手机电流(国外英文资料).docVIP

手机电流 If a maintenance doctor is a doctor, then maintaining a stable power supply is like a doctors stethoscope, and the change in the phones current is like the pulse of a phone. Any experienced cell phone maintenance master, for any fault cell phone, first does the analysis of its current response. The current state is the first and most important step in judging a phones failure. So, for beginners, it may be the beginning of your phone repair and an important skill you need to maintain your mobile career for the rest of your life! For all mobile phone WeiXiuZhe, with notes of maintenance, take note of each phone, normal and abnormal current is very important, this is a valuable and indispensable precious maintenance experience! The current is not a mystery, and everyone will look at the current. But what why current fault, how will appear this kind of failure to repair, this would require the authoritative data effectively, need maintenance personnel of a lot of valuable experience! If these valuable data and maintenance experiences are available, the speed of the repair machine will be greatly improved! Here is a bit of experience: When the power IC is installed, the current is 13mA, which indicates that the current of the power IC is 13mA, and if the current is less than 13mA, the power IC is bad. With a 13M crystal, the current is also 13mA, and the CPU is working normally. Reload the CPU, the current is 45mA, if the current is 45mA, the power supply, 13M, the CPU is basically normal work. The current, which is 45mA, is not yet installed, which means that 45mA is the current that is not working for the word library, which may be bad software or bad font. So the phones fault is as follows: 1, when the key has no current response: First, check the line. Step two: check the B + input line; Step three, check the power IC. When there is a leakage of electricity, it is mainly found in the components that are connected to B + (power and power). Press the power curren