Panasonic Viera TX-L32C2E

[Antti]

Hello!

Big difficulties to troubleshoot this tv!

Sometimes powers on ok, I can watch tv as much as i want to, but sometimes it wont start, just nothing else but the stand by light.

Capasitors looks fine, changed the bad ones. Is this a psu problem or what?
I cannot find any burn components.

[Antti]

Re: Panasonic Viera TX-L32C2E

i tested when the power goes out, its when i put the antenna plug in and try to watch tv trough its own dvb-t....

couple of clics and the tv shuts off and it wont turn on anymore, i have to wait about 2hr

[kasfamily]

Re: Panasonic Viera TX-L32C2E

how many times led blinks

[Antti]

Re: Panasonic Viera TX-L32C2E

how many times led blinks

it blinks very fast, cannot really count
then comes steady green.

I tried now and it didnt start...
the "blinking" is green not red light...

[Antti]

Re: Panasonic Viera TX-L32C2E

anyone?

[budm]

Re: Panasonic Viera TX-L32C2E

We need better pictures of the board, both sides. You need to verify that the standby voltage is not fluctuating. I cannot tell from the pictures as to which pin on the white connector is for the STANDBY Voltage.

[Antti]

Re: Panasonic Viera TX-L32C2E

This board is weird because i cannot find the voltages that should come from the white connector pins...


Is this normal for panasonic? or am i just failing :O

[budm]

Re: Panasonic Viera TX-L32C2E

That is why I need good clear pictures of both side of the board to trace out the connections.

[Antti]

Re: Panasonic Viera TX-L32C2E

pictures bothsides of the powerboard

[budm]

Re: Panasonic Viera TX-L32C2E

Need picture in the red box area, brighter too, I cannot easily see the traces.

[Antti]

Re: Panasonic Viera TX-L32C2E

any better?

[budm]

Re: Panasonic Viera TX-L32C2E

OK, connector P2 pin 1 and 2 are tied together and connected to the white wire and red wire, and also connected to the filter cap C601 (+ pin), that is the standby power supply. So you need to find out if it is putting out steady DC using chassis as the ground ref for the meter.

[Antti]

Re: Panasonic Viera TX-L32C2E

I measured the white and the red wire next to it, both gave me steady 5.77, seems ok?

[budm]

Re: Panasonic Viera TX-L32C2E

So it is not going up and down in sync with the LED then, right? If that is the case, the STBY power supply is OK and the problem is in the main board some where. I cannot find the service manual yet to see if there is any LED error codes.

[Antti]

Re: Panasonic Viera TX-L32C2E

no, the power is steady. Green blinking is so fast that nobody cant count them


here is some pictures from mainboard, when i plug the antenna it shuts off and wont turn on..


and the antenna "socket" seems little burned?

[Antti]

Re: Panasonic Viera TX-L32C2E

Ok, i´ve pretty much troubleshooted the problem to the antenna/dvb.... what next?
should i check fuses? or change the whole antenna plug?

tv started normally, but when i plug the antenna, it shuts down and goes somekind of safe mode :o

[budm]

Re: Panasonic Viera TX-L32C2E

Without the diagram of the main board I cannot help out much. May be look to see if there are fuses on the main board, check the input/output of the voltage regulators, etc.

[kasfamily]

Re: Panasonic Viera TX-L32C2E

Use "Galvanic Isolator" for the antenna http://www.dipolnet.com/galvanic_iso...hz__R48605.htm