Panasonic TX-P46GT30B

[crt man]

Hi all
I have a 8 blink problem with the above set I have found
a manual and the causes are.

Driver SOS3 Checkpoint SS-board.
(SS FPC DET)Checkpoint SS2-board
(SS Energy Recovery Circuit) Check point SS PFC
and SS2 PFC
I am not sure where I should be looking,
especially SS PFC and SS2 PFC.

Any help would be greatly appreciated.

Thanks
Alan.

[tw2005]

Re: Panasonic TX-P46GT30B

providing the SC is connected then 8 blink should be SS. SS PFC and SS2 PFC are the flex cables to the panel.

Maybe check Q102 on SS , RCJ330N25 on a hunch it may be shorted.

[crt man]

Re: Panasonic TX-P46GT30B

Hi
Q102 not shorted, I now have another SS board,
as I thought original had been burning,and there
was marks on the frame, but could not work out
why as the screws were tight.

Update now screen shows some life and Viera
banner comes on then as fans start to run it
shuts down with 8 blinks or sometimes LED
will stay on green but screen goes off, the only thing on the
SS2 board is a diode with two resistors.
The diode measures good, unless it is breaking down
when current is applied.

Alan.

[Alastair E]

Re: Panasonic TX-P46GT30B

Mainboard can also cause 8-blink faults....

[crt man]

Re: Panasonic TX-P46GT30B

Hi
That's what I thought but this is not mentioned
on the service manual,I hope to have a A
board delivered today,so here's hoping.

Alan

[Moreno83]

Re: Panasonic TX-P46GT30B

So did your mainboard fix the problem?

[crt man]

Re: Panasonic TX-P46GT30B

Has not arrived yet.(sigh)

Alan.

[Moreno83]

Re: Panasonic TX-P46GT30B

Ok im curious. Does your set also show some vertical lines/bars + distorted picture? Like a scart cable thats not seated correctly? It stays on for 1 or 2 seconds and then it shuts down.

Can you remove the small ribbon cable going from mainboard to the SS board and leave all other cables as is. Does the tv stay on?

[crt man]

Re: Panasonic TX-P46GT30B

Hi

Update A- board arrived yesterday, fitted no change.
( went to work )

While I was there I thought about my problem,
I decided to put 8 blinks to the back of my mind,
I then thought about what I did to fix the original
problem,7 blinks and decided to lift the SC board and see
if the there was any arcing on the mountings.
Well there was and I set about cleaning the frame
and board, I put it back together and turned on
no change,
I then turned my attention to my handy work of
replacing transistors Q 401-3 and Q421-3
whilst inspecting them I noticed Q401 and 3
was loose on the board slightly so I re-soldered
them and tried again.
Success turned on and now have a working TV.
I now have a spare SS board and A board.

[Moreno83]

Re: Panasonic TX-P46GT30B

Good job! Mine also worked after 8 blink error , tv thought something was wrong due to the weight of the tv giving a lot of pressure on the bottom side of the tv. Probably bending the boards or something.....

[crt man]

Re: Panasonic TX-P46GT30B

Well
This thing just died again watched TV then turned off,
about an hour later turned on and found no picture.
Then went off with 7 blinks,opened it up and found
Q622 and 661 short,anything else I should check
or have I just been unlucky.

Alan.

[crt man]

Re: Panasonic TX-P46GT30B

Q622 and 661 replaced and working again,
threw me at first, as it went into standby
on switch on,strange as it was switched off
doing 7 blinks.

Alan.

[tw2005]

Re: Panasonic TX-P46GT30B

Q622 and 661 replaced and working again,
threw me at first, as it went into standby
on switch on,strange as it was switched off
doing 7 blinks.

Alan.

yeah it's like a reset. will be interesting to see how it goes. how long has it been running for since last repair?

[crt man]

Re: Panasonic TX-P46GT30B

Done something like 60 hours give or take.
it was about 8 or 9 days.

Alan.