User Guide

Table Of Contents

Figure 102 Effects of dust on optical path

If large dust particles get trapped on top of the lens surface in the cavity between camera window and lens,

they will cause image blurring and poor contrast. The dust gasket between the window and lens should

prevent any particles from getting into the cavity after the manufacturing phase. Dust in this position should

be blown away by using compressed air.

Unauthorized disassembling of the product can also be the root of the problem. However, in most cases it

should be possible to remove the particle(s) by using clean compressed air. Never wipe the lens surface before

trying compressed air; the possibility of damaging the lens is substantial. Always check the image sharpness

after removing dust.

Testing camera image sharpness

Symptoms and diagnosis

If pictures taken with a device are claimed to be blurry, there are six possible sources for the problem:

1 The protection window is fingerprinted, soiled, dirty, visibly scratched or broken.

2 The photographed object is too close – the camera lens operates with distances from 20 cm to infinity.

This is no cause to replace camera module.

3 User has tried to take pictures in too dark conditions, and images are blurred due to handshake or

movement. This is no cause to replace camera module.

4 There is dirt between the protection window and camera lens.

RM-362; RM-363

Camera Module Troubleshooting

Page 5 –14 COMPANY CONFIDENTIAL Issue 1