Nokia RM-609, Service Manual

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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 ................................................................... 5–11
Faulty pixels in images ................................................................................................................................. 5–13
Flash photography problems ....................................................................................................................... 5–14
Main (back) camera troubleshooting flowcharts ............................................................................................ 5–15
No recognizable viewfinder image ............................................................................................................. 5–15
Bad image quality troubleshooting ............................................................................................................ 5–16
Main camera troubleshooting ...................................................................................................................... 5–17
Secondary camera troubleshooting ................................................................................................................. 5–18
Flash troubleshooting ........................................................................................................................................ 5–20
List of Figures
Figure 25 Blurring caused by shaking hands ..................................................................................................... 5–6
Figure 26 Near objects get skewed when taking images from a moving vehicle .......................................... 5–7
Figure 27 Noisy image taken in +70 degrees Celsius ........................................................................................ 5–7
Figure 28 Image taken against light ................................................................................................................... 5–8
Figure 29 Flicker in an image; object illuminated by strong fluorescent light ............................................... 5–8
Figure 30 A lens reflection effect caused by sunshine ....................................................................................... 5–9
Figure 31 Good image taken indoors .................................................................................................................. 5–9
Figure 32 Good image taken outdoors ............................................................................................................... 5–9
Figure 33 Effects of dust on optical path ......................................................................................................... 5–10
Figure 34 Image taken with clear protection window .................................................................................. 5–12
Figure 35 Image taken with greasy protection window ............................................................................... 5–12
Figure 36 Image of point light sources taken with a clean protective window .......................................... 5–13
Figure 37 Image of point light sources taken with a dirty (finger print) protective window ................... 5–13
Figure 38 Enlargement of a hot pixel ............................................................................................................... 5–14
Figure 39 Light from the flash has reflected on particles in front of the camera ....................................... 5–14
RM-609
Camera Module Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 5 – 3
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