User Guide

Table of Contents
Introduction to camera module troubleshooting................................................................................................................1–5
The effect of image taking conditions on image quality...................................................................................................1–6
Image quality analysis ...............................................................................................................................................................1–10
Testing for dust in camera module...................................................................................................................................1–10
Testing camera image sharpness......................................................................................................................................1–11
Dirty camera lens protection window.............................................................................................................................1–12
Image bit errors......................................................................................................................................................................1–13
Camera troubleshooting flowcharts.......................................................................................................................................1–13
Back camera troubleshooting.............................................................................................................................................1–13
Camera hardware failure message troubleshooting............................................................................................1–13
Camera baseband HW troubleshooting.....................................................................................................................1–15
Camera viewfinder troubleshooting...........................................................................................................................1–16
Bad camera image quality troubleshooting............................................................................................................1–17
RM-84 front camera troubleshooting...............................................................................................................................1–18
Front camera hardware failure message troubleshooting.................................................................................1–18
Front camera HW baseband troubleshooting.........................................................................................................1–19
Front camera viewfinder troubleshooting...............................................................................................................1–21
Front camera bad image quality troubleshooting.................................................................................................1–22
Flash LED troubleshooting.........................................................................................................................................................1–23
Introduction to flash LED troubleshooting.....................................................................................................................1–23
Flash LED and image taking conditions...........................................................................................................................1–23
Flash LED construction...........................................................................................................................................................1–27
Analysing image quality.......................................................................................................................................................1–28
Possible faults in image quality...................................................................................................................................1–28
Testing flash module functionality.............................................................................................................................1–28
Testing image colours with flash................................................................................................................................1–29
Testing flash power..........................................................................................................................................................1–29
Flash LED troubleshooting flowcharts..............................................................................................................................1–30
Bad image quality when using flash LED..................................................................................................................1–30
Flash LED indicator mode troubleshooting..............................................................................................................1–30
Flash LED HW baseband troubleshooting.................................................................................................................1–31
List of Figures
Figure 1 Blurred image. Target too close................................................................................................................................1–6
Figure 2 Blurring caused by shaking hands............................................................................................................................1–7
Figure 3 Near objects get skewed when taking images from a moving vehicle........................................................1–7
Figure 4 Noisy image taken in +70 degrees Celsius.............................................................................................................1–8
Figure 5 Image taken against light...........................................................................................................................................1–8
Figure 6 Flicker in an image; object illuminated by strong fluorescent light..............................................................1–9
Figure 7 A lens reflection effect caused by sunshine...........................................................................................................1–9
Figure 8 Good image taken indoors.......................................................................................................................................1–10
Figure 9 Good image taken outdoors....................................................................................................................................1–10
Figure 10 Effects of dust on optical path..............................................................................................................................1–11
Figure 11 Image taken with clean protection window....................................................................................................1–13
Figure 12 Image taken with greasy protection window.................................................................................................1–13
Figure 13 Bit errors caused by JPEG compression..............................................................................................................1–13
Figure 14 Example of a good quality image taken with the flash LED........................................................................1–23
Figure 15 overexposed image..................................................................................................................................................1–24
Figure 16 Dark and noisy image..............................................................................................................................................1–25
RM-84/99
Camera Module Troubleshooting Nokia Customer Care
Issue 1 Company Confidential Page 1–3
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