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Hello, I'm not sure if this is the correct section, but it seemed the most relevant. I've got an LCD monitor that turns on and displays a picture very nicely, for about 3 seconds before the backlight turns off. Now, since I get a nice display, I can assume that the actual light bulb (cold cathode) is working fine and the inverter board is the pa
I am actually trying to find the pinouts from the inverter board.
I am replacing a 5pf 6kv 5% ceramic disc capacitor on an LG LCD screen inverter board. I can only find one that is 10pf, not 5. It is still 6kv and 5%. Is this a big no-no? Or ok? I just don't know enough, trying to save some $ by fixing my screen myself. Thx, Dan
I need to know if there is a compatible n-ch mosfet for these specifications. 863-NTP45N06LG is the mouser electronics pt number. 2x On Semi 60V 45A TO-220 N-Channel FET is what I need to repair the inverter board for an lcd backlight, but it is as if this particular FET has been discontinued because I cannot find it anywhere and I do not know how
Hi the inverter is driving the back light lamps and ur screen will be dark and unreadable if u have a bad inverter or lamps . check that the inverter is working using a good working lamps or replace the inverter board otherwise u need to replace the back light lamps . Kind Regards
I am buiding a DC to AC step-up inverter. And in the primary circuit, there is a plastic film capacitor (SMD) 0.022uF which fails to work under the condition of ~100 KHz, rms. The capacitor spec is shown below. Can anyone advice am I using a wrong type of capacitor. Or should I use a ceramic one instead? Thanks:) Rated voltage 25
hi all i have hisense lcd with psu inverter board rsag7.820.1459/roh ver.f their is an smd ic,S AND RESISTORS BERNT PLEESE CAN ANY ONE HELP THANKS AND REGARDS
Hello, I need a schematic diagram for powersupply / CCFL inverter board YPLM- M002A. This board is a part of LG monitor 1515S. I got a schematic on net for LG-1515s, but the ccfl section is completely different form the board I have. (may be the powersupply board might not be YPLM-M002A) .LG (...)
My monitor will work fine for the first 15 minutes and then it will turn off the screen but keep the power light on. If I turn it off and back on I can get about 3 more seconds out of it until I let it rest. I have been looking over other threads and I have checked to see if it is the monitor and it is. I have checked the 4 capacitors ( 680uF 25
My monitor will work fine for the first 15 minutes and then it will turn off the screen but keep the power light on. If I turn it off and back on I can get about 3 more seconds out of it until I let it rest. I have been looking over other threads and I have checked to see if it is the monitor and it is. I have checked the 4 capacitors ( 680uF 25
did you try to open the monitor? first thing you do is to isolate the power section or the power supply(inverter board) check electrolytic capacitor 2 or 4 pcs holding 5volts supply and 12volts supply this are the common parts fail during operation.
I know this thread is a bit old but since it's one of the top result in Google I thought I'd share: The service manual and a video on repairing the power inverter board can be found at: Acer AL2017 Repair | FettesPS
hi bubba21, lcd power circuit e-capacitor making like thiskind of problem. if you change faulty capacitors your problem solved.bye..... Hi here the circuit diagram for this model including power supply and inverter board circuits , hope it'll help u :) Kind Regards
Monitor model : VG2030WM Power supply/inverter board: 2202136300p Has C809 blown, also fuse resistor R835 is open, R812 (SMD) and R811 (SMD) are open Q801 measures like a nail all way around. So need schema to check further. Thanks, -Jan
hello colleagues :evil::evil::evil::evil: it is very important for this sm need to know how to enter to adjustment processing mode to reset lamp error detection this is very famous problem in this set any help r welcome by the way this is some photo to the psu and inverter board both in one board any one have similar sm for this tv or (...)
Hi all, on my 240v welder the input power is routed to 2 bridge rectifiers one for each leg. It then goes to a bank of large capacitors and then outputs to the inverter board. My DMM reads +110VDC and -110VDC as expected when referenced to ground and 330VDC with a probe on each. The odd thing is, I read 240VAC on each leg with reference to grou
Hi all, looking for a service manual for this monitor. Power+inverter board and separate main board. both these boards by BENQ marked 48.L9502.A01 and 48.L9501.A00 TIA & Rgds
hi Mahaju.. For my Touchscreen monitor.There are 3 boards.inverter board,touch board and vga board.you need to know which board that cause your friend's lcd won't turn on.u can try to check all the capacitor at the vga board.Normally capacitor fail will cause your monitor (...)
