Samsung UE46B6000VW

[StephenU]

Re: Samsung UE46B6000VW

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.

RP41 connected to CP11 - connection Good

TP2 Voltage - with left ribbon unplugged - 12.59
TP2 Voltage - with right ribbon unplugged - 12.59

RP21 in Volts - -5.48v
RP41 in Vola - 0.019

[Davi.p]

Re: Samsung UE46B6000VW

Theese last test tells me more that AVDD booster is not switched on, for some reason, but not for a panel fault.
Check the voltage on PIN 9 and 26 of the UP1. IF PIN 9 is low like zero and same for pin 26 then check the capacitor on the pin 26.

[StephenU]

Re: Samsung UE46B6000VW

Theese last test tells me more that AVDD booster is not switched on, for some reason, but not for a panel fault.
Check the voltage on PIN 9 and 26 of the UP1. IF PIN 9 is low like zero and same for pin 26 then check the capacitor on the pin 26.

Thanks you Davi.p I will do this tomorrow and let you know my results. Much appreciate you help/guidance on this.


S.

[Davi.p]

Re: Samsung UE46B6000VW

The capacitor must be checked with a capacity meter or simply changed with one took from a board of same era and near same or little bigger volume.

[StephenU]

Re: Samsung UE46B6000VW

I have an LCR meter so will carefully remove and test at some point. Thanks

[StephenU]

Re: Samsung UE46B6000VW

Theese last test tells me more that AVDD booster is not switched on, for some reason, but not for a panel fault.
Check the voltage on PIN 9 and 26 of the UP1. IF PIN 9 is low like zero and same for pin 26 then check the capacitor on the pin 26.

Pin 9 - 0.019v
Pin 26 - 0.019v

I have a like for like known good tcon but I don't want to swap it incase this isn't the problem and it kills the good tcon.


Thanks

S.

[Davi.p]

Re: Samsung UE46B6000VW

I repeat: "IF PIN 9 is low like zero and same for pin 26 then check the capacitor on the pin 26", that is, desolder it and check its capacity. If it seems good change it anyway with one took from a unuseful board, same era, same or little bigger volume.

[StephenU]

Re: Samsung UE46B6000VW

I repeat: "IF PIN 9 is low like zero and same for pin 26 then check the capacitor on the pin 26", that is, desolder it and check its capacity. If it seems good change it anyway with one took from a unuseful board, same era, same or little bigger volume.

CALM DOWN - HAVE A SNICKERS 😉 👍🏼

Thanks Davi


S.

[budm]

Re: Samsung UE46B6000VW

Pin 9 - 0.019v
Pin 26 - 0.019v

I have a like for like known good tcon but I don’t want to swap it incase this isn’t the problem and it kills the good tcon.


Thanks

S.

Check the resistance between circuit GND and those two pins, no power to the board of course.

[StephenU]

Re: Samsung UE46B6000VW

Check the resistance between circuit GND and those two pins, no power to the board of course.

Will do Budm, will update results shortly.

Thanks.

S.

[StephenU]

Re: Samsung UE46B6000VW

Check the resistance between circuit GND and those two pins, no power to the board of course.

Budm would the cct GND be the one i've Put a green circle round or GND on the Tcon? Sorry for the stupid questions, thanks for your time.

S.

[StephenU]

Re: Samsung UE46B6000VW

Current Findings.

GND on tcon board (BP) - (RP) to pin 9 = O/C
GND on tcon board (RP) - (BP) to pin 9 = 589 ohms

GND on tcon board (BP) - (RP) to pin 26 = O/C
GND on tcon board (RP) - (BP) to pin 26 = 744 ohms


(BP) - Black Probe DMM
(RP) - Red Probe DMM

TIA All


S.

[StephenU]

Re: Samsung UE46B6000VW

deleted

[StephenU]

Re: Samsung UE46B6000VW

Check the resistance between circuit GND and those two pins, no power to the board of course.

Budm would the cct GND be the one i've Put a green circle round or GND on the Tcon? Sorry for the stupid questions, thanks for your time.

S.

Current Findings.

GND on tcon board (BP) - (RP) to pin 9 = O/C
GND on tcon board (RP) - (BP) to pin 9 = 589 ohms

GND on tcon board (BP) - (RP) to pin 26 = O/C
GND on tcon board (RP) - (BP) to pin 26 = 744 ohms


(BP) - Black Probe DMM
(RP) - Red Probe DMM

TIA All


S.

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

Hi Budm any these readings help or shall i just remove cap on pin 26 and measure as previously instructed by Davi.p and replace.

Thanks for your time.

S.

[StephenU]

Re: Samsung UE46B6000VW

Hi, test theese points in Volt.

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.

Thank you Davi.p and others for their input, TV now repaired and up and running Tcon was the issue here.

S.

[vinceroger69]

Re: Samsung UE46B6000VW

Thanks for the update glad a replacement tcon fixed the issue.