User Guide

Table of Contents
Introduction to camera module troubleshooting ..............................................................................................5–5
The effect of image taking conditions on image quality...................................................................................5–6
Camera construction........................................................................................................................................... 5–10
Image quality analysis ....................................................................................................................................... 5–12
Testing for dust in camera module .............................................................................................................. 5–12
Testing camera image sharpness................................................................................................................. 5–13
Dirty camera lens protection window ......................................................................................................... 5–14
Image bit errors ............................................................................................................................................. 5–14
Camera troubleshooting..................................................................................................................................... 5–15
Camera hardware failure troubleshooting....................................................................................................... 5–15
Camera baseband hardware failure troubleshooting ..................................................................................... 5–16
List of Figures
Figure 32 Blurred image. Target too close. .........................................................................................................5–6
Figure 33 Blurring caused by shaking hands ......................................................................................................5–7
Figure 34 Near objects get skewed when taking images from a moving vehicle...........................................5–7
Figure 35 Noisy image taken in +70 degrees Celsius .........................................................................................5–8
Figure 36 Image taken against light....................................................................................................................5–8
Figure 37 Flicker in an image; object illuminated by strong fluorescent light................................................5–9
Figure 38 A lens reflection effect caused by sunshine........................................................................................5–9
Figure 39 Good image taken indoors................................................................................................................ 5–10
Figure 40 Good image taken outdoors ............................................................................................................. 5–10
Figure 41 Camera module cross section and assembly principle................................................................... 5–11
Figure 42 Camera module bottom view including serial numbering............................................................ 5–11
Figure 43 Effects of dust on optical path .......................................................................................................... 5–12
Figure 44 Image taken with clean protection window................................................................................... 5–14
Figure 45 Image taken with greasy protection window ................................................................................ 5–14
Figure 46 Bit errors caused by JPEG compression............................................................................................ 5–14
RM-244
Camera Module Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 5 –3
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