ps50c77hdx/xec

[Jimmy1979]

hello
i need help with my plasma tv it turns on for one minute and shuts down with flasing led 5 times. when the tv is running all voltages are good vs va etc..
even when i unplug y and x and low buffer board the power supply still shutsdown after 1 minute.
all help is welcome.

[ReeceyBurger123]

Re: ps50c77hdx/xec

Did you comment on my video ? Also we need images of the boards please mate.

[ReeceyBurger123]

Re: ps50c77hdx/xec

?

[Jimmy1979]

Re: ps50c77hdx/xec

Yes i think so. Here are some pictures of the powerboard etc..
Number of the power supply is bn44-00162a

Ps: i measured the big capacitor on the right the 250v 850uf an i got only 685uf
Do you think that is the problem i already ordered a new one.

[Jimmy1979]

Re: ps50c77hdx/xec

Picture 2

[Jimmy1979]

Re: ps50c77hdx/xec

Picture 3

[ReeceyBurger123]

Re: ps50c77hdx/xec

Checked for cold solder joints ?

[Jimmy1979]

Re: ps50c77hdx/xec

Picture 4

[Jimmy1979]

Re: ps50c77hdx/xec

Yes i did and resoldered a couple but the problem still remained.

[ReeceyBurger123]

Re: ps50c77hdx/xec

Ok, when it fails what does the Pson and Vs on signals do ?

[Jimmy1979]

Re: ps50c77hdx/xec

Ps-on i only get 0,3v and vs 3,2v

[Jimmy1979]

Re: ps50c77hdx/xec

Vs-on droppes to 0,0v

[ReeceyBurger123]

Re: ps50c77hdx/xec

Ok, wait for it to fail. Then heat the Psu with a hair drier, the small caps near the yellow one tend to go bad which causes intermittent standby. Heating them should make them work.

[Jimmy1979]

Re: ps50c77hdx/xec

I will do that tommorow and let you know.
Thanks for you help mate����

[ReeceyBurger123]

Re: ps50c77hdx/xec

Its ok buddy

[Jimmy1979]

Re: ps50c77hdx/xec

I have heated the psu where the small capacitor is near the yellow one and the tv won't start. I measured it with an esr meter and gives me 21uf and 2,0ohm( i think 2 ohm is bad for an 50v 22uf capacitor. I will replace it but i think that its not the problem.

[ReeceyBurger123]

Re: ps50c77hdx/xec

2ohm ? Thats bad for sure !

[Jimmy1979]

Re: ps50c77hdx/xec

I changed al the small capacitors and the problem still exists.

[Jimmy1979]

Re: ps50c77hdx/xec

Any other idea?

[ReeceyBurger123]

Re: ps50c77hdx/xec

Ok when it shuts down does Pson collapse ?