Author Topic: Panasonic TX-55AX630B  (Read 139 times)

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Turnip

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Panasonic TX-55AX630B
« on: December 06, 2018,11:55:48 »
Hi Folks,

Got a Panasonic TX-55AX630B with a curious picture. Seems other folks repaired a Led issue, but shortly afterwards, the RHS is  OK, The centre has a dark vertical band and the LHS takes seconds to catch up with the RHS picture.

Tend to suspect screen damage from previous repair as have duffed a few up myself, long in the past.

Admit don't fancy anything that big having short arms. Attach a picture - Chris.

Mulja tv repair portal

Panasonic TX-55AX630B
« on: December 06, 2018,11:55:48 »

downunder

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Re: Panasonic TX-55AX630B
« Reply #1 on: December 06, 2018,15:40:41 »

Hi Chris,

Looks to me that the panel may be edge lit down both sides and the LEDs on the left edge are out. What does your LED tester say?

Bruce

Turnip

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Re: Panasonic TX-55AX630B
« Reply #2 on: December 07, 2018,12:17:16 »
Hi Bruce,

Yes but. Noticed picture change really slow LHS which seems to indicate screen damage.

Chap in the shop saw the bill from another firm, where they stated they had sorted the backlight biz, but there was possibly another issue they couldn't sort.

Note the bill stated 88.00 for bits, but I noticed bleed though from a badly placed lens suggesting they didn't replace all the strips, or even any.

Could rule out edge lit issues. Don't know the total bill, but folks weren't too happy, still aren't - Chris.

Mulja tv repair portal

Re: Panasonic TX-55AX630B
« Reply #2 on: December 07, 2018,12:17:16 »

Davy

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Re: Panasonic TX-55AX630B
« Reply #3 on: December 07, 2018,20:55:54 »
Wonder if they fitted an LED or two.... with another of the incorrect voltage/current and there's a temperature brightness issue, maybe another LED is going duff.

The other day I scrapped a almost new 49" Samsung chap said, his daughters 'hubby' decided put it on the wall...... did a very nice job, two minutes later 'KER RASH' it fell on the floor and smashed the screen, you couldn't tell unless it was powered up. There were only a strip of LEDs at the top when I bisected the screen, I expected see a strip at the bottom as well.....

suppose if one of these led's went duff you'd get an identical fault, just a thought, hence the post.

Dave


Turnip

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Re: Panasonic TX-55AX630B
« Reply #4 on: December 08, 2018,11:52:15 »
Hi Davy,

Its a thought but every time I get a slow moving picture, its screen damage. Maybe a small nick in the glass or flexies pulled off the screen. Guess pretty easy to do with a 55 inch with normal arms.

Last time I had a 55 inch in for dubious backlight I suggested they take it somewhere else - Mind you, it was a UMC - China crap assembled in eastern europe by folks who normally come over and dig potatoes.

Guess vote remain as we need potatoes for chips - Chris.

Davy

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Re: Panasonic TX-55AX630B
« Reply #5 on: December 10, 2018,09:01:22 »

..... it was a UMC - China crap assembled in eastern europe by folks who normally come over and dig potatoes.

Guess vote remain as we need potatoes for chips - Chris.

Chips yak....  squishy squashy lard wrapped up in printers ink...... of course you did you meant chips made with spuds  :s_laugh:

Last week had a guy with a 49" SammySung almost brand new,  his daughters hubby put it on the wall,  two minutes later...... 'KER RASH' it fell off.  Looked OK apart from cracked trim you could only see screen was cracked when powered up - a big spiders web in bottom right corner.

'Scrap it the guy said', only two strips of LEDs at the top (2 x 58 or so) and non at the bottom, couldn't see how they were fixed to the aluminium plate.

Dave

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Re: Panasonic TX-55AX630B
« Reply #5 on: December 10, 2018,09:01:22 »

Turnip

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Re: Panasonic TX-55AX630B
« Reply #6 on: December 10, 2018,11:29:59 »
Hi Davy,

Have a 42 Pana where it flashes 1/1 indicating a backlight issue. Side lit with a bank of 60 Leds arranged in tens. Screen off where all Leds light so can't find the duff one.

Thought go Ebay China where the 6920L-0001C strip goes for half the price of a UK one. Getting the strip off is just a matter of heating the aluminium heat sink with a large iron (ancient Solon 150W) then peeling it off, inch at a time. Adhesive backing comes off with petrol as meths doesn't do the trick. New strips come with adhesive strip, but if you mend one, double sided tape does the biz.

As to Potatoes - Live in East Anglia where our brothers from Eastern Europe used to come across and sort our spuds as locals don't care get their hands dirty. Feel Brexit dubious in the extreme - Chris.

 

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