Nokia RM-484 - 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 .............................................................................................................. 5–10
Testing camera image sharpness................................................................................................................. 5–11
Effects of dirty or defective camera lens protection window.................................................................... 5–12
Faulty pixels in images .................................................................................................................................. 5–13
Flash photography problems........................................................................................................................ 5–14
Main (back) camera troubleshooting flowcharts............................................................................................. 5–15
Image or video capture troubleshooting .................................................................................................... 5–15
IVE basic checks .............................................................................................................................................. 5–16
No recognizable viewfinder image .............................................................................................................. 5–17
Bad image quality troubleshooting ............................................................................................................. 5–17
Flash troubleshooting.................................................................................................................................... 5–19
Accelerometer troubleshooting......................................................................................................................... 5–20
List of Figures
Figure 36 Only center part of image is in focus due to limited depth of focus ...............................................5–6
Figure 37 Blurring caused by shaking hands ......................................................................................................5–7
Figure 38 Noisy image taken in +70 degrees Celsius .........................................................................................5–7
Figure 39 Image taken against light....................................................................................................................5–8
Figure 40 Flicker in an image; object illuminated by strong fluorescent light................................................5–8
Figure 41 A lens reflection effect caused by sunshine........................................................................................5–9
Figure 42 Good image taken indoors...................................................................................................................5–9
Figure 43 Good image taken outdoors ................................................................................................................5–9
Figure 44 Effects of dust on optical path .......................................................................................................... 5–10
Figure 45 Image taken with clear protection window ................................................................................... 5–12
Figure 46 Image taken with greasy protection window ................................................................................ 5–12
Figure 47 Image of point light sources taken with a clean protective window........................................... 5–13
Figure 48 Image of point light sources taken with a dirty (finger print) protective window .................... 5–13
Figure 49 Enlargement of a hot pixel................................................................................................................ 5–14
Figure 50 Light from the flash has reflected on particles in front of the camera ........................................ 5–14
RM-484; RM-485; RM-486
Camera Module Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 5 –3
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