(3) Prepare a component of many small drawers rack , you can put the appropriate accessories, parts and disassemble process , prepare a work lamp, a magnifying glass or microscope , electric iron , multimeter, voltage source and oscilloscope ;

4 Note that the ground all the instruments are connected together to prevent electrostatic damage to the phone's CMOS circuit ;

5 each machine before the demolition , the next two are touching the ground , let go of the static electricity on the human body , the dress should be careful not to wear synthetic clothing and so easy to produce static electricity maintenance ;

6 iron to burn for a long time not empty , so will aggravate oxidative tip , difficult to use a soldering iron . When using soldering iron under the IC should be used to weld iron warmth , after that hot, unplug the iron before welding.

Third, the maintenance Precautions

Former mobile phone repair , should note the following:

1 phone is integrated microelectronic products, integrated circuits are precision through advanced technology development and the development, maintenance personnel must understand each chip , performance components , to understand the logical connections of the circuit, circuit analysis , careful examination , correct judgment , fast and accurate operation , to avoid false positives , causing human failures, resulting in economic losses. Repaired before the user is asked whether , if repaired , to ask what the user has previously serviceable failure to judge whether the same fault occurs again , in order to identify the scope and causes of failure .

2 . Careful observation cell phone shell, to see if there is breakage, scratches, ' water marks, and ask why these traces generated by the user , thereby ascertain whether the phone is dropped, the phone has been dropped off easily lead components , fracture , Weld and other phenomena, water phone will appear different symptoms, alcohol or carbon tetrachloride required cleaning . Severe water erosion damage integrated circuits or phone circuit boards .

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