lg ps3000
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Re: lg ps3000
Well if he just gave you the board I doubt there's much you can argue. Can't you fit a board yourself? It takes maybe 10 minutes maximum. They are rare failures on this particular model, I believePlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: lg ps3000
is it bottom 2 pins on top buffer that r ground to test what ic has goneComment
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Re: lg ps3000
As here:
use P114 as your reference ground (Y-SUS VFG OUT.)
http://www.youtube.com/watch?v=51SZsfH60EYPlease 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 ps3000
Did you pull the heatsinks off?
Pg 67 on has pinout and measurement results.Attached FilesComment
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Re: lg ps3000
When you say a "buffer" has gone, please indicate exactly what you mean. Do you mean you get 3 beeps? Around one IC or multiple ICs? It's quite likely only one is bad.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: lg ps3000
ok so i put lead on pin ref p144 any pin then run other lead down side where panel ribbons plug in and i get long beep on bottom of p101 then top and bottom of p102 hope you get what i mean my meter only has beep on its own or diode on its onComment
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Re: lg ps3000
OK yep so that's first IC from bottom on the top buffer blown.
Any chance you have your old board? If so, test it too.
If you find the same IC to be blown there's a chance the panel is killing it or a ribbon is touching frame, so I would check these first. For panel, look at it carefully with torch. You are looking for any pixels that, when off, look a little burnt or black vs the normal dark grey.
If it's a different IC then it cannot be the panel, just a random board failure or worn out IC from previously cracked 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 ps3000
OK yep so that's first IC from bottom on the top buffer blown.
Any chance you have your old board? If so, test it too.
If you find the same IC to be blown there's a chance the panel is killing it or a ribbon is touching frame, so I would check these first. For panel, look at it carefully with torch. You are looking for any pixels that, when off, look a little burnt or black vs the normal dark grey.
If it's a different IC then it cannot be the panel, just a random board failure or worn out IC from previously cracked panel.Comment
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Re: lg ps3000
It seems unlikely, if you get -Vy and Vsc with bottom one installed. possible but unlikely.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 ps3000
When you get a beep, make sure to hold the reading there and check again to check it is not an erroneous reading.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 ps3000
i still think its cos he sent me boards from cracked screencan i can ysus with both buffers out of the tv ?
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Re: lg ps3000
You won't get anything on the panel with both buffers removed.
It's really weird for many chips to fail at once suddenly, which is why I doubt your readings.
I'd expect one IC maybe two at most if they are nearby to each other.
It's possible Y-sus has issue killing the buffer ICs but I'm not aware of any such issue on these.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 ps3000
You won't get anything on the panel with both buffers removed.
It's really weird for many chips to fail at once suddenly, which is why I doubt your readings.
I'd expect one IC maybe two at most if they are nearby to each other.
It's possible Y-sus has issue killing the buffer ICs but I'm not aware of any such issue on these.Comment
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Re: lg ps3000
They are essentially the same as the one I did in that video.
One of the essential things is your meter must have a very fast beep response. If you see in my video I can basically run it along the faulty connections and it beeps instantly. If your meter does not do that, you will need to slow down your testing.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 ps3000
Can you post a picture of the underside of the board? Need to see what lines IC #2 drives.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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