Hisense 58A6KV

[Helikvar]

With D13 removed the pads are still reading shorted .D12 reads shorted as well.D13 reads infinity in both directions perhaps I overheated it removing it .
. Strange thing is both the anode and cathode seem to be connected to the ground on both diodes which makes no sense.
There doesn't seem to be separate tracks for each only the common ground.Pics are included to show this .

[Helikvar]

So it is soldered on both sides to ground... Plays the role of a limiter, a height support...

Yes it is soldered to ground on both sides.Ok meaningless other than as a support.

[Helikvar]

D22 anode to cathode .233v leads reversed infinit
D16 anode to cathode .228v leads reversed infinit
D20 anode to cathode .228v leads reversed 2.69v
D18 anode to cathode .249v leads reversed 1.43v
D15 anode to cathode. 233v leads reversed infinit
Q3 drain to source .581v leads reversed infinit
Q4 drain to source .580v leads reversed 1.99v
Q5 drain to source 2.44v leads reversed .454v
Q3,Q4 p-CHANNEL mosfet
Q5 n-channel mosfet
T4 npn transistor checks ok
VGHF 28.1v
VGL_GOA -10.25v
VSS1 -8v
VIN 12.06v
R_VAA 15.28v

[Diah]

this measurements above in circuit or out side the circuit ?

[Helikvar]

In circuit

[Davi.p]

Please, read my sticky thread about photos, i'm unable to download them..

[Helikvar]

Please, read my sticky thread about photos, i'm unable to download them..

Ok I've reduced one photo down to 2000 by 2000.Let me know if that is satisfactory and also any other photos you want me to reduce or retake at the requested resolution

[Davi.p]

on the post #23 all measures correct.. i don't know why before i could watch the separated tcon pic. now i don't, if you can reduce it..

[Helikvar]

Is this the one you are referring to ?.I've reduced it .

[Davi.p]

this Hisense separated tcon + integrated tcon is creepy.. the measures of the post #5 , where are taken? i was meaning the separate tcon, but them are doubled also on the integrated tcon (shame on Hisense) and must be measured also there, i need also a broader view of the integrated tcon 'cause i need to find the HVAA circuit and also the rest..

[Helikvar]

Sorry the last pic was cut off on the ends I resized it to see entire tcon board.

[Helikvar]

The measurements on post 5 were taken from the tcon board which attaches to the mainboard/power supply..All other measurements taken from the integrated control board attached directly to the panel.
. The HVAA voltage reading is the same on both boards and the one causing the problem as it reads low at 3.3v as you pointed out.

[Davi.p]

do you have to do the Captcha verify code each post? because is i do and is very annoying..

have you checked every 0 ohm resistor?

is c221 between HVAA testpoint and GND? (panel tcon, let's call tcon 2).
anyway i suspect that cap, if you can, replace it.. By the colour / size it seems low capacity, maybe 1-2 uF

[Helikvar]

Yes captcha eveytime and I agree very annoying.Checked all 0 ohm resistors and all read 0 ohm .Yes C221 is between HVAA test point and ground .It reads infinity when multimeter is on ohms .You think I should replace it even though it doesn't show its shorted.?
. Now to do another @#$$%# captcha.

[Davi.p]

yes i think that getting another cap from an used board instead of throwing the entire tv it deserves a lilttle effort.. caps can short maybe under certain temperature.. i do not see a separate ps for HVAA voltage, so in many sets it is obtained by a capacitor voltage divider, i do not see the other one..

[Helikvar]

Changed C221 and voltage on HVAA still drops down to 3.34v from 7.99v when powered on with remote after a few seconds.

[Davi.p]

Can you tell me the voltage of each term. of those resistor / caps respect to GND? I feel strange that HVAA is created by I5 on TCON 2 and returns to TCON 1 (see test points)...

[Diah]

disconnect the LVDS from T-CON. and apply 12V to T-CON F1 turn on if BL didn't light up use torch light to explorer the screen RGB Test, if u get it go head to replace the MB

[Helikvar]

disconnect the LVDS from T-CON. and apply 12V to T-CON F1 turn on if BL didn't light up use torch light to explorer the screen RGB Test, if u get it go head to replace the MB

I already tried the 12v injection from main board to tcon board and rgb test begins but screen goes dark as soon as the HVAA voltage drops from 7.99v down to 3.34 v .I only see about 2 colors mostly yellow on entire screen but it quickly fades away .The backlights also come on and stay on.

[Helikvar]

Can you tell me the voltage of each term. of those resistor / caps respect to GND? I feel strange that HVAA is created by I5 on TCON 2 and returns to TCON 1 (see test points)...

values are in this text file