Analysis: If there is no WiFi, first measure the voltage at C5202_RF; it should be 3.8V. If not, connect a wire from another point to C5202_RF, then measure C5204_RF for 1.8V. If that is also absent, short R5208_RF, check and replace L5201_RF, and replace the WiFi module at C5202_RF! If the WiFi signal is weak, … Read more
After soldering a circuit board, when checking whether the circuit board can work properly, it is usually not advisable to power the board directly. Instead, follow the steps below to ensure that there are no issues at each step before powering it on. Check Wiring Accuracy Checking the schematic is crucial. The first focus of … Read more
Hello everyone, I am your hardware engineer friend. Today, we are going to discuss a problem that has troubled countless engineers: How do we find the breakpoints on circuit boards filled with numerous interfaces? You must have seen them: driver motherboards, IO modules… with interfaces as numerous as spider legs, and traces as dense as … Read more
Correctly using a multimeter not only allows for quick identification of faults but also prevents damage to electrical devices and the multimeter itself. Below are some tips for using a multimeter.Before measuring, check the range; do not measure without checking the range. After measuring, switch to the empty range. The dial should be level, and … Read more
1. Fault Characteristics and Repair of Circuit Board Capacitor Damage Failures caused by capacitor damage are the most common in electronic devices, particularly with electrolytic capacitors. Capacitor damage manifests as: Reduced capacitance; Complete loss of capacitance; Leakage; Short circuit. The role of capacitors in circuits varies, leading to different failure characteristics. In industrial control circuit … Read more
Introduction In the production operations of a factory, the PLC module acts like the “central brain” of the equipment. Once it suddenly “breaks down,” the entire production line may come to a halt, resulting in significant losses. When a PLC module has issues, we often suspect it is faulty at first. However, it may be … Read more
How can I operate on my mobile device to access the router login page at http://192.168.10.1? How can I resolve the issue of logging into the customized router version from China Mobile at http://192.168.10.1? Answer: The complete and correct format for the login IP address commonly used for the China Mobile customized router should be … Read more
1 Do not ask for code right away! You should think about why. When you come up with a solution on your own and then refer to others’ suggestions, you will understand the differences in thought processes. 2 Beginners should not read too many books, as it can lead to confusion. First, find a good … Read more
(Note: This article only provides a process description for certain users’ consumption features and does not serve as promotional guidance.)(Disclaimer: The content of this article is time-sensitive; please refer to the latest official guidelines for specific operations.) In the era of social media, Douyin commands have become an important way to share exciting videos. However, … Read more
(Note: This article only provides a process description for certain user-visible consumption features and does not serve as promotional guidance.)(Disclaimer: The content of this article is time-sensitive; please refer to the latest official guidelines for specific operations.) In the era of short videos, Douyin commands have become an important way to share exciting content. However, … Read more