Re: samsung 58 inch plasma
also with the 3-4 jumper on or off ?
also with the 3-4 jumper on or off ?
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Re: samsung 58 inch plasma
BETWEEN pins, black on black highlighted, red on red highlighted on the buffer board connector.
3-4 jumper, take it off for now.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: samsung 58 inch plasma
-61v I get if like this ?Attached FilesComment
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Re: samsung 58 inch plasma
Yes, that's what I meant. Now, try with buffer connectors removed.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: samsung 58 inch plasma
-22.2vComment
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Re: samsung 58 inch plasma
That reading is unexpected, and very odd. Not sure what to make of it.
Please check the voltage across those red capacitors I highlighted previously.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: samsung 58 inch plasma
Just seen this on the back of a bufferAttached FilesComment
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Re: samsung 58 inch plasma
-110v of the red capComment
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Re: samsung 58 inch plasma
That's OK...
I think part of your Y-Main is defective, can you see any point for testing voltages at -Vscan/-Vsc or Vsch? I cannot see them on photos.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: samsung 58 inch plasma
yer at the top of the board vschComment
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Re: samsung 58 inch plasma
What do you measure on that point? Black probe on ground this time.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: samsung 58 inch plasma
vsch -31.2v vsacn -189.4vComment
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Re: samsung 58 inch plasma
Hmm, both VSCAN and VSCH are OK. I could not see those on pictures before, makes it much easier!
With those voltages you SHOULD have screen glow, even if it's really faint.
This leads to only a few possibilities:
- bad panel (cracked glass on outer edge or middle; check carefully)
- bad buffer board
- partially functional control board (unlikely)
You would need an oscilloscope to see if the Y-main waveforms are all correct. But so far, it appears Y-main is working.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: samsung 58 inch plasma
thats the first thing i checked was the glass its perfect how would i test buffersComment
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Re: samsung 58 inch plasma
You unfortunately need a scope to test the buffers. Also, the glass could be cracked under the frame, so you might want to try lifting that off to double check.
You could also try checking the voltage across the red caps on the X-main board to see if that's functioning properly, just in case.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: samsung 58 inch plasma
100.3v across the x main capsComment
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Re: samsung 58 inch plasma
Hmm, the X- and Y-main voltages should match very closely, but a small offset could be acceptable. There's not much else to suggest other than to replace boards one at a time, if you can't get hold of a scope to check the waveforms.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 58 inch plasma
ill ask in work tomorrow see what the engineers have or the design fella's ill keep u posted thanks for your help so far hope i can do this one i have plans for it
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Re: samsung 58 inch plasma
You work in an engineering firm? They probably have a scope you can borrow for the night (my boss has frequently allowed me to borrow meters when away from my lab) - and you could use that on the Samsung LED TV too, and check if main board sending right signals to panel.
Get a 10X probe too, if you can, and prefer a digital scope over analog, though both can be used.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 58 inch plasma
I work for a place called scott safety we do fire brigade and air force masks and breathing apparatus they have alsortsComment
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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, I have a Samsung UE50TU with:
- sound and backlight, but no picture
- when it arrived, it had a picture for a few seconds
- it keeps rebooting
- without ribbon cable between the two panel boards, it does not reboot but I have no picture
- without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
- when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.
- without cable between mainboard and lcd panel and with a jumpered... -
TV was working fine and then just shutdown one day. It will not turn back on. I get a backlight for a little while, then it just clicks and won't fully boot.
I took off the back panel and did the basic troubleshooting and it seems like it's a panel issue.
The backlight will stay on if I disconnect either of the ribbon cables going to the panel. I've watched this video (https://www.youtube.com/watch?v=77tymvTJDxo) and am wondering if this could be the issue, just a bad cap on the panel.
Any assistance is appreciated. -
This was my main TV for the last 6 years. I'm not inclined to throw out a $2600 TV so quickly so I'm trying to investigate the issue.
Problem
TV was disconnected from power for 6 months during construction. When I plugged it yesterday picture was fine, after 30 seconds it dimmed then started developing horizontal lines, picture then starts to ghost vertically until it degrades into vertical streaks. TV always displays a perfect picture when cold. I can unplug TV for 5 minutes and plug it back in and picture is restored for 20 seconds. I can also keep it in standby mode... -
Hello all,
This is my first post, but long term lurker on the form learning as much as possible about these TV's. I was given this TV as due to a power outage of constant On/off of power to TV. The TV originally would just click on and off (Typical Reboot Cycle). I opened the back of the TV, and troubleshooted by taking the 96 pin LVDS off one at a time to see if I had a picture on either side. I finally fixed the reboot cycle by finding the error on the left side of the screen off connector CN 1301, and the TV would stay on. Further troubleshooting led me to the driver boards where...
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