A long-window pt50618a plasma television, said the internal z plate and its upper screens were all burned, opened, and now the internal relays are ringing, and the second switch on the red and the green lights are blinking for about 10 seconds, but the screen is black. Circuits. It doesn't look so simple. Plasma protection circuits are complicated, especially with pine plasma protection circuits. The next day, after the long-window sale, the master came to see the plasma's wounds burn, even to interrupt me not to fix it, saying the screen was dead! I looked at the screen again and again, without a burnt sesame dots, and then two days later i didn't know what to do, and there was a feeling that even if i didn't, i'd have to go for it, and my personality would like to challenge myself and repair my life without a challenge. Ha ha! There you go again!
Electro-test panel vs va f15 has output, which is protected in less than two seconds, whether the p or y z plate is triggered? The lsjb1279-2 test was taken separately. Because there was no information, it was slowly repaired。
Pulling p6 (12 needles) p7 (12 needles) p25 (13 needles) plugs on board p-6 (12 needles), shorting p7 5-6 and p25 9-11, to be outlined here, short-term 5-6 is to open the main board cpu, short 9-11 is to open the main screen, thus bypassing the control of the main board and the logical board, with the power to export 5v 15v 60v 208 v volts, indicating that the power supply is normal, and the problem may be either yz or screens and other electrical roads, and because of the snowstorms throughout the country these days, short-term p7 5-6 and p25 9-11s have not met more times in the maintenance groups, nor have they answered or replied to abandonment!
It took almost half a day to get a sense of it,
Now that all three lines have been burned and protected, it's just that the long-window factory has not set a sign to protect it, which is a major obstacle to maintenance. During the normal operation of the protection circuit, there was a voltage output to r1622818 r1682819 r1622820, respectively, which caused the diode to reverse the cut-off, and 15v voltage to push through the steady pressure diode d16282, which allowed q16280 to channel the output low level, mmu to work. Q16280, on the other hand, by the end of output of high level 5v, which was sent to board a to detect a protection signal to the mmu by sos8 to stop the power supply and thus protect the machine from damage. The other protection was the sos6 protection point of scss board, which was the only criterion for determining whether sc ss board was working properly, and if sos6 had a problem, the output of high level 5v to a informed mmu. In order to determine which path to protect, an instant quick measure of sos6 sos8 was made, and the test point sos8 was found to be a 5v voltage, indicating that the line had been lost, and the line had been burned, since the ss sc plate had not found igbt short circuits, the three pliers would be directed to d16288 d16285. It's a two-column tube, and then the blue screen comes up... And it's only up to the maintenance staff to feel it, turn the machine up and see three wide bars on the left side of the screen. Oh, it's a hell of a machine. It's like a rock. It's like i'm in my heart right now. It's like i'm in my heart. It's like i'm in my heart to tell you that i don't panic!
