i dont have model numbers for you but... i have this 42" LG Flatron that works fine, but after about 15 mins (when it gets hot i believe) it starts acting weirdly. the image starts going rainbow coloured (while still retaining the underlying image)(hinting that the Sync is all fine right???) then after that the entire image goes a deep red, then finally the screen goes black (while still doing that fuzzy thing that all plasma's do, with a bit of red). any ideas whats wrong at all? just looking for a general idea...
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Re: LG Flatron 42" Plasma
I'd post the model, pictures of the problem, pictures of the boards and the board numbers. Someone may recognise the symptoms better that way. -
Re: LG Flatron 42" Plasma
thanks for the advice, ill get to it tomorrow, its mostly assembled atm and its dark D:Comment
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Re: LG Flatron 42" Plasma
ok well this number is not 100% but an educated guess says its a LG RT-42PX10 42'' , same size same markings, same looking backplate and warning sticker and all... so it'd be a close match in the same series.Comment
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Re: LG Flatron 42" Plasma
The exact model is important; LG are well known for changing parts between their models and only adding e.g. a single "A" to indicate a revision.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
It is a R42PX11 AHYLKJComment
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Re: LG Flatron 42" Plasma
https://www.badcaps.net/forum/showthread.php?t=15937 <- found this, seems pretty similar to thisComment
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Re: LG Flatron 42" Plasma
so from what ive seen it could be the IPM failing due to a damaged PSU, so my logical assumption would be that i should start by acquiring an ESR meter and testing all the PSU caps correct? (and possibly other components) to ensure the fault will not replicate when i replace the IPM??? note: the tv is also emitting a loud staticy noise that i can confirm comes from both the PSU board and the Ysus and Zsus boards.Last edited by luke10050; 05-28-2013, 12:12 AM.Comment
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Re: LG Flatron 42" Plasma
The IPMs tend to fail on their own accord.
The PSU just needs to give good +180V (or Vs) and good 15V for the IPM to work, so if they are good, the PSU is probably good.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 i measured my Vs and it seems to be 183 volts... despite the panel saying 160v??? and i tried swapping the y-buffers, the lower buffer made it go all rainbow by itself, the upper normal. but the symptoms reappeared with the upper after 10 or so minutesComment
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Re: LG Flatron 42" Plasma
160V would be very low for this type of panel.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
sorry Vs is 190, god im blindComment
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Re: LG Flatron 42" Plasma
ok so its 189 now -_-Comment
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Re: LG Flatron 42" Plasma
I'd still expect a good image with Vs of 183V, though it may have a prominence of dead pixels. Not your rainbow effect.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
so you think its not related to the voltage, any ideas of the problems, all the detatchible fuses test out. Would pictures help?Comment
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Re: LG Flatron 42" Plasma
I am thinking ether -Vy bad, control board fault or main board fault. You can test -Vy on the Y-sus.
Picture of fault would help plus one of the chassis.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
heres some pics, i apologise for the akwardness of themAttached FilesComment
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Re: LG Flatron 42" Plasma
The bottom is always blank? Or have you removed something?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 bottom y buffer is removed, sitting on my kitchen tableComment
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Re: LG Flatron 42" Plasma
any ideas anyone?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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