Panasonic TC-P50GT30 screen washed out

[tw2005]

Re: Panasonic TC-P50GT30 screen washed out

Keep in mind 8 blink can also be

Open or loose connection between connectors C10/C20 Open or loose connection between A20 and SC20.

Under what conditions did the 8 blink occur? If you shut it down and turn it on again does it come back on or go straight to 8 blink? Does it go 8 blink after a set amount of time?

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

i turned it on again hours later yesterday and it powered up without SOS, i left it on for 10 min.
Can you recall any other instances of the washed out snowy screen screen, could it be the panel (oh no)

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

is this panel shot?

[tw2005]

Re: Panasonic TC-P50GT30 screen washed out

is this panel shot?

No, I don't this so. It's board related just not sure which but going to be SC or SS. I'm thinking SC, and Tom seems to like SS, you've ordered one so wait and see

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

Hi again,
I did put in another SS, I actually had already bought one (forgot). I have so many boards coming and going between the 3 TV's.
And it was the same result. I have a kit for the SC that I will try next. I will have that on Monday, and hopefully that will make a difference.
Thanks and enjoy the weekend, the weather is finally starting to get nice here for spring, and I imagine starting to go the other way for you guys.

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

i got my SC back from Moduslink, but no luck, I
also tried both SS cards, one seemed brighter, but this pic shows what I have.
I am coming to grips with dealing with another bad screen.

[nicholas1110]

Re: Panasonic TC-P50GT30 screen washed out

Hi,

Have you made sure that the sc board is the correct revision for this tv. I have seen this before where someone installed the wrong sc board and caused a very similar picture quality. Make sure the sc board is the correct version for the panel. Hope this helps

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

hmmm good suggestion,
i will double check, but the card i had repaired was the card originally in the TV. But maybe t is the wrong suffix, i will check

[nicholas1110]

Re: Panasonic TC-P50GT30 screen washed out

It's possible if you got the tv in non working condition, that the previous owner had replaced the sc board in hopes to resolve the 7 blink code but purchased the incorrect part.

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

It's possible if you got the tv in non working condition, that the previous owner had replaced the sc board in hopes to resolve the 7 blink code but purchased the incorrect part.

BINGO! there is still hope
i have a TNPA5335BK TXNSC1NVUUB which I sent to moduslink and have available in good working order as far as I know, with warranty.
Probably as you said, previous owner tried to repair or have repaired.

I should have for this model:
TNPA5335AJ TXNSC1NWUU

I will see if I can find one....

Thanks nicholas1110!

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

I have looked at the block diagram for both the p50 and p55 (SC board in hand)
at first glance the difference is VHIZ GEN (IC16792, IC 16973)
next I will see if I can determine if any other available boards have this VHIZ cct that i can take the components off and add to my board
looks like thre is no p50VT30, and the P50ST30 is a diff card,
Is there a better way to view the schematic to determine the chips in the cct?
looks like I can see the component numbers on the board, and can look them up on the service manual, yay. I
I will see if they are available, then decide if i want to tackle it.
see pics:

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

i think the only other difference as far as i can tell between tnpa5335AJ(P50GT30) and tnpa5335BK(P55GT30) is the following components that need to be added to the BK
resistors
16797
16798
16799
16919
16818
16819
16820
IC16792
IC16791
C16797
D16792
D16795

Q16921
Q16922
R16920
R16923
R16924

all are available.
Am I correct to assume that if these parts are the only differences between the two schematics, then it should work, or are there other issues that I am unaware of.
The other choice is to wait until the AJ board is available
thanks
dave

[tw2005]

Re: Panasonic TC-P50GT30 screen washed out

R16797
16798
16799
16919
16818
16819
16820

ic16792 NJM2406F(TE1)
ic16791 I don't see this. maybe you mean 793, MM1431CURE

c16797

d16792
d16795 I would go MA2J111, 1SS352 or equivalent. The OEM is Toshiba, older boards used panasonic

q16921 2SK3018T106 (2N7002 will work , larger but can fit)
q16922

r16920
r16923
r16924

you will most likely find these parts on other panasonic SC and SS. SC board should have all those.( discretes)

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

R16797
16798
16799
16919
16818
16819
16820

ic16792 NJM2406F(TE1)
ic16791 I don't see this. maybe you mean 793, MM1431CURE

c16797

d16792
d16795 I would go MA2J111, 1SS352 or equivalent. The OEM is Toshiba, older boards used panasonic

q16921 2SK3018T106 (2N7002 will work , larger but can fit)
q16922

r16920
r16923
r16924

you will most likely find these parts on other panasonic SC and SS. SC board should have all those.( discretes)

thanks tw my bad, should be ic16793
between encompass and partsimple.com I was able to find all of the parts
do you think it would work i checked the schematics for the SC pretty closely and compared the two.

[tw2005]

Re: Panasonic TC-P50GT30 screen washed out

thanks tw my bad, should be ic16793
between encompass and partsimple.com I was able to find all of the parts
do you think it would work i checked the schematics for the SC pretty closely and compared the two.

theorectically it should if that cct is made up. Are you getting all parts OEM? sounds expensive.

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

using a combination of those 2 suppliers, it's about $18 before shipping, so if i get double what I need it's $48 total.
My other choice is to sell the board I have and wait for the correct board to be available.
That could also cost me $30-$50.
I can't be positive that a proper SC card will solve my problem, but I want to try.
And since all the solder pads are ready and waiting, it could be fun mounting the 17 parts.
Am I crazy?

[tw2005]

Re: Panasonic TC-P50GT30 screen washed out

using a combination of those 2 suppliers, it's about $18 before shipping, so if i get double what I need it's $48 total.
My other choice is to sell the board I have and wait for the correct board to be available.
That could also cost me $30-$50.
I can't be positive that a proper SC card will solve my problem, but I want to try.
And since all the solder pads are ready and waiting, it could be fun mounting the 17 parts.
Am I crazy?

it's interesting. i don't see many options, a board may never surface so worth a shot but I'd copy and paste all the parts side by side in excel and do 1005 comparison on the Sc. just in case other parts need to be deleted plus there maybe some diferences in the caps and coils since this is for a 55" and you're getting back to a 50'.

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

that is a great idea!
that would never have occurred to me
is there anyway to separate out the SC parts?

[djw43]

Re: Panasonic TC-P50GT30 screen washed out

moduslink just called me, they have an AJ for me and they will swap it for the BK board!
Thank you Stormi Reynold!! (at Moduslink)

[tw2005]

Re: Panasonic TC-P50GT30 screen washed out

moduslink just called me, they have an AJ for me and they will swap it for the BK board!
Thank you Stormi Reynold!! (at Moduslink)

Good deal. yes, i get the feeling Modus have a good business ethic. Sent them an email some time ago and found they were very respectful and corrected some errors i found on their web, also adjusted some prices down I questioned.