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ZGAR 1.0 E-Cigarette Vape Pen,ZGAR 1.0 Disposable Device Vape,ZGAR Vape Pen Device 1.0 Atomizer,ZGAR Vape Device 1.0 Disposable E-Cigarette OEM vape pen,ZGAR Vape Device 1.0 electronic cigarette ZGAR INTERNATIONAL(HK)CO., LIMITED , https://www.oemvape-pen.com It is said that in July 2010, a Hisense TPW4211 plasma fault has no sound (black screen). I have not touched the LCD plasma TV before. I just want to practice my hand and tell the customer to go home and other news. Turn on the TV, the plug is intact, and no obvious original damage. Check the information on the Internet first. Basically, the network says that "the power board capacitors C523 and C524 are too close to the heat sink, and work in a high temperature environment for a long time, so that the capacity is gradually reduced", so the capacitor is replaced. Or not. I have nothing to do with this, but I want to find after-sales! So the warranty, after-sales said that the report has been reported, at their own expense, first check the problem in the quotation, if you do not repair also pay 50 yuan inspection fee, I said good. Later, I called the power supply badly, and changed the power board 1000 yuan, so I quoted the user for 1,200 yuan. At this time, the user just moved (the local business in the field), and did not take it, so the low price was given to me.
Later, I think 1000 is too expensive, and in case other places will be broken afterwards, it will not be worth it! Later, I turned to a senior engineer who told me that there was no such thing, so I thought I would open the piece, let it go first. I know that before the Spring Festival, I saw online shopping accessories on the Internet (I never thought about it before). I found the same power board on the Internet only 400. I wanted to have one, but I would like to have a problem with the mail order. Or is it not a power supply? What about the board problem? So I put it down.
Until the first two days, I registered the forum to know, so many enthusiastic peers, I have the idea of ​​repairing the power board (said that the power board is too complicated, then a TV of more than 10,000 at that time), I just want to practice. Then a few days to bubble forum, make friends to study.
Power Board
Text: The plug-in power board relay rang, the power supply is basically no problem. Look: the status of the logic board small light, if the small light is long, does not go out, it is the signal processing board problem, check whether the power supply of the signal processing board is short-circuited, whether the power supply of the high-frequency part is not powered, whether the power supply of the VPC3230D is normal. If the small lamp is more stable and flashing, the signal board and the logic board are normal, and the screen is still not lit, which is basically a drive circuit problem, or a power board rear stage failure.
I carefully observed that the small lamp is more stable and flashing, indicating that the signal board and the logic board are normal, basically the drive circuit problem, or the power board rear stage fault. Remove the power board of the whole machine, and short-circuit the PS_ON pin of the CN802 to the ground. If the power board works normally, the voltage of each channel can be output normally. The standby 5V voltage is normal, and the measured VS voltage rises slowly after starting. To 30V (normal should rise to 91V), measure B+PFC voltage 380V is normal. Explain the problem of the power board, I carefully measured the search results and found that the two capacitors were broken as shown in the figure, and replaced (we have no parts supplier, two of them are removed in the waste board)
Test machine, hahahaha! ! !
I can't express it in words! I want to scrap the 13,000 plasma, and I didn't spend a penny, OK! Hey!
Here are some information about my repairs, I hope to help everyone! In addition, the LCD plasma is not so difficult! Plasma TV TPW-4211 principle and maintenance.part1.rar
Hisense tpw42110.pdf
Plasma TV TPW-4211 principle and maintenance.part2.rar
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