Testing Image Colours With Flash; Testing Flash Power - Nokia n81 Service Manual

RM-179; RM-223
Camera Module Troubleshooting
Results
If the LED flashes normally, the overall functionality of the module is OK.

Testing image colours with flash

Context
With the help of this test you can check if the image colours are normal when using the flash.
Steps
1. Take an image of a target, which contains something white in total blackness from less than 1 m range.
Results
If the white target appears to be white, the flash is working correctly. However, remember that there is some
variation in the flash colour from module to module.

Testing flash power

Context
With the help of this test you can check if the flash is working with adequate power level.
Steps
1. Take an image with the flash in total blackness (ambient light <1 lux) of a target 80 cm - 1 m away.
Results
If the flash is working normally with adequate power level, the image is correctly exposed between distances
80 cm to 1 m.
Remember that the brightness level in the corners is always less than in the center of the image because of
camera and flash optics.
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