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无信号是手机维修中比较常见的故障之一。该故障不仅涉及的元件多,而且范围广,既有软件问题又有硬件损坏,因此许多手机维修初学者遇到该故障时,一旦采用清洗加焊、更换大元件的方法无效,就会陷入困境。怎样才能快速找出故障部位修复手机呢? 一名熟练的手机专业维修人员必须具备以下条件:首先要有维修手机最基本的软件(例如免拆机维修仪或48编程器)、硬件(例如示波器、频率计等),并且能熟练使用上述软硬件;其次能理解手机原理电路图,了解元件作用和在机板的位置,同时具有良好的焊接技术。
No signal is one of the more common faults in cellphone repair. The failure involves not only many components, but also a wide range of both software problems and hardware damage, so many mobile phone repair beginners encounter the failure, once the cleaning and welding, replacement of large components of the method is invalid, it will be in trouble . How to quickly locate the fault repair phone? A skilled cell phone repair professionals must have the following conditions: First of all have to repair the phone’s most basic software (such as maintenance-free repair instrument or 48 programmer), hardware (such as oscilloscope , Frequency meter, etc.), and can skillfully use the above hardware and software; secondly, to understand the circuit diagram of the phone to understand the role of components and the location of the board, at the same time have a good welding technology.