Grundig Vivance 32 LXW 82-6710 No Power

[rtstorm]

Hello, i have this TV that have no power. I find out that i do not have 5V STB (i have only 2.7V) all other output are 0V.

I see that someone replace caps 2 yrs ago. Can this be issue again? Caps look ok to me?

What else should i check?

[budm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

Hello, i have this TV that have no power. I find out that i do not have 5V STB (i have only 2.7V) all other output are 0V.

I see that someone replace caps 2 yrs ago. Can this be issue again? Caps look ok to me?

What else should i check?

2.7V output STBY without having other board connected?
What kind of caps were used for the replacement? General purpose type?
Were small caps C14, 15, 16 replaced?

[rtstorm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

I have 2.7 V with connected all board.
Replacement caps is SAMXON 1000uF 35V. 3 out of 5 were replaced. 2 old CapXon still on board.

No small C14, C15 and C16 were not replaced.

[rtstorm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

i test this caps with capacitance test on my multimeter and all caps are near writen value.
I do not have ESR meter, can it still be faulty and show good capacitance but bad internal resistance?

[budm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

I have 2.7 V with connected all board.
Replacement caps is SAMXON 1000uF 35V. 3 out of 5 were replaced. 2 old CapXon still on board.

No small C14, C15 and C16 were not replaced.

How about when it is not connected to other board?
C14~16 Startup/running caps can be the problem.

[rtstorm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

well i disconnect other board and now i have 12V on place where i have 2.7V before.

[budm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

well i disconnect other board and now i have 12V on place where i have 2.7V before.

That has to be measurement error. Are you using the correct GND pin of the connector?
I do not see any labels for the connector CN3 pins.

[rtstorm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

Pin 8,9,10 are GND on CN3. I double check it. When connected board voltage is 2.7V and when disconected i have 12V.

[rtstorm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

Hey i try tu heat area around caps with hairblower and voltage jump from 2.7V to 12V and TV start to working. Is this sign that caps are bad?

[budm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

Hey i try tu heat area around caps with hairblower and voltage jump from 2.7V to 12V and TV start to working. Is this sign that caps are bad?

Yes, when cap is heated up the ESR will go down so the circuit will function again.
I would change C14~16.

[rtstorm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

Ok will try to replace them. And i must get myself a ESR meter any recomendation?

[rtstorm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

i replace them and TV working. Thank you

[budm]

Re: Grundig Vivance 32 LXW 82-6710 No Power

Thanks for the follow-up.