In this post, we learn about Basic knowledge of Mobile Repair.
Basic knowledge is an important part of any type of work, here we know about mobile repair basics.
Earlier, I briefly talked about the external disassembly and assembly of mobile phone maintenance, so friends who pay attention to mobile phone maintenance know.
External distribution in mobile phone repair basically can not be called technology.
So how to learn the technology of mobile phone motherboard repair, first of all, we start by understanding electronic components.
And these basic components will appear in almost all electronic devices, not only mobile phones but even all electronic equipment maintenance will involve electronic components, it can be said that electronic maintenance is a necessary skill. Therefore,
if you want to learn mobile phone repair well, you must start by understanding these components, and then you can understand the meaning of the component symbols in the schematic diagram of the mobile phone circuit, to lay a good foundation for future learning.
If you want to learn this part, you need to prepare a digital multimeter and several scrapped smartphone motherboards in advance to facilitate practical understanding and measurement experiments.
The basic elements of a mobile phone
Now the mobile phone is composed of the motherboard, display, battery, shell, etc., we have talked about the external configuration earlier, and now we mainly introduce the basic electronic components of the mobile phone motherboard,
The basic electronic components include resistance, capacitance, inductance. These three components are brothers and three, which can be seen in almost most of the circuits of mobile phones mastering basic electrical components such as resistors, capacitors, and inductors, you can know 80% of the components on the motherboard of smartphones.
So we talk about resistance: resistors are generally called resistors in daily maintenance, and the resistors used on the motherboard of mobile phones are mainly chip resistors.
We often say that SMD Resistor is a chip ffixed chipchchip chip-fixed as rectangular chip resistor = rectangular Chip Fixed Resistor), invented by ROHM (ROHM) and first introduced to the market. Resistors are currently the most used electronic component in smartphones.
Resistor shape characteristics and circuit symbols
2. SMD resistor
There is a clear difference between chip resistors and in-line resistors in mobile phones because in-line resistors are not used in mobile phones, so we mainly introduce the shape characteristics of chip resistors.
The form factor of the resistor
1. Resistance is one of the most widely used components in mobile phone repair, and there are CUNZ with resistance in almost all mobile phones
SMD resistor is a kind of metal glass uranium resistor, which is a resistor made by mixing metal powder and glass uranium powder and printing on the substrate by screen printing.
The error accuracy of chip resistor resistance is ±1%, ±2%, ±5%, and ±10% accuracy, and the most conventional ones are ±1% and ±5%.
It has the characteristics of moisture resistance, high temperature, and a small temperature coefficient.
3. SMD exclusion
In mobile phones, there is also a form of resistance combination called exclusion, which is the combination of two or more resistors of the same resistance value to meet the resistance
Exclusion is mainly used in the interface circuit of digital circuits.
The shape of the resistor is here, how to have some electronic products on hand of the waste motherboard can be observed to see what these resistors look like.
