Table of Contents
Introduction to camera module troubleshooting...............................................................................................8–5
The effect of image taking conditions on image quality...................................................................................8–6
Image quality analysis ........................................................................................................................................8–10
Testing for dust in camera module...............................................................................................................8–10
Testing camera image sharpness..................................................................................................................8–11
Dirty camera lens protection window..........................................................................................................8–12
Image bit errors..............................................................................................................................................8–12
Camera troubleshooting flowcharts...................................................................................................................8–14
Main camera troubleshooting flowchart......................................................................................................8–14
Back camera troubleshooting........................................................................................................................8–15
Camera hardware failure message troubleshooting..............................................................................8–15
Camera baseband HW troubleshooting...................................................................................................8–16
Camera viewfinder troubleshooting........................................................................................................8–17
Bad camera image quality troubleshooting...........................................................................................8–18
Front camera troubleshooting.......................................................................................................................8–19
Front camera hardware failure message troubleshooting....................................................................8–19
Front camera HW baseband troubleshooting.........................................................................................8–20
Front camera viewfinder troubleshooting..............................................................................................8–22
Front camera bad image quality troubleshooting.................................................................................8–23
Flash LED troubleshooting...................................................................................................................................8–24
Introduction to flash LED troubleshooting...................................................................................................8–24
Flash LED and image taking conditions........................................................................................................8–24
Flash LED construction....................................................................................................................................8–28
Analysing image quality.................................................................................................................................8–29
Possible faults in image quality................................................................................................................8–29
Testing flash module functionality..........................................................................................................8–29
Testing image colours with flash.............................................................................................................8–30
Testing flash power...................................................................................................................................8–30
Flash LED troubleshooting flowcharts..........................................................................................................8–31
Bad image quality when using flash LED.................................................................................................8–31
Flash LED indicator mode troubleshooting.............................................................................................8–31
Flash LED HW baseband troubleshooting................................................................................................8–31
List of Figures
Figure 67 Blurred image. Target too close..........................................................................................................8–6
Figure 68 Blurring caused by shaking hands.......................................................................................................8–7
Figure 69 Near objects get skewed when taking images from a moving vehicle...........................................8–7
Figure 70 Noisy image taken in +70 degrees Celsius.........................................................................................8–8
Figure 71 Image taken against light; the actual object is dark.........................................................................8–8
Figure 72 Flicker in an image; uniform object illuminated by strong fluorescent light.................................8–9
Figure 73 A lens reflection effect caused by sunshine........................................................................................8–9
Figure 74 Good image taken indoors.................................................................................................................8–10
Figure 75 Good image taken outdoors..............................................................................................................8–10
Figure 76 Effects of dust on optical path...........................................................................................................8–11
Figure 77 Image taken with clean protection window....................................................................................8–12
Figure 78 Image taken with greasy protection window.................................................................................8–12
Figure 79 Bit errors caused by JPEG compression.............................................................................................8–13
Figure 80 Example of a good quality image taken with the flash LED...........................................................8–24
Figure 81 overexposed image.............................................................................................................................8–25
RM-91; RM-92
Camera Module Troubleshooting Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 8 –3
Copyright © 2006 Nokia. All rights reserved.
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