User Guide

Table of Contents
Introduction to camera module troubleshooting ..............................................................................................6–5
The effect of image taking conditions on image quality...................................................................................6–6
Camera construction........................................................................................................................................... 6–12
[[[ERROR: No title available for <master_section>]]] ............................................................................................6–
Main camera construction............................................................................................................................. 6–12
Front camera construction............................................................................................................................ 6–13
Image quality analysis ....................................................................................................................................... 6–13
Testing for dust in camera module .............................................................................................................. 6–13
Testing camera image sharpness................................................................................................................. 6–14
Dirty camera lens protection window ......................................................................................................... 6–15
Image bit errors ............................................................................................................................................. 6–16
Camera viewfinder troubleshooting ................................................................................................................. 6–17
Bad camera image quality troubleshooting..................................................................................................... 6–18
Main (back) camera troubleshooting................................................................................................................ 6–19
[[[ERROR: No title available for <master_section>]]] ............................................................................................6–
Camera baseband HW troubleshooting....................................................................................................... 6–20
Secondary (front) camera troubleshooting...................................................................................................... 6–21
[[[ERROR: No title available for <master_section>]]] ............................................................................................6–
Camera baseband HW troubleshooting....................................................................................................... 6–22
Flash LED troubleshooting.................................................................................................................................. 6–23
Introduction to flash LED troubleshooting.................................................................................................. 6–23
Flash LED and image taking conditions ....................................................................................................... 6–23
Flash LED construction................................................................................................................................... 6–28
Analysing image quality................................................................................................................................ 6–28
Possible faults in image quality............................................................................................................... 6–28
Testing flash module functionality ......................................................................................................... 6–28
Testing image colours with flash ............................................................................................................ 6–29
Testing flash power .................................................................................................................................. 6–29
Camera flash LED troubleshooting ............................................................................................................... 6–30
Indicator LED troubleshooting........................................................................................................................... 6–31
Indicator LED construction ............................................................................................................................ 6–31
Camera indicator LED troubleshooting ........................................................................................................ 6–32
List of Figures
Figure 65 Image blurred due to too close distance to target (5 cm)................................................................6–6
Figure 66 Sharpness of picture is worse in edges than in center .....................................................................6–7
Figure 67 Especially this type of images are affected much by lack of sharpness in edges / corners...........6–7
Figure 68 Geometrical distortion..........................................................................................................................6–8
Figure 69 Handshake has caused blurring of this image. Note geometrical barrel distortion in
background...................................................................................................................................................6–8
Figure 70 Near objects in image get skewed when shooting from a moving car ..........................................6–9
Figure 71 Noisy image taken in +70 degrees celsius..........................................................................................6–9
Figure 72 Image which has been taken "against light". The actual object is dark...................................... 6–10
Figure 73 Flicker in image of white, uniform object illuminated by strong fluorescent light.................... 6–10
Figure 74 A lens reflection effect caused by sun shining above the scene ................................................... 6–11
Figure 75 A good picture taken indoors ........................................................................................................... 6–11
Figure 76 A good picture taken outdoors......................................................................................................... 6–11
Figure 77 Camera module cross section and assembly principle................................................................... 6–12
Figure 78 Main camera module bottom view including serial numbering................................................... 6–12
RM-135
Camera Module Troubleshooting Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 6 –3
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