Panasonic TX-L37V10B possible mura or shadow or dark areas

[statalite]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

It's a LOT of work to take apart a large LCD like this (anything around 40" or bigger is "large" in my mind.)

You're dealing with a piece of LCD glass about 1.5mm thick and 37" diagonal. It is attached to the electronics via delicate bonded tab drivers. If you crack the panel or break a bond, game over. You need a couple hours free ideally, because you want to work nice and slow. No awards given for doing it fast and screwing it up.

I wouldn't recommend it unless you've done it before or can afford to break a panel accidentally. I still hate doing them even after doing it about 5 times. On my third panel I was assembling I was 1mm off on the glass alignment and plastic. I pushed down on the metal frame and cracked the panel. Ruined a nice 40" Sony panel right there. It's something I would NOT recommend a newbie try.

Following this advice, I have been put right off. bammbammfran made it look easy to do on his smaller monitor, but I am a newbie at this.

For bammbammfran here is a photo of the back, I had to take the cover off again which took an hour to take on and off.

I wonder if a panasonic service centre will touch it, possibly at significant cost I would imagine?

[bammbammfran]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

HI
Panasonic won't touch these or they will tell you what apple does " these can not be fixed "
But I did 3 27" apples last week alone, so they are full of shit !!!

I open 30 inchers all the time, so 7 " more diagonally is not that much larger
and can be handled with one set of hands

It looks like yours as an upper tcon board like the 24" in my video does, so the top ribbons are about the same setup.

Instead of you bulb plugs being on just one side like on my 24
yours looks like it has one on the left bottom and right bottom

otherwise it should be basically the same setup.

leds are basically the same as these ccfl ones, but their bulbs are at the very bottom and on bigger screens, at the top too. but the large plastic piece in the middle bottom layer of those is thicker.
video of an apple led is here
http://youtu.be/orJ-zEdSAAQ

I have a 40" here that I may open and do a video of tomorrow if I can find the time.

[statalite]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

Still dubious, but always curious. Looking forward to your video of the 40" bammbammfran.

[aaronwt6]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

It's a LOT of work to take apart a large LCD like this (anything around 40" or bigger is "large" in my mind.)

You're dealing with a piece of LCD glass about 1.5mm thick and 37" diagonal. It is attached to the electronics via delicate bonded tab drivers. If you crack the panel or break a bond, game over. You need a couple hours free ideally, because you want to work nice and slow. No awards given for doing it fast and screwing it up.

I wouldn't recommend it unless you've done it before or can afford to break a panel accidentally. I still hate doing them even after doing it about 5 times. On my third panel I was assembling I was 1mm off on the glass alignment and plastic. I pushed down on the metal frame and cracked the panel. Ruined a nice 40" Sony panel right there. It's something I would NOT recommend a newbie try.

Off topic but I just broke my 1st on Friday evening. 46" Toshiba with Samsung panel. Tab bond issue that was easily fixed but cracked the panel when tightening the first screw. Screen misalignment. Was pretty heartbreaking when I heard the pop.

[bammbammfran]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

Still dubious, but always curious. Looking forward to your video of the 40" bammbammfran.

Ok
Actually the one I just did ended up being a 46" with an already broken screen from falling off of a wall, so it was getting recycled.
it was actually easier to disassemble than the 27 apple
Will upload that video later tonight

[bammbammfran]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

Off topic but I just broke my 1st on Friday evening. 46" Toshiba with Samsung panel. Tab bond issue that was easily fixed but cracked the panel when tightening the first screw. Screen misalignment. Was pretty heartbreaking when I heard the pop.

This is why you need to take your time and make sure everything is sitting freely and where it belongs first

next time you do one for tab bonds which does not require the glass to be lifted, tape the glass to the plastic sides in a few places away from the tabs so that it doesn't lift accidentally out of the channel

Sorry about your mishap.

[bammbammfran]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

Cinematography is not great since I forgot how big this was and I was out of camera frame in a few places but this should give you an idea

http://youtu.be/dF_KVGMOwNo

[statalite]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

should the air temprature of a room or direct sunlight be a consideration when taking a tv apart?
when removing bits of "tape" do these all have to be replaced when putting back together?

[bammbammfran]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

Most of the tape is not necessary (especially like when apple went overboard on theirs)
Tape tends to stop airflow and trap heat which isn't usually a good thing.
I actually think that the lcd panels should have venting to let heat escape the panel.
If you feel like replacing it, look for some HVAC foil tape
Duck brand has one that is inexpensive, 3m also makes some but that is probably more costly, I use one made by venture tape.
temperature and or lighting is not a factor.
Dust is the biggest issue. it won't hurt anything but it can cause cosmetic spots in the panel
either will be white if below the films or dark if near the top.
So pick a clean area with enough space to lay out at least two panel sizes
IF you space is not really clean, you can get some cheap painters plastic dropcloths and fence off an area.
these are usually really thin plastic and when unrolled or unfold, they get some static properties, so they can help to grab floating dust.
A good thing to lay the screen and films on is paper. (Xmas wrapping paper should work well)

[statalite]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

Just looking at the image I uploaded with the back off.
I'm thinking I would not know where to start with the next part to take apart or unscrew, any ideas guys?
Is there a method/ logical way to disassemble?
I prob wont start for at least a week as I need to get the equipment.

[stj]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

most panels are held in the steel pcb frame with screws from the sides.

[bammbammfran]

Re: Panasonic TX-L37V10B possible mura or shadow or dark areas

Before you do anything, take a few more pictures and get some tape for marking parts and making botes and some different color markers to make different size screws.
Pictures as you do a step or two will also help you retrace your way back together

It looks like the first thing you will need to do is remove the front plastic trim
this is probably held with screws at the perimeter. the speaker and power button and remote sensor may go along with it, so you'll have to unplug those wires.

Then is looks like you will have to remove the covers in the two large red circles to access two boards connections that lead to the panel itself- Be gentle on the flat ribbons under the cover at the red arrow !!

After those are unplugged from the lcd panel, then start taking out any screw that looks like it is holding the large rear tin piece. I think your other boards will come along with this large piece.