Hello I'm new in both this board and Electronics. :-D The MOSFET of my LCDs power inverter board is out. Dual N-CHANNEL AP9971GM BVDSS 60V RDS(ON) 50mΩ ID 5A Here is circuit diagram of the board: 61926 So my questions are: 1. Can I use 2 Single Channels instead of one Dual Channel? 2. I can't find AP9971G
For Test you can use old LCD monitor inverter board for testing as i can use broken l.c.d panel monitor circuit board as a C.C.F.L tester. You can got it from scrape of l.c.d monitors. ---------- Post added at 01:59 ---------- Previous post was at 01:59 ---------- For Test you can use old LCD monitor inverte
check for any parts for high temperature if not then disconnect TCON board or inverter power socket and check.
what model no.? it is batter to disconnect power supply cable from inverter board.
I am trying to replace a part from my Westinghouse TV inverter board but I do not see the solder points at the back of the board. The board on the back side is simply smooth green. Nothing protrudes out of it. How do I unsolder the bad component and solder the replacement? Do I just do it from the front side of the (...)
My dell 1545 laptop is dim display (15.6 l c d). inverter board voltage is okay,i change new l c d and inverter board..did not get bright in l c d..can you help me...
my siemens espirimo 6535 is dim display...ccfl is not working... 1.change inverter board.....same problem 2.change lcd(15.4).......same problem 3.check inverter board voltage....getting 18 and 3.3v... pls help me......
Hi, I usually end up writing loads when I ask for advice, I'll try to keep this short. Right, I'm designing a fairly simple CPLD development board for a MACH4A CPLD. I would like to be able to have a wide selectable range of frequencies for the system clock without having a programmable PLL or thousands of jumper settings, trying to keep this a b
Hi! I have task to build interaface (PCB) between existing board with PIC16F873 (28pinPDIP) and dsPIC4013 (40pinPDIP) I have to remove PIC from board and make some adapter in order to connect dsPC with that setup (3ph PWM inverter for AC IM). That adapter must be removable in order to put PIC again and vice versa. I am total begginer (...)
you can use (push pull or) amplifier (rf amplifier / uhf amplifier ) for that use rf range transistor . followed by schmitt trigger inverter from high speed logic such as MECL , 74S , 95H etc which has less gate delay even HCL will not work ( ~ 7 ns ) i think!. no no , first tell about signal whether it has fix frequency or not , fix voltage
i'm building a inverter DC-AC (240V)with 2 pmos and 2 nmos. These mosfet's are using opto coupler and darlington npn to drive the gate. i'm facing problem on the connection between opto-coupler and darlington npn and the mosfet,can anyone help?...Besides,izit any test board can use to test my circuit which supply 240V?....
inverter pcb for backlight in an LCD monitor model PV-1710. One of the output capacitors has burnt up. It is on the output of the board (feeding the tube) and is labeled 33J 3Kv which I assume is 33pF at 3000v. Can anyone confirm this value? Farnell says 33J is 33nF but I believe the J is tolerance fo 5%. Is the 33pF value critical? What
I bought a Polaroid 15" LCD TV (TLA-01511C) with a bad inverter with the intention of repairing it. However, I did not know the inverter on this model is not a seperate unit. It is right on the PSU. The PSU itself seems to be fine, since it does turn the TV on and keeps it on. But the screen comes up fine for about 5 minutes then the backlights tu
Hi, I am looking for a capable electronics hardware design engineer to assist in the development of a versatile dc to ac inverter as well as a unique charging system. We will accept schematics and/or to include a completed working circuit board. Our time table is immediately.
i would like to join (or start) a Grid Tie inverter open source project. does anyone know if there exists such a project? i could probably design such a thing myself but it would take me a long a$$ time, so i'm looking for more team members. Mr.Cool
You can build an inverter for 3000W no doubt. For 12 V you will 250amp current assuming your circuit is 100% efficient. Sure you can build with a higher input voltage, but it comes with a lot of cons. And you cannot cool it with a PC circuit fan. You might need to cool it using oil.
