Example of differential amplitude. The differential amplitude in this figure is (96 mV + 140 mV) / 2 =
118mV..............................................................................................................................................................................................8–16
Figure 89 Example of common mode voltage. The common mode voltage in this figure is (980 mV + 860 mV) /
2 = 920mV.......................................................................................................................................................................................8–16
RM-1
Camera Module Troubleshooting Nokia Customer Care
Issue 1 Company Confidential Page 8–3
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