Please for some help.
My plasma suddenly have grainy picture. Which board should I look first?
My plasma suddenly have grainy picture. Which board should I look first?
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Re: Plasma LG 50PT353 picture grainy
Are all your voltages Vs, Va, Vy, Vsc, Z-bias on the label correct? This looks like a bad Z-sus Bd. -
Re: Plasma LG 50PT353 picture grainy
Andrew F. Ali, yes the voltages are correct. I changed with another working PSU, and measured with Fluke, all OK. I will buy ZSUS and we will see.
Thanx for your help.Comment
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Re: Plasma LG 50PT353 picture grainy
Before you buy Z-sustain how did you check Vzbias voltage??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: Plasma LG 50PT353 picture grainy
Tom66, please look at the attachments. Is this correct VBias measurements?
What are you suggesting me? Thanx for your help.Attached FilesLast edited by bircaboy; 11-14-2018, 12:03 PM.Comment
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Re: Plasma LG 50PT353 picture grainy
Yes that is the Vzb 9Z-bias) test point.Comment
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Re: Plasma LG 50PT353 picture grainy
Should I adjust a little Vy,Vsc and Vzb?Comment
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Re: Plasma LG 50PT353 picture grainy
Were they within about 3 volts of the values on the sticker? If so, there is no need to adjust.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: Plasma LG 50PT353 picture grainy
Tom66, thanx for your answer. When the ZSUS board 'll come, I will report here.Comment
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Re: Plasma LG 50PT353 picture grainy
try to resolder big coil on Z-sus board....Comment
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Re: Plasma LG 50PT353 picture grainy
Today I changed Z-sus, and the result is the same.
Any other suggestion?Comment
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Re: Plasma LG 50PT353 picture grainy
did you find out what the promblem is?Comment
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Re: Plasma LG 50PT353 picture grainy
Nah, i think he sent that one to the landfill.Comment
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Picked up a bahemoth plasma TV not too long ago and just now getting around to looking at it.
No picture but you hear the TV static (white noise) playing loud and clear.
The back was already taken off (and no screws were provided) as the previous owner had already taken a look.
But it seems they didn't get too far and just left it.
When I first took a look I was amazed at how pristine the inside looked.
Its as if the TV had been in a time capsule.
Caps looked like they were just pulled off the self.
Copper coils had no sign of corrosion on... -
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 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)... -
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... -
hi i have a lg plasma tv that powers on fine and has a great picture and sound but after 15-30min parts of the picture start going grainy
if i split the tv screen up in 10 sections horizontally with 1 being bottom and 10 being top ...i would say the 2 groups of areas that go grainy are section 9 thru 10 and section 2 thru 5
but the odd thing is that both groups areas go grainy off and on...but both at the exact same time on and off
and when the image on the screen has a lighter background the grainy picture areas 9-10 and 2-5 goes away...
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