JAV (Jie Aiwei) color TV HDTV29M16 lights flash does not boot maintenance small note - appliance repair - Huaqiang electronic network
Model: JAV (Jai Aiwei) Color TV HDTV29M16 [Japan JAV Electric Co., Ltd. (China)]
Fault: The red light is flashing when powered on, but the TV doesn’t boot. According to the user, the TV has been used continuously for a long time and only recently started having issues. After checking, I found that the high-voltage cap was ruptured and had arced, with visible traces on the outer casing. It’s unclear if the flyback transformer or the field output transistor were also damaged. There are quite a few cold solder joints, but this is the first time the user has reported the issue. After a rough estimate of the repair cost, the user who lives nearby was quoted three reds and reds, but he decided to go ahead with the repair right away! That’s always exciting to hear—especially when you have the part in stock and the user agrees after a quick chat. We scheduled it for three days later, and he agreed without hesitation. So, let’s get started.
I went to a local parts store and found that they don’t have this specific component. I had to go to Ma Yunjia to source it. While there, I also contacted the user again and confirmed the order. However, it was November 11th, 2015, so the delivery was delayed until yesterday. Fortunately, the courier did a great job and delivered it on time. I packed up my current work and took the part with me to start the repair.
What surprised me was that both the block and the field block were still working fine. The line voltage and surrounding components looked good too. Still, I had to be careful. After checking the voltage levels, everything seemed normal and stable. When I turned it on under load, *whoosh!* That sound made me really happy. The audio came on, but the screen was blurry with green corners and pillow distortion. I carefully adjusted the focus. Brightness and focus were okay, but the green and image pillow distortion remained. I thought, “It must be the degaussing resistor!†So I removed it. Wow, that was it! I had a 14R resistor in hand, but the correct one was 18R.
The pan-green disappeared, and the image became clear. But the pillow distortion was still there. Was it the pillow capacitor? I’ve seen similar cases before. If that wasn’t the issue, the new one wouldn’t work either. Could it be the flyback transistor? But there was something strange in the periphery of the board. Then I noticed an adjustable component next to the affected area. I gently rotated it, and *voilà *! The pillow distortion vanished, and the image filled the screen perfectly with great clarity.
I didn’t want to put the case back on immediately. I left it running for nearly five hours, and everything worked perfectly. At this point, the TV was fully repaired and ready to go back to the user.
Industrial UPS is a specialized power protection system designed to provide backup power to critical industrial equipment in the event of a power outage or fluctuation. It is commonly used in industries such as manufacturing, oil and gas, chemical processing, telecommunications, and data centers.
Performance:
Industrial UPS systems are built to withstand harsh environmental conditions and provide reliable and stable power to sensitive equipment. They offer high levels of protection against power disturbances like surges, spikes, sags, and voltage fluctuations. These UPS systems typically have a high fault tolerance and can provide instantaneous power transfer during a power outage, minimizing downtime and preventing damage to equipment.
Industrial UPS systems can deliver power in different forms, including online, line-interactive, and offline. Online UPS systems provide continuous power protection by continuously converting AC power to DC and then back to AC. Line-interactive UPS systems regulate voltage fluctuations while being connected to the AC power source. Offline UPS systems are the simplest and provide basic power backup during outages.
Application Scenarios:
1. Manufacturing: Industrial UPS systems are crucial in manufacturing plants where downtime can result in significant financial losses. They protect critical equipment such as robotic systems, programmable logic controllers (PLCs), and control systems, ensuring uninterrupted operation and preventing data loss.
2. Oil and Gas: In the oil and gas industry, UPS systems are used to safeguard critical equipment like pumps, compressors, and control systems. They ensure uninterrupted power supply, which is crucial for maintaining safety and preventing accidents in hazardous environments.
3. Chemical Processing: Industrial UPS systems are essential in chemical processing plants where precise control of equipment is necessary. They protect sensitive instruments, control systems, and data acquisition systems, ensuring uninterrupted operation and preventing loss of valuable data.
4. Telecommunications: UPS systems play a vital role in the telecommunications industry, protecting critical communication infrastructure such as servers, switches, routers, and data centers. They provide uninterrupted power supply, ensuring continuous connectivity and preventing service disruptions.
5. Data Centers: Industrial UPS systems are widely used in data centers to protect servers, storage systems, and networking equipment. They provide backup power during outages, preventing data loss and ensuring continuous operation of critical services.
Uninterruptible power supply, Industrial-grade, Reliable, Power protection, Backup power
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