Re: Samsung LE37A456C2D - image retention issue
Panel or t-con, main would not cause this, panel more likely.
Panel or t-con, main would not cause this, panel more likely.
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Re: Samsung LE37A456C2D - image retention issue
ok thanks tom - i will try a tcon as i cant try a panel lolComment
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Re: Samsung LE37A456C2D - image retention issue
a lil bit info from expeirence could be the side ribbons if it has them down the left and right of the panel they are little one inch ribbon tabs with little component on
you will have to remove the panel from the tv then the metal frame supports from the front of the panel
i find if i only remove the top and the sides screws the frame will tilt toward you enough to gain access this way also secures the lcd in the frame
drastic you may say but if it has them try pressuring it or slowly peel from panel watch picture if it improves remove whole tab
this has worked for me with a few samsung A modelsComment
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Re: Samsung LE37A456C2D - image retention issue
What??? Do NOT pull the tabs off!!! This kills the 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: Samsung LE37A456C2D - image retention issue
tom i did say was drastic but i have had sucess in past by removing the very top far right tab and tv still lives and beautifull picture mateComment
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Re: Samsung LE37A456C2D - image retention issue
Well, I would be extremely surprised if that didn't leave you with a dead panel. I suspect as this is a 720p AUO panel it uses only left or only right hand gate drivers anyway.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 LE37A456C2D - image retention issue
ok got the new tcon - bought as "tested"
so i have good news and bad news
good is the image retention does not happen anymore
now the problem is colour washed out like an xray sort of thing
iv read this is the gamma chip is that correct also how difficult is it to replace?Attached FilesComment
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Re: Samsung LE37A456C2D - image retention issue
Can you see any points marked VGAMA1 thru VGAMA22 or so? Test the voltage on each.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 LE37A456C2D - image retention issue
this is bad IR tcon so i take it that refers to the IC in the top left of the pic ?Attached FilesComment
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Re: Samsung LE37A456C2D - image retention issue
The group of test points marked VGAMA1, etc. You will have to find some of the missing ones (need to get all from VGAMA1 thru VGAMA22 or whatever it goes up to.)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 LE37A456C2D - image retention issue
there are 16 points there and only 14 on the lableComment
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Re: Samsung LE37A456C2D - image retention issue
There's a box around the gamma points. The other two are independent points for other signals.
You also need to find VGAMA3,4,5,9,18,19,20 which are going to be scattered elsewhere around the board.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 LE37A456C2D - image retention issue
update on this - gamma tested bad - got a new chip installed and tv works fine nowComment
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Re: Samsung LE37A456C2D - image retention issue
Hi All i have the same issue on the same tv
but the picture makes everyone look like Dale Winton or Des O'connor
Dark picture all over and has image retention swapped t-con and still the same
any ideas please
Regards
GaryComment
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TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
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Re: Samsung LE37A456C2D - image retention issue
will try thank you AlastairComment
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hi
having problem with samsung ua55es6800
tv had backlight on, sound working - responds to the remote control but no image.
check tcon board - had 12v in but no other voltages present.
when disconnected left ribbon cable - got back voltages and half image with lines and distorsion
when leaving only left side connected - again no voltages and no image.
put a tape on all (cd?! lines) on the left ribbon cable and got complete but distorted image (horizontal lines).
kept trying to block less pins on the left ribbon cable... -
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