Re: samsung 50" plasma, no picture, no obvious short or blown fuse.
What is the panel Vset rating? Low Vset should cause a prominence of dead pixels.
What is the panel Vset rating? Low Vset should cause a prominence of dead pixels.
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For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: samsung 50" plasma, no picture, no obvious short or blown fuse.
It doesn't list one and there are no obvious signs of lost pixels.Comment
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Re: samsung 50" plasma, no picture, no obvious short or blown fuse.
Can you post the picture of the panel sticker? (Has Vs, Va etc on it.)Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: samsung 50" plasma, no picture, no obvious short or blown fuse.
You can see it all in the photos I posted at the start of this thread. I have put the back cover on again now.
I was wondering if it could be VSet + Va = Vs as that works out about right (173V).
I also have a theory that as the caps age, they cause ripple and spikes to find their way to the buffer IC's which blow, then take out the Y-Sus. Therefore if when the panel starts to show higher levels of noise and sparkle on the blacks (which I had for the last couple of months) the caps are changed, it may avoid the more costly and complex FET & buffer failures - just a thought....Comment
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Re: samsung 50" plasma, no picture, no obvious short or blown fuse.
Va has nothing to do with Vset and Vs, it is completely independent of those. Va is used to program the image onto the panel through the bottom X drivers. Vset and -Vsc is used to prepare the panel (priming.) Vs is then used to make the programmed image appear. There, you know how a PDP works
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Your theory has some merit. A lot of the time it appears on these boards a small electrolytic tends to fail. This probably causes the Vg (15V) to drop out. The drop in 15V leads to maldischarge (Vset/Vsc poor waveform) but also increased heating in the FETs. Perhaps this then leads to the FET failure, which proceeds to nuke the buffer board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: samsung 50" plasma, no picture, no obvious short or blown fuse.
Hi m8 can u post a picture of components you changed or part numbers hav same tv sound no picture ,seems identical prob just need to no wat parts and on what boards need replaced thanksComment
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Re: samsung 50" plasma, no picture, no obvious short or blown fuse.
There can be several causes of the fault, if you think it is the same as I had the you should do three things:
1) buy a standard repair kit for your y-sus board. eBay has them, just search for your y-sus board part no.
2) check for shorts on the buffer boards (youtube has info) and buy however many buffer ic's you need. If you haven't replaced fine pitch smd components before you may want to buy a whole board.
Don't power up tv with repaired y-sus with possible faulty buffer board attached, it may blow y-sus again.
3) replace any other capacitors that look swelled up.Comment
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I found a project in the electronics trash yesterday. A nice Argon SA1 audio amp with some electrical issue. Took it apart and saw that the 4A250V fuse was blown so started lifting components to find the short. Eventually got to two MOSFETs (model FTA14N50C) that are shorted and when i took them out the short was gone.
Now i didn't have any replacements of the same model of course but i found a couple with pretty similar spec i thought (K10A60D & K12A50D) and put them in. Also replaced the blown fuse with a 3.5A250V one. Checked another time for short circuit and plugged it in.... -
Hi I wonder if anyone might be able to steer me in the right direction. I have this Samsung UE46ES8000 TV and it went bang during use. The main fuse on the PSU board is open. I've checked every diode/mosfet/transistor I can see and nothing appears to be short to cause the fuse to go. The DC output of the bridge rectifier is not short either. I've seen online that some of these models are known for having their PFC mosfet or other mosfets shorting and blowing the fuse but i'm not seeing that here. If anyone aware of these models having any issues to cause this? I'm reluctant to just replace the... -
Saved this beast from the landfill this weekend.
Manfactured July 2013 in Mexico.
I love working on plasma TVs.
Its been a while but I was lucky enough to find 2 this week.
The TV powers on and stays on but no picture. Havent checked for sound yet.
No bulging caps although the insides are pretty dusty and the boards are discolored from many years of high heat.
Will start troubleshooting tonight.
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Hi Folks
I'm looking for a extreme high current short killer solution for a reasonable cost.
I have an LGA1700 motherboard (ASUS PRIME Z790-P WiFi) where I exchanged the LGA socket already 3 times, and every time after the socket exchange I get a short of power supply lines VCORE (V variable) and VCCIN_AUX (1.8V).
After taking off the socket, the shorts dissappear again.
The soldermask on the socket is already partially demaged from the heat, so I have reconstructed the soldermask by manually painting the missing soldermask parts with a very small top of a...10-15-2024, 10:13 AM -
Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.
The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.
Original T-con:
Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.
First replacement T-con:
I thought it might be t-con and ordered new t-con from china(supposedly tested)...
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