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

Camera hardware failure message troubleshooting...................................................................................8-14

Camera baseband HW troubleshooting........................................................................................................8-15

Camera viewfinder troubleshooting.............................................................................................................8-16

Bad camera image quality troubleshooting.................................................................................................8-17

Flash LED troubleshooting...................................................................................................................................8-18

Introduction to flash LED troubleshooting...................................................................................................8-18

Flash LED and image taking conditions........................................................................................................8-18

Flash LED construction....................................................................................................................................8-22

Analysing image quality.................................................................................................................................8-23

Possible faults in image quality................................................................................................................8-23

Testing flash module functionality..........................................................................................................8-23

Testing image colours with flash.............................................................................................................8-24

Testing flash power...................................................................................................................................8-24

Flash LED troubleshooting flowcharts..........................................................................................................8-25

Bad image quality when using flash LED.................................................................................................8-25

Flash LED indicator mode troubleshooting.............................................................................................8-25

Flash LED HW baseband troubleshooting................................................................................................8-26

List of Figures

Figure 66 Blurred image. Target too close..........................................................................................................8-6

Figure 67 Blurring caused by shaking hands.......................................................................................................8-7

Figure 68 Near objects get skewed when taking images from a moving vehicle...........................................8-7

Figure 69 Noisy image taken in +70 degrees Celsius.........................................................................................8-8

Figure 70 Image taken against light....................................................................................................................8-8

Figure 71 Flicker in an image; object illuminated by strong fluorescent light................................................8-9

Figure 72 A lens reflection effect caused by sunshine........................................................................................8-9

Figure 73 Good image taken indoors.................................................................................................................8-10

Figure 74 Good image taken outdoors..............................................................................................................8-10

Figure 75 Effects of dust on optical path...........................................................................................................8-11

Figure 76 Image taken with clean protection window....................................................................................8-12

Figure 77 Image taken with greasy protection window.................................................................................8-12

Figure 78 Bit errors caused by JPEG compression.............................................................................................8-13

Figure 79 Example of a good quality image taken with the flash LED...........................................................8-18

Figure 80 overexposed image.............................................................................................................................8-19

Figure 81 Dark and noisy image.........................................................................................................................8-20

Figure 82 Shaken image......................................................................................................................................8-21

Figure 83 Camera white balance failure and overexposure............................................................................8-22

Figure 84 Color difference between flash colour limit samples......................................................................8-22

Figure 85 Mechanical construction of the flash LED module...........................................................................8-23

Issue 1

Table of Contents

COMPANY CONFIDENTIAL

Nokia Customer Care

Page 8 -3

Table of Contents