so I have found another one of these boards and even though my working board works in this TV this one produces no picture good backlight. The first thing that comes to mind is a dead as15 IC. Can this IC cause no image?
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Did I leave the soldering iron on? -
Re: sony tcon t400hw01 v3 no picture
I would see if it has voltage test points, VGMA Gamma test points, etc to see what you get. Fuse is good, right? Since you do have working board to do comparison test which will makes it a lot easier.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 -
Re: sony tcon t400hw01 v3 no picture
Yes fuse is good. Vgamma 1 starts at 14v. steadily declined as I go up And then vgamma 11 and 12 which are the last on the list show 0vDid I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
Are there any voltage test points on the board? I.E. 3V3. 1V8, etc.
Pictures of the board?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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Re: sony tcon t400hw01 v3 no picture
Nevermind
Vgamma1 14.8v
Vgamma2 1.8v
Vgamma3 10.0
Vgamma4 9.44
Vgamma5 9.361
Vgamma6 7.081
Vgamma7 6.096
Vgamma8 4.558
Vgamma9 4.188
Vgamma10 3.4
Vgamma11 2.2
Vgamma12 0.3
I might add that after two or three minutes of the TV being on it shuts down with a 12 blink CodeDid I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
looking for voltage test points nowDid I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
What's with vgamma 2 having a low voltage?
Also noticed it's fluctuating all over the place between 1.2 and 1.4v.Last edited by freakaftr8; 12-09-2014, 12:07 AM.Did I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
Here the board and but seem to be getting 1.8 2.5 3.3 12 volts and other various voltages but I have noticed that if you look at the picture the very lowest Coil there's nothing. It would be at the bottom of the board. Sorry the pictures are upside down
also I noticed if I leave one side the panel unplugged it turns white so obviously its getting voltage of some typeAttached FilesLast edited by freakaftr8; 12-09-2014, 12:09 AM.Did I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
Those 3 coils are for switching power supplies. There should be VGL (-), VGH (+) test points on the board some where which I do not remember what they should be.
You can look up the spec sheet for U201, 202, and 203 to see how they function.Last edited by budm; 12-09-2014, 12:15 AM.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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Re: sony tcon t400hw01 v3 no picture
Vgl1 is reading -5.999vdc
Vgh1 is reading 30.0vdcDid I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
Tom66 can tell you more as to what they should be.
According to this, your Voltage is about right:
https://cdn.badcaps-static.com/pdfs/...6c316493a3.pdfLast edited by budm; 12-09-2014, 12:37 AM.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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Re: sony tcon t400hw01 v3 no picture
BTW, what did you find as far as the voltage comparison readings between the two boards?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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Re: sony tcon t400hw01 v3 no picture
Hard to tell. This board is a different version that is interchangeable in this sony. I bought it off eBay cheap. there are two different boards that were supplied with this TV the one that you see now is the earlier of the two boards then there was a change in the model year and they supplied the other board and I'm having a problem with but I thought I'd give a go at this kind of board Since I'm waiting on my voltage regulators for the other t-con boardDid I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
So is vgamma 2 supposed to be low and bouncing around a few tenths of a volt?Did I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
Well looked all over the forums about gamma ics and it seems that when there's a dead spot in the readings it most certainly is bad. Just want to get a perspective before replacing it just in case there's a chance this is normal.
Just to recap. .
I have no picture just backlights on this tcon. Shuts down with error 12. Tv is fine. Works well with other tcon.
Tv model is kdl-46xbr6.Did I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
Well replaced AS15-F. Still no picture. Oddly all my gamma readings are now correct. Any ideas? Looks like voltages are all there except the coil on the very bottom.Did I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
does anyone have spec sheets on this board? I believe it's sending voltage to the panel because I can pull one ribbon cable off in the other side turns white unlike a completely dead t-con. So obviously the video signal is blanked outDid I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
You need to locate the spec sheets of those 3 ICs to see what they are and how they function.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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Re: sony tcon t400hw01 v3 no picture
Bud are you talking about u201 u202 and u203? (Seen in first picture in post number 8)Did I leave the soldering iron on?Comment
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Re: sony tcon t400hw01 v3 no picture
Here's what I got on the IC. Does it make sense to you? I understand is a bias supply voltage ic. Texas instrument Tps65161Attached FilesDid I leave the soldering iron on?Comment
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Hello everyone,
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The TV shows a black screen with no image.
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Later both ribbons were disconnected and TCON voltages were tested.
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Is this a TCON issue or something else ?...
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