RT809H Programmer Tutorial: EMMC Offline Writing Method Apply a bit of soldering flux on one side of the EMMC, use a hot air gun to heat evenly, and remove the EMMC chip. Let the removed EMMC chip cool aside, and observe the chip pins for any solder balls. If necessary, add solder or solder balls. … Read more
Today, I am repairing a backlogged board sent by a Taobao user, the Changhong ZLS47HIS-V1 motherboard, some small capacitors are missing. The main chip is MSD6A818, powered by 12V+24V, with a Nor Flash+EMMC combination. The symptom is that the power light is on but it won’t boot. Connecting to the programmer, the printed information is … Read more
Sometimes we encounter a situation where a previously functioning USB drive or SD card suddenly shows “access denied” or “cannot read” when plugged into the computer. Often, important files are stored on the USB drive, and formatting is not an option. What should you do? Today, “Computer Matters” will teach you a trick that can … Read more
I declare that I am not a repair master, just an ordinary user! First, let me wish all the masters a Happy New Year! Now, back to the point. I have a Xiaomi 3 with a 64GB memory whose screen is broken, and it seems a waste to throw it away. Since I often browse … Read more
Author: zhangtao2: Testing equipment is an indispensable part of our daily production and life. Once these devices malfunction, how should we inspect and diagnose them? Here are some summarized experiences to share with everyone. 1. Observation Method Utilize visual, olfactory, and tactile senses. Sometimes, damaged components may change color, bubble, or show signs of burning; … Read more
In the daily management of laboratories, the diagnosis and repair of instrument equipment is an important task. With the increasing variety of equipment, the characteristics of faults are also showing a trend of diversification. This article will systematically introduce the fault diagnosis process and repair methods for instrument equipment, providing practical references for laboratory management. … Read more
Taking Fanuc robots as an example! 1 Unable to power on Check and Repair Controller Components Check 1: The controller circuit breaker is on and has not tripped Repair: Reset the circuit breaker Check 2: Check if the LED indicator on the power supply board (PSU) is lit (GREEN). Repair: If the LED indicator is … Read more
: Common Water Pump Fault Analysis Unable to Start: One of the most common faults is the inability of the water pump to start, which may be due to power supply issues such as loose connections, poor switch contact, blown fuses, or missing phases in three-phase power supply. Mechanical faults in the pump itself, such … Read more
Failure phenomenon: A “San’an” brand low-speed electric vehicle experienced a malfunction when the driver mistakenly disconnected the air switch controlling the main power supply while going downhill, causing the brushless DC motor to generate back electromotive force due to overspeed that could not be absorbed by the battery, resulting in damage to the controller due … Read more
Failure Phenomenon Philips EPIQ7 machine starts up with no display on the monitor and touchscreen, control panel buttons light up, and the machine cannot be used normally. (as shown in the video). Failure Analysis and Handling Repair Process: 1. After the machine starts, although the monitor and touchscreen have no display, the control panel function … Read more