Shunluo Inductance Power Inductor SWPA Series First Class Agent

Repairing a Hisense CRT model TF2919H, the issue was a black screen with sound. The customer mentioned there was no blur before, so I initially thought it wasn’t related to the convergence. I suspected the ABL circuit and discussed the price range (under 300 yuan) with the customer before bringing the TV back for repair. Upon testing, the main voltage was 128V, which was normal. The audio line was working, and the filament was bright. The three-gun voltages were around 145V. After replacing the tube socket without success, I paused the repair.

I then checked online forums and found similar cases where the acceleration voltage was missing. I tested the high-voltage board and found that the acceleration pole had 0V, while the tail plate measured around 400V. I considered possible causes: a shorted capacitor at the acceleration pole, moisture in the tube socket, or a faulty picture tube. After eliminating the first two, I tested the picture tube and found zero resistance between the acceleration pole and ground—definitely a bad tube.

The user suggested using a 250V/10μF capacitor, grounding the negative lead and touching the positive to the acceleration pole. But I didn’t know how to charge it safely, so I called the master. He explained the method: insert the new tube socket, ground the chassis, connect the meter to the acceleration pole, short the filament pins (to avoid burning them), power on, listen for the high-voltage sound, turn it off, insert the test pen into the high-voltage cap, and if the tube glows briefly, it’s fixed. The TV worked perfectly after that. It took a few shocks, but it was worth it!

This experience reminded me of my journey. I graduated from college 12 years ago and started learning repair by following my older sister (the master). She used to work at TCL’s after-sales service, but due to age-related vision loss, she switched to running her own shop, selling TVs, assembly machines, and LCDs. She taught me everything from rice cookers to large appliances, even water heaters. If we couldn’t find a manufacturer, we fixed it ourselves. Service is key in small towns, and our after-sales support is top-notch. We handle everything from small repairs to complex issues like picture tubes.

When the customer said the 29-inch TV hadn’t been repaired in 9 years, I felt it was a shame to scrap it. I wanted to improve my skills. Young people must be self-driven, ask questions, and learn as much as possible. This year, I opened a store in another town, working independently to build my reputation and sharpen my skills. When stuck, I consult the master or check forums. There are many experienced professionals out there, and it gives me confidence.

On days when I have nothing to do, I visit forums to read maintenance tips. When I’m down, I scroll through the entertainment section. Seeing so many peers makes me feel less alone. Life is long, and there's always more to learn. I try to enjoy the process and keep growing.

Writing this article early in the morning is not only to seek guidance from experienced technicians but also to offer some help to young repairers like me. When you face common problems, check forums, follow advice from seniors, and after fixing something, share your thoughts with beginners. It’s a way to give back to the community and honor the hard work of the masters. I believe that sharing knowledge makes us all better. I hope the forum continues to grow and become even more helpful. In life, having one more care is always a good thing.