The technology of interdiction code has been adopted for phone

This failure There are two main, first, because of poor contact between the battery and battery contacts cause; two power IC output voltage is unstable, the power supply circuit of Weld or poor contact, resulting in cell phone protection. Button to shut down the phone as long as no key, it will not shut down a press some key phone automatically shut down, mainly due to the integrated circuits or components Weld of the buttons below. Plus battery leakage, first removing the power IC, if leakage, indicating caused by the power IC, such as leakage remains, indicating that the fault short circuit caused by damage to the battery cathode direct supply components or power lines.
This is the option to downgrade Brush, brushing boot white screen or set the machine if the downgrade did not choose this. FACTORY the SET: If you choose, brushing the opportunity to enter the test mode the phone restore factory settings, the password is set to change all the original, also known as unlocking. The SERVICE SETTINGS: This service option, there are many choices, write to the PM Reading PM clashes so. All right or not to move these service options on only a few if you want to select a service option right of the point after the tick SERVICE FACTORY SETTINGS: This is to restore the factory settings the USER the CODE the EDIT is recommended. The advertisement player phone exhibits some commercial on it with The advertisement player phone hidden in it.
This is to read the security code the CRT 308 and the CRT the BKP: the two backup options in a serial number, the recommendations boot the machine must be ticked Brush saved, or some machine brushing network lock, write the string The document can be unlocked. The machine does not boot, two hook removed, because the tick also less than a backup, but also prompt an error and ask you to continue anyway? The DEAD USB: This option is the USB data cable mode only option, the machine does not boot, need to tick, or the instrument can not recognize the phone. The NORMAL MODE: This is the standard mode, the USB data cable mode only need to tick the need to tick in the boot of the machine. The technology of interdiction code has been adopted for phone .
In fact, the JAF there are many features, just not learn too in depth, because some have chosen might be harmful to the machine, for example to write serial number like I do not try! Here only the BB5, for DCT4 models are similar. As a mobile maintenance staff, in addition to strong practical ability but also on the cell phone theory have a certain understanding. Secondly, the knowledge map is a very important part. But more English terms in the mobile phone circuit diagram, if we are not familiar with these English terms, it is difficult to find fault according to circuit diagram, speculated that analysis of a clue, the relationship between the pins of the basic components of the mobile phone is not clear.