Re: LG Flatron 42" Plasma
And with both in you get...?
And with both in you get...?
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Re: LG Flatron 42" Plasma
same problem, with lower only the screen only displays a bunch of multicoloured linesComment
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Re: LG Flatron 42" Plasma
That sounds about right. Your problem looks more like a control board fault unfortunately I'm not aware of how to test the control board on these panels. Verify -Vy and Vsc first though.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: LG Flatron 42" Plasma
if it is a control board fault would the heating up before failing possibly denote bad solder joins?Comment
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Re: LG Flatron 42" Plasma
On the control board processor itself quite possibly. Have you tried applying heat using a hairdryer?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: LG Flatron 42" Plasma
no i have not, would you advise that? i also tested the 15v, Va, and the 5v and they seem more or less in spec bar the 15v which is at 13.5vComment
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Re: LG Flatron 42" Plasma
I don't think the low 15V would cause the problem but it's worth investigating as that can be a sign of bad caps (which can cause other rails to be unstable e.g. 5V used by the digital processing portions.)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: LG Flatron 42" Plasma
the 5v is at 5.15 ish, the panel says 5.2, i'd say thats in spec but anyway... whats the easiest way to test caps as there really aren't many visual signs of bad capacitors on the board, that said i have to remove the control board to get to the rest of the stuff...Comment
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Re: LG Flatron 42" Plasma
The easiest way is to heat the power board and see if you get a significant rise in 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: LG Flatron 42" Plasma
ill give it a go, also, i noticed its been on for about 30 mins now without a fault (its just sitting there displaying the no signal thing)Comment
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Re: LG Flatron 42" Plasma
seems that when playing a movie the voltage drops across the +5v and +15v, have not tried Vs, 12v or 3.3v. thoughts? the 5v is at 4.3v and 15 at 13vComment
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Re: LG Flatron 42" Plasma
Definitely sounds like you may have a case of bad capacitors. Low 5V could cause your issue. Playing a movie uses more power than no signal display.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: LG Flatron 42" Plasma
ok so thats a lot easier than a damaged board
, so how would i go about testing caps, they all look fine... would pictures of the PSU board help?
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Re: LG Flatron 42" Plasma
Heat the caps with a hairdryer and observe the 5V and 15V.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: LG Flatron 42" Plasma
i did not observe voltages but this area on the PSU seems to be extremely sensitive to heat, i heated it for ~5 seconds and the symptoms appeared, blew cold air on it for about ten and they disappeared... just me or does that transformer have sony on it???Attached FilesLast edited by luke10050; 05-29-2013, 06:54 PM.Comment
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Re: LG Flatron 42" Plasma
so now ive determined the problem area, what should i do? i mean whats the easiest way to single out the capacitor...Comment
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Re: LG Flatron 42" Plasma
if i remove the caps, as they are probably 32v max, and test them with my meters built in capacitance thinggy, will the busted ones show a vastly lower capacitance?Comment
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Re: LG Flatron 42" Plasma
all those caps are rubycons bar the brown one which is a UCC LXZ cap... im thinking that might be the failed one...Comment
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Hi
,
My old LG Flatron recently started with coil beeping. This got worse every day for a few days until it also started having power problems.
Now it also went off again after displaying the LG logo, then on, off again, then on and so on...
So far I have measured the power supply unit, which delivers 19.21V and should therefore be OK. I removed the circuit board and connected it to the mains plug so that I could hear the coil beeping.
During the beeping, I pressed on the coils with a non-conductive tool to see if the sound changed and to find... -
I have a really weird problem, this motherboard was working normally, someday it just started and all fans were running but didn't want to post, tried resetting bios, checking CPU and it was getting warm tried external gpu, flashed bios with programmer, but same problem.
Next day after several attempts the board goes into protection mode, no more staying on, I turn on the PSU fans starts directly turning, it used to not start until I press the pwr button, now it starts directly and fans spins, and shuts off after 3 seconds sometimes less, then won't start again unless I unplug the PSU and... -
Hello everyone. I have been reading this forum for a long time - I really appreciate the amount of very interesting materials and information in the field of electronics.
I have a problem with this configuration:
ASUS PRIME B450M-A
RYZEN 1300X (I replaced it with ATHLON 200GE - the same behavior, the processors are functional, tested on another board)
When the entire set is installed (CPU, RAM, ATX connector and 12V 8 pin CPU plug), the board starts up for a while (about 1-2 seconds), the CPU fan starts and the board turns off immediately. When I disconnect... -
Hello,
I am having Samsung PS51E550 Plasma TV. While the TV was working, a crackling sound heard & video went off with audio still ON. After switching it off & ON, the red LED on TV blinks six times & then off.
Opened TV cover & observed foll
a) Green LED on the small PCB blinks at @5-6sec ON & off for 3-4 secs. Red LED on logic board ON
b)Vs & Va on power supply board raises momentarily to 209v & 58v resp & then drops.
c) Cold test on Y-main board shows all 3 pins of FGPF4536 IGBT short to Grnd.
How to confirm Y -Buffer board... -
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...
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