If you use a transformer it should be used on the AC side of the inverter. Because transformer only changes amplitude of ac voltage. You can first convert the 12VDC to ac signal using an inverter. If you use a common full bridge inverter the AC output of the inverter is less than the DC input. Therefore you will get AC (...)
I have been looking into high contrast LCD and now there are LED panel available which is driven by lower voltage (less than 40V) thus the LVD does not apply. The issue with CCLF that it requires 500V inverter O/P from 12V I/P mounted next to the LCD panel. The LCD and inverter is mounted inside the case with no exposure to operator. I know
The fans are inductive loads, and will be naturally be affexted by the waveform you are generation (PWM ) in your case, while the board suppplies sine. This is spped change can be usally seen in 90% of pwm inverters. It also depends on the core of the output transformer, the quality of the winding wires and the output drivers (wether mosfet, igbt o
Hi, In the PM, you had asked for a better circuit. Here is with SG3525 would be nicer, but this will do quite well. You could change the MOSFET gate resistors to 22ohm. Look
Hi. I am trying to make an inverter circuit. The thickness of copper on my pcb is 35 microns (.035 mm).. to carry a current of 12 A how much should be the track width.. The base material for the pcb board is glass epoxy .. any precautions to be taken for this current level ?
I have a 230VAC inverter that is only giving me about 197VAC with no load, and about the same voltage with load. on a three light voltage tester only the center light illuminates. Any ideas what controls the voltage output of inverters?
Guys, I've tried to study full bridge inverter for driving the CCFL lamp with a development actual board that I have. Actual board work as expected but the simulation doesn't seem to coorelate well with the actual board. Here are some of the detail. On actual board, There's a single chip CCFL full (...)
The simplest solution by far would be to use an inverter to power a standard PC power supply.
It is a dual-phase inverter with dimensions of 97mm x 59mm x 16mm. You can reach 5,5A for Uout=19V and 7A for Uout=15V at input voltage 12V. The higher voltage 14V at the input (the car engine on), you can obtain 6,5A for Uout=19V a
This PCB of 600Va quazi sine inverter is manufactured somewhere in Kerala (India) and is widely used as an replacement for old inverters which are bulkier. The PCB is available in local markets for just 600INR or 12USD
Hi every one, I am getting a problem about ATV61 inverter of Schneider brand. It is normally useing to control a fan which it's power is 30KVA/ 3 phases/380VAC. After then it displays a error: nLP ( no line power: L1, L2,L3) Although there is a power line 380V/3phases. I checked the input voltages on Power board (the board controlls 3SCRs (...)
Hi, I am currently designing the control stuff for a mini laser cutter but firstly I need a breakout board. I am a mechanical engineering student so forgive me for dumb electronics questions but one of the reason why I want to do the design from scratch rather than simply buy or use someone else design is to learn electronics. [URL="https://www.
IR2110 getting demaged in full bridge inverter with MOSFET and Arduino Hi everyone! I've been in the forum for a while, reading and analysing the posts much more than posting, trying to find threads were the solved problems are similar to mine... In many situations I've found answers to my questions, but this time it didn't happened, so I'm
hi frnds i have an inverter pcb of pic 16f72 which is the new version... i studied the whole circuits and traced them.. but i cant complete it since i dont know to drive the gate of the mosfet.. so if any one can help me.. plz do ur favour... i need the source code...
A 12V to high voltage inverter is likely to cause considerable interference on the supply line and I suspect your ADC is reading that and getting wrong information about the state of the battery. When it decides to turn the lamp off, the interference is removed and the lamp tries to turn on again, it gets into an oscillating circle. First, confir
Hello My Friends I'm Working in P.SW inverter ..i've made the DC-DC Stage and Tested it .. my only problem is with the H-Bridge Stage .. i read about the SPWM and have the table ... but dont have a complete schematic for the Microcontroller PIC driving the H-bridge and sure don't have the Hex code for the PIC and never dealed with microcontrolle


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