User Guide

Table of Contents
Introduction to camera module troubleshooting...............................................................................................8–5
The effect of image taking conditions on image quality...................................................................................8–6
Camera construction............................................................................................................................................8–10
Image quality analysis ........................................................................................................................................8–12
Testing for dust in camera module...............................................................................................................8–12
Testing camera image sharpness..................................................................................................................8–13
Dirty camera lens protection window..........................................................................................................8–14
Image bit errors..............................................................................................................................................8–14
Camera troubleshooting flowchart....................................................................................................................8–15
Camera hardware failure message troubleshooting...................................................................................8–15
List of Figures
Figure 53 Blurred image. Target too close..........................................................................................................8–6
Figure 54 Blurring caused by shaking hands.......................................................................................................8–7
Figure 55 Near objects get skewed when taking images from a moving vehicle...........................................8–7
Figure 56 Noisy image taken in +70 degrees Celsius.........................................................................................8–8
Figure 57 Image taken against light....................................................................................................................8–8
Figure 58 Flicker in an image; object illuminated by strong fluorescent light................................................8–9
Figure 59 A lens reflection effect caused by sunshine........................................................................................8–9
Figure 60 Good image taken indoors.................................................................................................................8–10
Figure 61 Good image taken outdoors..............................................................................................................8–10
Figure 62 Camera module cross section and assembly principle....................................................................8–11
Figure 63 Camera module bottom view including serial numbering.............................................................8–11
Figure 64 Effects of dust on optical path...........................................................................................................8–12
Figure 65 Image taken with clean protection window....................................................................................8–14
Figure 66 Image taken with greasy protection window.................................................................................8–14
Figure 67 Bit errors caused by JPEG compression.............................................................................................8–14
RM-86
Camera Module Troubleshooting Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 8 –3
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