For many friends outside the industry, the mobile phone will be considered wrong if the point is bad, then abandoned, in fact, is the general problem may appear in the phone cable is connected to the motherboard to connect the phone line phone display, camera, key board and motherboard cable is cable. Display to see things that are controlled by the motherboard output, while the cable's role here. It is responsible for the data transmission between the phone and displays the motherboard.
Phone cable fault performance, cable damage, nothing is broken, and both produce resistance, the former tend to be more intuitive, with the naked eye you can find, change, or fly line can be solved; If you are after a kinds of trouble on relatively little need to measure it to know. But parallel display circuit, if the small screen with a display case, display problems big screen will not be very complicated, because parallel lines, big screen and small screen are shared, if that screen has revealed that not, generally enable signal for each screen there is a problem, or the problem is the interface cable (which is in the Hall circuit is a good premise).
For the video, is not displayed, no lights, no earpiece sound, no ringing, no boot, key failure, etc., we can say that it is the problem phone cable failure.
Finally, and share test methods and conditions of phone cable, and the electrical measuring OK the product into the customer's mobile phone cases offer or real machine, and then fixed on the test machine together, according to customer specifications set a good flip angle and frequency, start testing machine to start the test. After at least 10,000 times per clamshell product once removed electrical measurement to verify break (when the customer has to provide real machine can boot test). To flip times last test failed when the product is not as life of the product.
AWM 20624 80C 60V VW-1 Multi-Layer flexible printed circuit Gold plated FFC cable
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