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
Main (back) camera troubleshooting................................................................................................................ 8–15
Main camera troubleshooting....................................................................................................................... 8–15
Camera flash LED troubleshooting ............................................................................................................... 8–16
Camera indicator LED troubleshooting ........................................................................................................ 8–17
Secondary (front) camera troubleshooting...................................................................................................... 8–18
Secondary camera troubleshooting............................................................................................................. 8–18
Camera hardware failure troubleshooting....................................................................................................... 8–19
List of Figures
Figure 61 Blurred image. Target too close. .........................................................................................................8–6
Figure 62 Blurring caused by shaking hands ......................................................................................................8–7
Figure 63 Near objects get skewed when taking images from a moving vehicle...........................................8–7
Figure 64 Noisy image taken in +70 degrees Celsius .........................................................................................8–8
Figure 65 Image taken against light....................................................................................................................8–8
Figure 66 Flicker in an image; object illuminated by strong fluorescent light................................................8–9
Figure 67 A lens reflection effect caused by sunshine........................................................................................8–9
Figure 68 Good image taken indoors................................................................................................................ 8–10
Figure 69 Good image taken outdoors ............................................................................................................. 8–10
Figure 70 Camera module cross section and assembly principle................................................................... 8–11
Figure 71 Camera module bottom view including serial numbering............................................................ 8–11
Figure 72 Effects of dust on optical path .......................................................................................................... 8–12
Figure 73 Image taken with clean protection window................................................................................... 8–14
Figure 74 Image taken with greasy protection window ................................................................................ 8–14
Figure 75 Bit errors caused by JPEG compression............................................................................................ 8–14
RM-176
Camera Module Troubleshooting Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 8 –3
Copyright © 2007 Nokia. All rights reserved.