Mobile phone circuit diagram and maintenance method

The mobile phone is a microelectronic product of an integrated circuit. The integrated circuit is precision and developed and developed through advanced technology. Maintenance personnel must understand the performance of each chip and component, understand the logical connection of the circuit, perform circuit analysis, and carefully Inspection, correct judgment, quick and accurate operation, avoiding misjudgment, causing human failure and causing economic losses. Ask the user whether it has been repaired before. If it has been repaired, ask the user what fault was repaired before. According to this, judge whether the same fault has occurred again, in order to find out the fault range and cause the problem, find the correct solution, as shown in the figure. For the mobile phone circuit diagram.