Nokia RM-57 Service Manual page 319

RM-57/58
Camera Module Troubleshooting Nokia Customer Care
Distance to the target (too close)
There is no feedback in the flash system, which means that the light output is constant in every situation. This
causes the images to overexposure, when shot from close distance. The flash LED is designed to work optimally
way between distances of 50cm – 1.20m.
This is normal behaviour; do not change the flash module.
Figure 86 overexposed image
Distance to the target (too far away):
The power of white LED flash is still very modest compared to xenon flash technology. Even with the full power,
the maximum distance for the acceptable image quality is roughly 1.2m. If the distance is greater than 1.2m,
the images will appear dark and the noise level increases.
This is normal behaviour; do not change the flash module.
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