The part of the lens to be inspected should first be inspected for its entire structure. The lens should first be visually inspected for damage and dirt, and then the screws at the lens should be further checked for looseness and the levers and springs are good.
The lens portion of a digital camera is usually driven by an electromagnet. When working, the electromagnet will drive the lever to push the lens. If the electromagnet malfunctions, or if the electromagnet's driving lever is not good, it will cause the lens to malfunction, making the captured image unclear. The electromagnet is welded to the solder joints with two leads. During the test, the two solder joints can be tested with a multimeter.
When operating, place the test leads of the multimeter on the solder joint of the electromagnet. At this time, there should be an impedance of 10 to 20 ohms. If it is detected that the line of the electromagnet is not connected, it indicates that there is a disconnection; if the detected impedance is too small or equal to 0, it indicates that there is a short circuit.
In addition, the lens section also has a control lever that pushes and pulls the lens. If the control lever is released, broken or incorrectly positioned, it should be replaced or overhauled in a timely manner. Because of the special nature of this type of component, bonding methods are generally used to repair fractures.