Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
Defo much handier to just replace the board which if I'm honest saddens me cos I would have loved to get this one going but too many faults.
Anyway Freakaftr8 what do you mean by "pull the middle leg" on the IGBT seeing as I can't mess this board up any worse. I might as well use it as a soldering practice and to learn a bit more.
Oh and don't worry Andrew I'll be sure to turn the Va and VS etc back down before fitting the new board.
Simon...
Simyc1
Member
Last Activity: 06-13-2018, 06:46 AM
Joined: 05-14-2018
Location: Donegal
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
So far....
I've located 2x IGBTs that don't buzz on the multimeter (the other 10 do buzz when testing the middle prong). One on each on the heatsinks... (big silver units??).
If these are the source of my problem.... And based on my skill at soldering (or lack of skill lol)... it may well be easier for me to switch out the whole board. I Which is likely to set me back £20-30 quid..
If someone could just confirm that this could be the source problem or should I be checking other things first....Leave a comment:
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
I'm guessing this is the easier said than done part, and just to idiot proof my approach, Am I doing the same thing again with the multimeter...
Connect to ground and touch each IGBT/Transistor/Capacitor...
(If it beeps its shorting to ground)
and/or
Checking across each one of these things (eg Multimeter on one side of a capacitor and then the other? if it doesn't beep its faulty).
I swear I must be on the autism spectrum, in terms of needing things spelt out...Leave a comment:
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
For the next hour - Call me the Beep Hunter!!!Leave a comment:
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
Lets Try again, knew something was wrong when I couldn't find anything online using the barcode number, so reviewed the board again, and with a little help from youtube and shopjimmy -
[url]https://www.youtube.com/watch?v=R1jmj_foId0[/url]
I found the right part number (see pics)
PCB No: LJ41-05987A
PBA NO: LJ92-01515A/B/C/D/E/F/G
PBA Rev: EA1
I know the PBA number should only have one letter at the end, but the board didn't have one crossed out to indicate which letter...Leave a comment:
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
Cheers R J,
I'm not 100% I've done this right but I tried to check for a "short between ground and the fuse". Nope, it blew right away!! Either it is too small, and I'll pick up a few 3As to be sure or there is something shorting out the board.
The board number is TA515EA188409X, and once I get back from my kids sports day, I'm gonna get on the case of searching the threads for problems with this board too.
Onwards and fault finding we go!!!
SimonLeave a comment:
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
Quick Update....
Following on from a distant lack of voltage on the board with VE on it (Zsus??). I decided to check if the actual fuse on it had blown.... (see pic).
Simple sound beep test on my multimeter confirmed that the fuse was knackered - So off to the shop tomorrow to pick up one of these lil bad boys.
Will give you an update if that solves the problem.
Regards
Simon...Leave a comment:
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
Cheers Sean,
Hopefully I'm on the right thing here to test the VE voltage (see pic), I had tried that before - the circular shape to the left of the Upwards pointing arrow with the letters VE just underneath - it did seem like the obvious place lol and then I got all confused when I wasn't getting any reading from it.
So anyway, this is still giving me nothing? No VE voltage reading. So I'm guessing theres something up with this area of the board?
Simon...Leave a comment:
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
Voltage Ratings Update
Right so I took some readings, under Andrews guidance (cheers) and used the TV Repair Reference Library thread for further assistance on how to do it and adjust the levels as necessary, and these are my findings.
Voltage - Required Rating (see pic), Actual Reading, Adjusted Reading
Vs, 205, 178.9, 193.5 (This was max I could get adj screw turned fully).
Va, 56, 48.9, 53.6 (This was max I could get adj screw turned fully).
Vsc, -190, -178.8, -190 ...Leave a comment:
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Re: Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
Sorry for delay, problem uploading from my mobile phone so, reverted tot he laptop. Ok so pics attached, hope they make sense.
I've included what the picture should look like v's what I have on my broken Plasma- Good Picture v's Bad Picture images.
You will also see a white image picture, this was a full white screen through the servicing menus, which as you can see is clearly NOT white, its is all grey and cloudy hazy.
Then you will see the black blotchy lava lamp like pictures,...Leave a comment:
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Samsung 50" Plasma PS50A457P1D Grey Blotchy Cloudy
Ok so here goes...
I've searched as much as I can for a similar issue and cant seem to find one. Basically turned the tv on one day and the picture was terrible.
Firstly, the screen started out black and slowly the picture came through almost like a lava lamp warming up, clearing the screen as it went, which look blotchy almosy as if an pil spill was being taken off. (See Black blotchy pics).
Secondly, the picture is a complete haze, really dull as if it has a grey cloudy veil in front of it. Its as if someone has drape the tv in an old net curtain... -
Re: New Members - please post your introductions here
Hi folks,
Simon Canning here and seeingas there was a load of Simons living nearby when I was young I became SimyC...
So anyway I live in Ireland and consider myself a have a go hero when it comes to things that get broken. People, cars, TVs, Washing Machines whatever.... if its broken I try.. and fix it. I have mixed results but always like to give back whatever i've learned along the way.
My latest project hahah is a Samsung Plasma TV, and I found this forum, so registered and started...Leave a comment:
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