Have a samsung LN32a300 with a dark smeared over tinted picture, don't believe its backlit related. Anybody seen this on a LCD set or have any ideas ??
ln32a300 dark picture
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Re: ln32a300 dark picture
That is bad GAMMA Voltage reference issue on the T-CON board, more likely the GAMMA IC P/N AS15 or AS19.
Please up load the good clear pictures of the T-CON board, there should be GAMMA Voltage test points on that T-CON 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=24809 -
Re: ln32a300 dark picture
https://www.badcaps.net/forum/attach...5&d=1522204903
IC on the bottom left, what is the P/N as printed on top, AS15?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: ln32a300 dark picture
AS15-G, that is common failure on T-CON board, there are many many threads about this IC.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: ln32a300 dark picture
You can verify the VGMA Voltages first if you want, I cannot see the test points in your pictures.
Ah, your pictures came back up!
https://www.badcaps.net/forum/attach...1&d=1522205818
I see GM1 ~ GM14 for the GAMMA Voltage test points.Last edited by budm; 03-27-2018, 09:45 PM.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: ln32a300 dark picture
TCON voltages with no video input are
GM1 = 13.05
GM2 = 10.43
GM3 = 9.69
GM4 = 9.05
GM5 = 8.6
GM6 = 7.49
GM7 = 7.1
GM8 = 6.66
GM9 = 6.21
GM10 = 5.05
GM11 = 4.7
GM12 = 5.06
GM13 = 3.03
GM14 = 5.2
Vref = 13.3, VCM = 5.88, VDA = 13.74, SDA = 3.3Comment
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Re: ln32a300 dark picture
Bad #12 and #14. See the pattern?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
-
Re: ln32a300 dark picture
Thanks for the follow-up.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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