Xiu Cai repair TV: 34-inch Skyworth HD color TV maintenance notes - appliance repair - Huaqiang Electronic Network

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Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

SMD aluminum electrolytic capacitor

Dear friends, everyone!
From this time on, I will use "Xiu Cai Xiu TV" as the general topic of my maintenance technical articles. The technical articles I have always published are quite representative. The results that are too easy to judge are generally not published. The faults that are difficult to be misfigured and easily misjudged are given to friends as examples. Because now that I have a stable career, the maintenance work is not faced with customers who cannot refuse, or is a friend of a buddy, or a fault that others are not sure, so it is difficult. I think the technical article I sent may have some enlightenment and help for the novice maintenance.
Ok, gossip less, turn to the topic.
A Skyworth 34T86HT HD color TV, the fault phenomenon is that when the screen is turned on, the screen is sometimes red, sometimes blue, full screen cross-sweep line and the image is slightly trailing, the image is also dim. However, after about 50 minutes of playback, the image color is normal. The shutdown time exceeded 20 minutes and the fault reappeared.
Judging from experience, it is estimated that the possibility of virtual welding is relatively large. Disassemble the machine, the three-shot visual output of the tailgate is completed by three pieces of TDA6111Q. Look at the red and blue output integrated pins. It seems that there are signs of soldering, and the three pieces of integrated re-welding are repeated, and I want to finish it.
Boot, the fault remains. It seems that the judgment is wrong! Lenovo's full screen color cast fault, the idea turned to the video amplifier drive circuit.
First, the output points (operating voltage) of the output integration are taken as the standard, and the power is detected. Because there is no TDA6111Q information on hand, so search online, and now share the normal working voltage of the integration.

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