Panasonic TX-L55WTW60

[nbdy]

Hi,

Have a problem with this TV ...

The fuse was broken,so I replaced it,but it has blown again ...

Don't know where to start checking ...

The power supply is tnpa5817

thx for advices

greets

Darko

[diif]

Re: Panasonic TX-L55WTW60

Decent photos always help. Fuses don't tend to blow without a reason, start with checking the main components on the hot side of the power supply for shorts.

[nbdy]

Re: Panasonic TX-L55WTW60

https://www.dropbox.com/s/kdclm7b2wg...70510.jpg?dl=0

https://www.dropbox.com/s/wzdtxpcqo0...70522.jpg?dl=0

https://www.dropbox.com/s/dzxflb7thp...70530.jpg?dl=0

https://www.dropbox.com/s/u51rtdjvnn...70537.jpg?dl=0

Here some pics,see the upper right corner,the blown fuse ...

[dick_barton]

Re: Panasonic TX-L55WTW60

It's better if you could post your pictures on this site using the "Go Advanced".

[budm]

Re: Panasonic TX-L55WTW60

it's better if you could post your pictures on this site using the "go advanced".

+1

[nbdy]

Re: Panasonic TX-L55WTW60

[dick_barton]

Re: Panasonic TX-L55WTW60

That is quite a severe short with the fuse going black.
Check Q7201, Q7203, Q7301 & Q7302 and bridge rectifier D7102 and diode D7215

[nbdy]

Re: Panasonic TX-L55WTW60

THX

After checking with multimeter the Q7301 and Q7302 are not showing the right values between surce and drain ...

But a question,what is their mark,i can't see it on them,and on the shematic there is no value for Q7301 or Q7302 (the PDF doc)

STB13NM60N - maybe ????

[dick_barton]

Re: Panasonic TX-L55WTW60

Use a magnifier and shine a light on them at an angle to see if you can read what is written on them.

[nbdy]

Re: Panasonic TX-L55WTW60

Tryed,but last numbers/letters are missing ...

Just se the 13NMxx0N the xx is missing

[dick_barton]

Re: Panasonic TX-L55WTW60

They could be STB13NM60N as you suggested earlier

[nbdy]

Re: Panasonic TX-L55WTW60

Thx all for help ...

The parts came on friday,today I put them on the power board,and the tv works ...

again thx all ...

greets

[dick_barton]

Re: Panasonic TX-L55WTW60

Thanks for the follow up on the successful repair.

[nbdy]

Re: Panasonic TX-L55WTW60

Hi, trouble again ...

The TV worked for 15-20 days ...

Same TV ...

Now the 2 resistors R7201,R7202 are blowing in the air ... the fuse remains OK

Any advice ???