Fast thyristors (Inverter Thyristor)are used for higher frequency rectification. Inverter and inverter circuit appliances.
Rectifiers have many uses, but are often found serving as components of DC power supplies and high-voltage direct current power transmission systems. Rectification may serve in roles other than to generate direct current for use as a source of power. As noted, detectors of radio signals serve as rectifiers. In gas heating systems flame rectification is used to detect presence of a flame.
Inverter Thyristor,Power Inverter Thyristor,Frequency Inverter Thyristor,Electronic Component Inverter Thyristor YANGZHOU POSITIONING TECH CO., LTD. , https://www.cndingweitech.com
model:
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Fault phenomenon: black screen after the TV screen is turned on after the boot
Disassemble: the target is directed at the backlight
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This machine has two sets of backlight power supply cable, the boot backlight voltage is normal, the cable 1 and 2 pin are the LED positive power supply, the 3-10 pin is the negative LED1-negative LED8, and the backlight control. 3, 4 feet are actually empty feet, remove the cable, the pointer table uses 1K to measure the resistance of the two groups of backlight power supply 5-10 feet to ground, the black test pen is grounded, the resistance is around 25K, you can basically determine the problem point On the light bar inside the screen. Decisive screen
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46-inch large screen, limited conditions, removed and scared a cold sweat Fortunately, some 42-inch pieces were removed before, but it’s really not quite sure.
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There are more than 100 lamp beads, and there is no blackness or light pain in the visual inspection. . Is it a mistake?
...... Power on, to see which lights are not bright, the left light bar is off, the one on the right is not bright, no! Are there any bad or false welds in the 6 groups? Remove the light bar on the right and measure it with a multimeter. My God! The head is big.
... calm and calm! The positive voltage of the power supply is normal, and the resistance of the negative terminal is also the same. It is very likely that the problem of the cable is to check the end of the backlight board. There is no abnormality. Remove the light bar. Unexpectedly, the gold finger of the cable is folded. Use a multimeter to measure the open circuit. Look carefully to see the broken marks. I found it, I was so excited.
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Immediately contact Ma Yun, but did not find such a cable, the right cable is more than 1 meter long, this is a bit difficult, what should I do? Asked a circle of peers and after-sales are not, it seems that only zoom in, remember to have processed this cable before, still have a certain degree of certainty
Cut off from the starting point with a utility knife, cut off the two sides, put the cable on the flat glass, be sure to use a new blade, evenly scrape layer by layer until all the gold fingers appear, no processing You can experiment with the bad cable of the laser head.
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This is the two ends of this long line, compare it
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The cable is connected with the light bar, the power test machine is on, and the two light bars are all lit.
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Now I can't care about it. The 46-inch screen is not easy to remove. It is not easy to install it. I will call my wife and help me to install the screen.
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After installing the screen, the boot, the sound map is good, finally you can breathe a sigh of relief, the weather is cold, typing and posting are much slower than usual, I do not know whether it can be refined