Second, Shuaiguo phone handling skills

   Shuaiguo phone prone to the following failures:

One antenna easily broken, just replace the corresponding antenna maintenance.

The second is easy to damage the housing , replacement housing can be. Also Shuaiguo phone casing easily deformed , Demolition should be careful , can not be forced to pry hard to avoid failure to expand .

Third, 13M ( some phones with 26M) easily damaged, broken or vibration can cause the oscillation frequency can not afford not allowed to produce power or no signal failure.

Fourth, the filter is easy to break , resulting in no net, no emission , weak signal failure.

Five is the phone thanks to surface mount technology , the IC fall easily open welding caused various failures , maintenance should be carried out purposefully welding according to symptoms. Such as Ericsson mobile phone after Shuaiguo easily cause sound receiver and transmitter are small faults , after patching multimode IC failure can be largely excluded.

 

Third, the circuit board copper foil off processing techniques

    In the mobile phone repair process, the board will often encounter foil off phenomenon , the reason , one often encountered when maintenance personnel change blowing components or integrated circuits, due to improper or unskilled taken off the foil ; Second, some fell into the water after etching the phone , in the ultrasonic cleaning device for cleaning the parts of the circuit board copper wash. If this phenomenon, many repairers do anything , the phone often sentenced to "crash ." So effectively makes copper connections to recover it? Here are some common remedies.

1 Find information control

    Check the relevant maintenance data , to see where the foil off the pin and the pin element which is connected to the find , with a wire attached to the legs . Due to the current rapid development of new models , maintenance data lag , and many more mobile phone repairs data errors , there are some differences in comparison with the physical also, so this method is somewhat limited in practical applications .

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