Interface troubleshooting
Camera failure
Introduction to camera troubleshooting
Bad conditions often cause bad pictures. Therefore, the camera operation has to be checked in constant
conditions or by using a second, known-to-be-good Nokia device as reference. Image quality is hard to
measure quantitatively, and the difference between a good and a bad picture can be small. Some training
or experience may be needed to detect what is actually wrong.
When checking for possible errors in camera functionality, knowing what error is suspected significantly
helps the testing by narrowing down the amount of test cases. The following types of image quality problems
are common:
• Dust (black spots)
• Lack of sharpness
• Bit errors
Taking and evaluating test pictures
When
taking
a test picture, remember the following:
• Avoid bright fluorescent light, 50/60Hz electrical network or high artificial illumination levels
• If the phone is hot, let it rest for a while before taking the picture
• Make sure the optical system is clean
• Use highest possible resolution
• Make sure the light is suffiecient (bright office lightning)
• Do not take the picture towards light source
• Be as still as possible when taking the picture
• Distance should be at least 40cm, 1-2m is recommended
When
evaluating
a test picture, remember the following:
• The center of the picture is sharper than the edges
• The image may be blurred, though it does not show in the viewfinder
• Analyse the picture from your PC monitor, full colour setting is recommended
• If possible, compare with a picture of the same motive taken with a similar Nokia device
RM-70
BB Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 6 –9
Copyright © 2005 Nokia. All rights reserved.
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