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 ............................................................................................................................................. 8–12
Camera troubleshooting flowcharts.................................................................................................................. 8–14
Main camera troubleshooting....................................................................................................................... 8–14
Secondary camera troubleshooting............................................................................................................. 8–15
Camera bb troubleshooting .......................................................................................................................... 8–16
Flash LED troubleshooting flowcharts............................................................................................................... 8–18
Flash LED troubleshooting............................................................................................................................. 8–18
Indicator LED troubleshooting...................................................................................................................... 8–20
List of Figures
Figure 67 Blurred image. Target too close. .........................................................................................................8–6
Figure 68 Blurring caused by shaking hands ......................................................................................................8–7
Figure 69 Near objects get skewed when taking images from a moving vehicle...........................................8–7
Figure 70 Noisy image taken in +70 degrees Celsius .........................................................................................8–8
Figure 71 Image taken against light; the actual object is dark.........................................................................8–8
Figure 72 Flicker in an image; uniform object illuminated by strong fluorescent light.................................8–9
Figure 73 A lens reflection effect caused by sunshine........................................................................................8–9
Figure 74 Good image taken indoors................................................................................................................ 8–10
Figure 75 Good image taken outdoors ............................................................................................................. 8–10
Figure 76 Effects of dust on optical path .......................................................................................................... 8–11
Figure 77 Image taken with clean protection window................................................................................... 8–12
Figure 78 Image taken with greasy protection window ................................................................................ 8–12
Figure 79 Bit errors caused by JPEG compression............................................................................................ 8–13
Figure 80 L4420 LED flash SMPS coil.................................................................................................................. 8–19
Figure 81 R4424-2 LED flash voltage................................................................................................................. 8–19
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Camera Module Troubleshooting Nokia Customer Care
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