Hi someone called me with this TV, picture looks like contrast is turned way up similar to a Toshiba I had with wrong main board. Nothing has been worked on with this TV as of yet. Just curious if anyone has any experience with Sony's and this problem?
Sony KDL-37L4000
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Re: Sony KDL-37L4000
I reflowed the main board in the oven, cleaned the LVDS connections, and there was no change. Im thinking it is a bad main board, can a t-con cause this issue though?Last edited by kevinm34232; 03-03-2013, 11:16 AM. -
Re: Sony KDL-37L4000
OSD looks OK but still not right, it's just not as noticeable. The color is off. I tried a factory reset and got into the factory menu but nothing has helped.Comment
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Re: Sony KDL-37L4000
I'm thinking T-con personally though I wouldn't rule out the main 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: Sony KDL-37L4000
Hmm Tom remember the Toshiba I got hat had the wrong main board put in for a different model panel? This is very similar to what it looks like, that's why I was thinking main board.. The parts are expensive and pretty rare I guess Ill try to see if I can find both and try each one..Comment
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Re: Sony KDL-37L4000
Well I got new main board today but same problem. So I put old main board in and started looking at t-con (AUO 5537T03C02).
I froze the t-con board and plugged it in, and although most of the IC's defrosted pretty quickly, the one that went first was the one labeled AS15-U which closest datasheet I found was
https://cdn.badcaps-static.com/pdfs/...61ea6520a5.pdf
Tom I know you thought T-Con originally, I swear everytime I had an issue like this it turned out NOT to be T-Con and this time I decided to go with the main board, figures..
Should this chip heat up normally, or could this be the culprit, description being:
The EC5575 is a 14+1 channel voltage
buffers that buffers reference voltage for
gamma correction in a thin film transistor
liquid crystal display (TFT LCD). This
device incorporating a Vcom amplifier
circuits, four rail to rail buffer amplifier
circuits (the highest two stage and lowest
two stage) and 10 buffer amplifiers circuits.
The EC5575 is available in a space saving
48-pin TQFP package, and the operating
temperature is from –20°C to +85°C.
T-con is expensive and hard to locate..Comment
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Re: Sony KDL-37L4000
That is common failure on T-CON board with AS15 IC.
https://www.badcaps.net/forum/showth...mma#post304275
https://www.badcaps.net/forum/showth...099#post304099Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Sony KDL-37L4000
I saw that after searching that part # on here, thanks Bud. I ordered the part I will post back results..Comment
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Re: Sony KDL-37L4000
Replaced the AS15-U IC today and that WAS the problem, TV is working with good color. Thanks!Comment
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Re: Sony KDL-37L4000
Great!, thanks for posting the repair feedback update.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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