A Konka LC32ES62 LCD, there is a backlight with sound but no image, after checking the FP1 insurance on the logic board to open the way, after looking for a change, the boot has a blue screen, but after a few seconds, this QP2 burst, I only see what the words of A3 are written on QP2. What is this? What is the use of this, why is it burned? I hope the master can give you guidance, thank you.
I can't rely on myself on this question! LCD has not been repaired, after getting to know the Internet (it looks like CRT TV) and then toss yourself! I don't know if I check the Internet again. The mobile phone check is tiring... There is almost no fault in the logic board of this machine on the Internet. I haven't seen anything worth learning for one night! Later changed the maintenance thinking, starting from the TPS65161, and sure enough, a good thing finally came out, looked at the PDF and related peripheral circuits, 27 feet is to control the tube that was burned! There is no obvious short circuit to the ground with this foot, which proves that the MOS connected to the 27161 internal 65 feet has not obviously penetrated! That is to say, TPS65161 may not be broken. At present, it is only repaired along the 65161 without bad thinking, because I don't have this chip in my hand! Since the characters can be displayed for a few seconds before, the screen should be fine! Then check the Internet, QP2 should be a P-channel low internal resistance field effect tube, just have Fairchild FDS4435 in hand, the rest of the previous 1879 charging board! Do not try to try, say dry, after the foot line is good, install 3A insurance, power up... The image comes out, and the spirit is cool! After half a minute, suddenly there was no more. This time, I was not so stupid. I immediately turned off the power and reached out to touch the key parts of the main fault of the logic board....... This touch is amazing, and I almost didn’t care for me... How is the 10uH inductor so hot, but the 4435 and 65161 are only slightly warm, is there a problem with this inductor? ? Later, I found a big power to install it. The test machine was more than an hour. The key components were only lukewarm. The fuse should be the inductor. The reason is unknown. In short, it is repaired, and the repair is over.
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