Nokia RM-824 - Table of Contents

Table of Contents
Introduction to camera module troubleshooting ............................................................................................. 5–5
The effect of image taking conditions on image quality.................................................................................. 5–6
Image quality analysis ...................................................................................................................................... 5–10
Possible faults in image quality................................................................................................................... 5–10
Testing for dust in camera module ............................................................................................................. 5–11
Testing camera image sharpness................................................................................................................ 5–12
Effects of dirty or defective camera lens protection window................................................................... 5–13
Faulty pixels in images ................................................................................................................................. 5–14
Flash photography problems....................................................................................................................... 5–15
Camera troubleshooting flowcharts................................................................................................................. 5–16
No recognizable viewfinder image ............................................................................................................. 5–16
Bad image quality troubleshooting ............................................................................................................ 5–16
Main camera, camera flash and front camera troubleshooting.................................................................... 5–17
Main camera troubleshooting...................................................................................................................... 5–17
Camera flash troubleshooting ..................................................................................................................... 5–19
Front (secondary) camera troubleshooting................................................................................................ 5–21
List of Figures
Figure 16 Only center part of image is in focus due to limited depth of focus .............................................. 5–6
Figure 17 Blurring caused by shaking hands ..................................................................................................... 5–7
Figure 18 Near objects get skewed when taking images from a moving vehicle.......................................... 5–7
Figure 19 Noisy image taken in +70 degrees Celsius ........................................................................................ 5–8
Figure 20 Image taken against light................................................................................................................... 5–8
Figure 21 Flicker in an image; object illuminated by strong fluorescent light............................................... 5–9
Figure 22 A lens reflection effect caused by sunshine....................................................................................... 5–9
Figure 23 Good image taken indoors............................................................................................................... 5–10
Figure 24 Good image taken outdoors ............................................................................................................ 5–10
Figure 25 Effects of dust on optical path ......................................................................................................... 5–11
Figure 26 Image taken with clear protection window .................................................................................. 5–13
Figure 27 Image taken with greasy protection window ............................................................................... 5–13
Figure 28 Image of point light sources taken with a clean protective window.......................................... 5–14
Figure 29 Image of point light sources taken with a dirty (finger print) protective window ................... 5–14
Figure 30 Enlargement of a hot pixel............................................................................................................... 5–15
Figure 31 Light from the flash has reflected on particles in front of the camera ....................................... 5–15
RM-824; RM-825; RM-826
Camera Module Troubleshooting
Issue 2 NOKIA INTERNAL USE ONLY Page 5 – 3
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