Re: vizio amber light E321VL
I have 2 of these TV -- one that works and one with the same no power/ amber light symptoms. The broke TV is getting the same readings on U8. When the working TV is off, all 3 pins on U8 is reading millivolts; when it is on, it is getting the same readings as the broken TV. This leads me to think that U8 is OK and that there is a problem upstream from here. Please advise me on how to proceed. Thanks
costinvint
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Last Activity: 04-10-2012, 07:00 PM
Joined: 12-08-2010
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Re: Is this high-voltage transformer OK?
In summation,
I got the new inverter (ZX421 small 4 lamp CCFL universal inverter for LCD) from ebay and now everything works fine. So, thanks to everyone who helped.Leave a comment:
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Liquid crystal leak?
Hi, I have never seen this before and I was wondering if anyone else knows whats happening here.
The screen is not broken and the whole display is correct, but there are blotches of a black ink-like liquid in the screen. The ink can be pushed / moved slightly by wiping with a lot of pressure, but it stays in the same general area. I took the screen out to get the backlights for another monitor, and the ink is contained in the TFT glass.
Usually when the screen is broken you cannot see the image below and to the right of the fracture because the bussline to those... -
Re: Is this high-voltage transformer OK?
That was a typo, I did mean 3.5v on the 3d pin. The first two are 19v.
Anyway, Im throwing in the hat. I cant trace threw all those little SMDs on the front and back of the board. I bought a [URL="http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110642249936&ssPageName=STRK:MEWNX:IT"]similar board on ebay for $11.40 delivered[/URL]. Its not the same one, I couldnt find that, but it has the same 6 input pins (1,2-VCC;3-ON/OFF;4-Bright;5,6-GND) and should do the trick.
I want to thank everyone...Leave a comment:
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Re: Is this high-voltage transformer OK?
I found the diagram for FP5451A. Leg 16 is reading 2.5V and leg 9 is reading 19.5V. This IC looks OK, right? Now I just have to trace . What exactly will I be looking for when I do this?...Leave a comment:
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Re: Is this high-voltage transformer OK?
Q6 and Q4 seem OK, if I am reading that datasheet correctly. I marked-up the photos to show continuity....Leave a comment:
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Re: Is this high-voltage transformer OK?
Thank you. [URL="http://pdf1.alldatasheet.com/datasheet-pdf/view/136100/AOSMD/AO4411.html"]Here is an indirect link to that datasheet[/URL].Re: Is this high-voltage transformer OK?
Thank you. [URL="http://pdf1.alldatasheet.com/datasheet-pdf/view/136100/AOSMD/AO4411.html"]Here is an indirect link to that datasheet[/URL].Re: Is this high-voltage transformer OK?
Thank you. [URL="http://pdf1.alldatasheet.com/datasheet-pdf/view/136100/AOSMD/AO4411.html"]Here is an indirect link to that...Leave a comment:
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Re: Is this high-voltage transformer OK?
I hope these extra picture help; I took so many, I didnt know witch to include. As for the data sheets, im having a hard time finding them. I think Q4 reads "441 BE461S" or "441 BEA61S", and Q6 look like "4411 BE461S" or the last letter might be a "8", but I cant find the datasheet based on these. I took pictures of these ICs and I tried to enhance some to show the numbers better.
One more thing I may not have made clear, I dont know if it makes a difference but, the backlight...Leave a comment:
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Re: Is this high-voltage transformer OK?
F1 is OK. I think Q4 and Q6 are short, but im not sure how to test these, so I included all the resistance measurements in the pictures. I hope its OK to test these in-circuit....Leave a comment:
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Re: Is this high-voltage transformer OK?
Ok, I found it. I was being lazy and just checking for the beep -- I mistakenly thought that was good enough, but when I check the resistance the legs with the question marks are connected! One transformer reads 468 and the other 485; that must be the secondary winding. The other legs all read between 0.5 and 0.9 ohms.
So based on that , I now think these transformers are OK. What else could be wrong here?Leave a comment:
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Re: Is this high-voltage transformer OK?
Ok, thank you for your help so far. The transformers are both stamped "YST-1709 0514". I took another picture showing the continuous legs. The ones with the question marks are not continuous with anything and the wire attached to them looks the same. Could this be the open secondary coil?
In any case, I think this is the faulty part. Can anyone suggest how to find replacements? I can get[URL="http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110642249936&ssPageName=STRK:MEWAX:IT"] a similar inverter...Leave a comment:
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Is this high-voltage transformer OK?
Hi, this is my first post here and I hope you can help me.
Im working on a 'Elo Entuitive 1725L-MSR'. The display turns on, but there is no backlight. I tested the lamps with another inverter and they work well. The inverter is getting 19V on the first and second pins, and 3.5V on the second when I turn it on -- this then goes back down to 0 after 1 second. The fuse is OK and I changed the bad capacitor on the inverter board.
Now I am looking at the transformers, and they are both open on the secondary side. There is no continuity between legs 1 and 3; or taps 'a'...
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