Samsung UE46B6000VW

[StephenU]

Hi all looking for some help on the above set i'm trying to repair.

Tv powers on and has sound but no video or OSD, just a white glow from the backlight.

Had a look around >

Checked fuse on Tcon all fine here.
Checked all cables
Gave the PSU a good Visual.


Thanks in advance

s>

[ducky29]

Re: Samsung UE46B6000VW

Can you see a picture/ menus if you shine a flashlight at the screen?

[vinceroger69]

Re: Samsung UE46B6000VW

did you also check voltage too the tcon fuse?

[StephenU]

Re: Samsung UE46B6000VW

Backlights are on so don't think they are at fault here - ducky29

[StephenU]

Re: Samsung UE46B6000VW

did you also check voltage too the tcon fuse?

Didn't check it - D'oh

[Andrew F. Ali]

Re: Samsung UE46B6000VW

Vdd, Von, Voff, Vcom, Vgl and Vgh are voltages to start with.

[StephenU]

Re: Samsung UE46B6000VW

Vdd, Von, Voff, Vcom, Vgl and Vgh are voltages to start with.

I've had a look at the silkscreen on the board but can seem to see the TP's you are referring too.

[Andrew F. Ali]

Re: Samsung UE46B6000VW

Hmmm...I seem to not be able to find them too. They may be on the panel Bds that the FFCs go to. However, your problem is either T-CON or Panel. With my experience I would tend towards T-CON as these T-CON Bds. are noted for failure.

[Davi.p]

Re: Samsung UE46B6000VW

Hi, test theese points in Volt.

[StephenU]

Re: Samsung UE46B6000VW

Hi, test theese points in Volt.

Great thanks Davi.P will do it tonight.

[StephenU]

Re: Samsung UE46B6000VW

Hi, test theese points in Volt.

I have numbered up the test points and attached a pic here are the results I got.

1 - 3.31v
2 - 12.58v
3 - 1.12v
4 - 2.47v
5 - 1.816v
6 - 3.288v
7 - 1.064v
8 - 2.512v
9 - 12.67v
10 - 12.67v
11 - 12.67v
12 - 2.472v


TIA.

S.

[Davi.p]

Re: Samsung UE46B6000VW

It lacks of the Avdd signal, Check in diode mode across C_DP1 and its anode to ground. Check this point two again after disconnecting one at a time of the tcon output cables.

[StephenU]

Re: Samsung UE46B6000VW

It lacks of the Avdd signal, Check in diode mode across C_DP1 and its anode to ground. Check this point two again after disconnecting one at a time of the tcon output cables.

Thanks Davi.p, i will check these are let you know the results.

RE: with reference to "C_DP1 and its anode to ground" - Just the normal Black Probe on chassis ground and Red Probe to anode of Diode C_DP1?


S.

[Davi.p]

Re: Samsung UE46B6000VW

with reference to "C_DP1 and its anode to ground" - Just the normal Black Probe on chassis ground and Red Probe to anode of Diode C_DP1?

when in diode mode you have to check between the indicated points in one way and reverse..

[StephenU]

Re: Samsung UE46B6000VW

when in diode mode you have to check between the indicated points in one way and reverse..

Do I need to have the set powered on or take these measurements with set off?

[vinceroger69]

Re: Samsung UE46B6000VW

set powered off when testing in diode mode

[StephenU]

Re: Samsung UE46B6000VW

set powered off when testing in diode mode

Cheers vince, just going to post findings now.

So here's what I got -

TV off and both tcon outputs plugged in.

Red probe on Anode - Black on Cathode = 0.177v
Black probe Anode - Red Probe Cathode = O/C

BP Chassis RP Anode of C_DP1 = 1.43v
BP Chassis RP Cathode of C_DP1 = O/C

RP Chassis GND - RP Anode of C_DP1 = 0.54v
RP Chassis GND - BP Cathode of C_DP1 = 0.65v

RP Chassis GND BP (Test Point 2) = 0.65v - Same value measured with 1 tcon output ribbon at a time.

Hopefully I've took the readings correctly.

TIA All

S.

**************

(RP - Red Probe)
(BP - Black Probe)
(O/C - Open CCT)

[Davi.p]

Re: Samsung UE46B6000VW

Hopefully I’ve took the readings correctly.

Not all well, i told to test point 2 again in VOLT...
For the test on the DP1 anode to the GND it seems OK, maybe there is not a a signal to the near TPS65161 that enables AVDD. In the image under i have squared two test zones, one you can test if C_RP41 is connected to C_CP11 near it, then if you can test in volt RP21 and RP41 respect to GND.

[StephenU]

Re: Samsung UE46B6000VW

It lacks of the Avdd signal, Check in diode mode across C_DP1 and its anode to ground. Check this point two again after disconnecting one at a time of the tcon output cables.

“Check this point two again after disconnecting one at a time of the tcon output cables.”
Tv turned on to take this measurement?

Thanks

[Davi.p]

Re: Samsung UE46B6000VW

:-P ... As a hobbyist repairer you have to get some lessons... all voltage testing are made obviously with AC plug in and tv on.