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?
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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.
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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..
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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..
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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=24809
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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=24809
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