Tcon Test

style="display:block; text-align:center;"
data-ad-layout="in-article"
data-ad-format="fluid"
data-ad-client="ca-pub-1990720073119592"
data-ad-slot="1616473230">

Problem

Sony Bravia KDL 52S4100.

 When turn it on, it takes a long time to
warm up, 20-40 minutes. During this time, the screen is a very faint
blue. can see back lighting coming through the back of the screen.
Once the picture comes on, it has horizontal lines on the left hand side
for 10 minutes or so, then it is fine. Once warm, can shut it off,
and turn it back on with no issues. It comes right back on. During all
of this, the green LED power on light, stays lit.



Now, there is a Test I call the TCON wiggle test. You wiggle the
TCON's LVDS cable, and by rocking it, you generate noise on the TV
screen that you can see. If you SEE NOISE, you know your TCON is
working, and then we have LESS to test !!



It can verify if
your TCON is BLOCKING the picture until you shut it off and restart it
(tells me you have a digital data issue, if restarting it gives you a
picture) Here's a picture of the TCON WIGGLE TEST --







That's
a Samsung TV but ALL TV sets are the same. Sony just makes there TCON
look like a SONY TCON. Same place, same cables, connected to the SAME
boards.



Now...before you do the TCON TEST, Try the MENU test with the blue screen -- if it appears, your TCON is fine.



My
recommendation -- Remove the TV's rear cover first, put the TV back on
it's stand to hold it upright so you can see the TV screen. Turn it on,
when you have the Blue screen, check the MENU (last circuit on the TV's
main board before the signal goes to the TCON) and if that doesn't show
up, do the wiggle test to generate noise on the TV screen. You'll see
Flashes of light pop up on the screen and that tells you the noise is
being transferred thru the TCON !



Simple way to divide and Conquer video problems.



 

The TCON wiggle test tells me a LOT...if you got
flashing when wiggling, then your TCON is able to recieve NOISE and
transmit it to the TV screen !

That tells me the TCON is working, and it can only be the main video on the main board.



Love that TCON test....Sony trainer taught me that.



PART NUMBER -- 1-857-227-11

All Data sheet