Is the chip miner's easily damaged part the control board

1.

bitcoin mining machine is a kind of computer used to earn bitcoin. This kind of computer generally has professional mining chips and works in the way of burning graphics card, which consumes a lot of power. It is one of the ways to get bitcoin that users download software from personal computer and then run specific algorithm to get corresponding bitcoin after communicating with remote server

mining is actually a competition of performance and equipment, and a competition of computing power among miners. Miners with more computing power are more likely to dig bitcoin. With the increase of computing power in the whole network, it is more and more difficult to dig bits with traditional devices (CPU, GPU). People have developed chips specially used for mining. Chip is the core part of mining machine. The process of chip operation will proce a lot of heat, in order to cool down, bitcoin miner is generally equipped with heat sink and fan

< H2 > extended materials:

bitcoin is a kind of virtual currency. Bitcoin mining system is the process of carrying out mathematical operation for bitcoin network through computer hardware. Miners who provide services can get a reward, because the network reward is calculated according to the tasks completed by miners, so the competition for mining is very fierce

bitcoin mining started with low-cost hardware such as CPU or GPU, but with the popularity of bitcoin, the mining process has changed greatly. Nowadays, the mining activities are transferred to the field programmable gate array, and the hash speed can be achieved through optimization. The mining efficiency of this mode is very high

2. The temperature is too high: one of the double fans is not running, or the speed cannot reach.

3. The chip is the easiest to be damaged, because the working voltage range of the chip is usually narrow, many of them work at 5V, the maximum allowable voltage is 6V, and others work at 3V, the maximum allowable voltage is lower than 5V. For example, digital / analog chip, analog switch, 74LS logic gate chip, 80C31, EPROM and EEPROM generally work at 5V, and they are easy to be damaged when they exceed 6V, Darlington tubes have higher withstand voltage and are not easy to be damaged. Electrolytic capacitors are easy to be damaged. Ceramic capacitors usually have higher withstand voltage and no polarity problem.,

4. It must have been before 2006. I saw the CCTV news at noon and said bitcoin and other virtual currencies. Because our house was built in 2006

5.

To remove the chip with many feet on all sides, special tools must be used instead of ordinary electric soldering iron

the special tool for soldering multi pin chips is the air soldering gun, and its shape is shown in the figure

this kind of tool can be found in all mobile phone repair shops. It is a non-contact welding tool. In fact, it is a miniature hair dryer surrounded by electric heating wires. The air blown from the air gun is heated by electric heating wires and then blown to the chip. All the feet of the chip are uniformly heated to the temperature of solder melting, and the chip is separated from the circuit board

chips are not afraid of high temperature without power on (some chips can be heated to more than 200 degrees without damage without power on, while the melting point of high-quality solder is more than 170 degrees) ° Left and right). Here is a webpage where you can read the introction of the hot air gun carefully. In addition, you can also go to the shop where the mobile phone is repaired to observe how the masters "blow" the chips on the main board of the mobile phone with this tool:

http://item.taobao.com/auction/item_ detail-0db1-.htm?cm_ cat=0

6. If it's a fixed number of letters, the key is usually stuck or short circuited, and few control chips are broken

7.

1. Chip power supply voltage

most people think that the chip power supply on their system board is LD output, which is very stable. They think that they can't burn the chip. The chip burning program is generally divided into two ways: on board burning and on-board burning. The on-board burning system board generally has its own MCU power supply voltage range, The VCC of debugging interface is usually pulled out directly from the chip power supply pin,

if the power supply of programmer is unstable, beyond this range, it is easy to cause the chip overvoltage damage. Generally, the chip is directly powered by the programmer. If the power supply of programmer is unstable, the yield of burning chip will be greatly reced, resulting in the damage of power management chip

Generally, there are many ways to kill the chip, and the chip will include ESD protection. If a voltage of. 5V is applied to the outside of the chip, an electric field of 0.5mv/m will be generated on the 1nm medium, which is enough to cause high voltage arc. For a single die in a package, their target is 2kJ

if you try to minimize ESD, or even eliminate it on these wide1 / O interfaces or multi chip interface channels of any type, it means that if you can't really test each chip according to the same standards you have for a single chip. They have to go through more professional testing, because their ESD protection is very small, or they may not have ESD protection, causing damage to the power management chip

3. The influence of magnetic field on chip semiconctors

with the multi-function of smart phones and tablet computers, the required power supply voltage also involves a variety of specifications, so the number of inctors used in power supply circuits is increasing. Electromagnetic sensitivity (EMS) is a problem that people have to worry about. Electromagnetic interference (EMI) is the noise emitted by the chip to the environment. The noise source comes from the active circuit,

it will generate current on the power / ground wire and signal line, and the ground wire of the power line will be packaged to the PCB. If it sees the antenna structure on the package or PCB, it will cause air radiation, and then radiate to the environment through the antenna structure to proce interference. The energy injection test is to inject 1W energy from 150kh2 to 1GHz. At each frequency, you inject 1 W of energy into the system

if you don't have enough protection, you will destroy the circuit that enters the chip along the path, or the voltage on the pin may be too high. If the voltage is too high, it will proce over power strain, and the power management chip will be damaged

In many cases, poor thermal design will not lead to instant catastrophic failure, or even lead to mediocrity of procts, but the life of devices will become shorter. Power companies make investment in many aspects, and more and more semiconctor manufacturers use embedded power to rece the cost of procts, which also makes the power more and more high,

the higher the power, the higher the temperature of electronic components. The problem of chip heating is not only that the mobile phone gets hot in the pocket. It causes the transistors and the connections between them to deteriorate. This may be the power management chip

extended data:

8 kinds of common power management IC chip classification

1, AC / DC molation IC. It contains low voltage control circuit and high voltage switching transistor

DC / DC molation IC. It includes a step-up / step-down regulator and a charge pump

Power factor control PFC pre molation IC. The power input circuit with power factor correction function is provided

Pulse molation or pulse amplitude molation PWM / PFM control IC. It is a pulse frequency molation and / or pulse width molation controller for driving external switches

5, linear molation IC (such as LDO). Including positive and negative regulators, as well as low dropout LDO molator

6. Battery charging and management IC. Including battery charging, protection and power display IC, as well as "intelligent" battery IC for battery data communication

7. The hot plug-in board controls the IC (eliminating the influence of inserting or removing another interface from the working system)

8, MOSFET or IGBT switch function IC

8. It's not expensive to replace your board. It's only over 100 yuan to buy a second-hand one...
don't repair it. It's not stable to repair it

9. Hello, you don't need to have US dollars in your bank card. The currency you pay out will be automatically converted into US dollars from the PayPal account of the other party, and there will be a conversion of exchange rate. You don't need to worry about professional guidance for PayPal registration, use, limit relief and other foreign trade one-stop services. If you need help, you can directly dect me