2015.10.17 13:13
Wave Tube Display 20 Ft
조회 수 4 추천 수 0 댓글 0
Pin - the Story
Among the most popular issues was display dumb. If you get closer to the screen and start to observe the show under environment that is dark the display could be really seen by you but it was extremely faint. The function of inverter board is to generate a a-c wave to power up the lamps which was found at bottom and the top . The inverter board would not light up that which you could see merely a faint screen and the lamps, in case it has problems.
When I first ran into such problems long time past and due to lack of advice I still could recall, I wasn't able to solve it. I did call-up my fix friends to asked about the solution but no one capable to give me a solution. Because of this I must do my own investigation to find the solution and I have never give up. I am releasing the remedy simply to my devoted members or subscribers only-thanks for your own support.
Let us start now! After the internal aluminum casing and the cover were opened 's saw two bulged filter capacitors at the secondary side of switch mode power supply. The value was 1000 microfarad 25 volts and 470. 's saw four more electrolytic capacitors located at the inverter board have changed color and the worth was 4-7 micro farad 25 volts. Browsing through the whole board with 's' meter I found still another capacitor defective (220 uf 25 volts) which was near the fuse (3amp). I presumed that way may be given by the fuse at the same time since this capacitor was located at the exact same line with the fuse. True enough, assessing the fuse with the ohmmeter revealed that it's open-circuit.
Now, the real issue after replacing the components above the LCD Monitor all faced by several electronic repairers who copes with this model was still would not work-it's still faint! First you have to ask yourself why the fuse blown? Could it be a result of the faulty capacitors or something? The nearest circuit to the fuse was the beginning circuit that consisted of a pair of NPN and PNP digital transistor (4k7 4k7 resistor built to the transistor). Some other LCD monitor created used the mixture and A733 in start circuit. By how the part quantity were the A6J (PNP electronic transistor) and the A8J (NPN digital transistor) as shown in the image.
Sometimes only these transistors have difficulties (shorted) that caused the fuse to blow out however in the instance that is aforementioned both electronic transistors are tested acceptable. Since both transistors were functioning, now the attention must be in the four ic's that generate the high voltage transformers because the 12-volts voltage was supplying these ic 's to each. These 4 ic's have the most typical one and also many part numbers that the producer used was 4532m. The AD4E10 and BBD3N13 component quantity was used by some board. Right now it's quite hard to get the datasheet or technical specification because of this amount even in the internet search.
Do you know what's inside these IC's? It's truly a pair of P-station and an N-channel mosfet assembled into it. And would you understand that it may be test with a meter? Yes, if you are using the Peak atlas component analyzer, it might prompt to you the result. From the above evaluation I discovered two of these ic's have shorted. The LCD Monitor is put by replacing IC shorted with fuse and the capacitors again to life!
If you cherished this article therefore you would like to acquire more info relating to wave tube display 10ft vertical curve (www.youtube.com) kindly visit our own web page.
Among the most popular issues was display dumb. If you get closer to the screen and start to observe the show under environment that is dark the display could be really seen by you but it was extremely faint. The function of inverter board is to generate a a-c wave to power up the lamps which was found at bottom and the top . The inverter board would not light up that which you could see merely a faint screen and the lamps, in case it has problems.
When I first ran into such problems long time past and due to lack of advice I still could recall, I wasn't able to solve it. I did call-up my fix friends to asked about the solution but no one capable to give me a solution. Because of this I must do my own investigation to find the solution and I have never give up. I am releasing the remedy simply to my devoted members or subscribers only-thanks for your own support.
Let us start now! After the internal aluminum casing and the cover were opened 's saw two bulged filter capacitors at the secondary side of switch mode power supply. The value was 1000 microfarad 25 volts and 470. 's saw four more electrolytic capacitors located at the inverter board have changed color and the worth was 4-7 micro farad 25 volts. Browsing through the whole board with 's' meter I found still another capacitor defective (220 uf 25 volts) which was near the fuse (3amp). I presumed that way may be given by the fuse at the same time since this capacitor was located at the exact same line with the fuse. True enough, assessing the fuse with the ohmmeter revealed that it's open-circuit.
Now, the real issue after replacing the components above the LCD Monitor all faced by several electronic repairers who copes with this model was still would not work-it's still faint! First you have to ask yourself why the fuse blown? Could it be a result of the faulty capacitors or something? The nearest circuit to the fuse was the beginning circuit that consisted of a pair of NPN and PNP digital transistor (4k7 4k7 resistor built to the transistor). Some other LCD monitor created used the mixture and A733 in start circuit. By how the part quantity were the A6J (PNP electronic transistor) and the A8J (NPN digital transistor) as shown in the image.
Sometimes only these transistors have difficulties (shorted) that caused the fuse to blow out however in the instance that is aforementioned both electronic transistors are tested acceptable. Since both transistors were functioning, now the attention must be in the four ic's that generate the high voltage transformers because the 12-volts voltage was supplying these ic 's to each. These 4 ic's have the most typical one and also many part numbers that the producer used was 4532m. The AD4E10 and BBD3N13 component quantity was used by some board. Right now it's quite hard to get the datasheet or technical specification because of this amount even in the internet search.
Do you know what's inside these IC's? It's truly a pair of P-station and an N-channel mosfet assembled into it. And would you understand that it may be test with a meter? Yes, if you are using the Peak atlas component analyzer, it might prompt to you the result. From the above evaluation I discovered two of these ic's have shorted. The LCD Monitor is put by replacing IC shorted with fuse and the capacitors again to life!
If you cherished this article therefore you would like to acquire more info relating to wave tube display 10ft vertical curve (www.youtube.com) kindly visit our own web page.