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

Issue 1

Table of Contents

COMPANY CONFIDENTIAL

Nokia Customer Care

Page 8 -3

Table of Contents