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Equipment Repairs => LCD TV forum => Topic started by: call me al on October 12, 2014,09:29:09
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Hi All Have this samsung le40a616a3f picture is bright on left of screen and dark on right changed tcon but fault is still same. any help appreciated
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hi
try linking faulty tv to another thro scart and see if pic ok on other tv
if so sounds like screen faulty
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Hi Sparky & Al,
As far as I know Samsungs do not have AV OUT, certainly not in Oz. May be different there.
These have Test Patterns, though. Al will have to access the service menu and look through the options for the pattern generator. If the patterns show same result, I'd have to concur with Sparky that the panel is cactus. Bruce
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This sounds like a problem with the screen itself
this is a common fault with Samsung screens,
The tabs on the top of the screen give a lot of trouble
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@ leonard085
I seem recall reading somewhere that the tabs, the interconnections to the actual LCD screen could create strange faults like this and in some cases easily cured by compressing them using sticky backed foam, never had this problem myself yet.
Obviously if this is the case then it's either this or a new screen..... these day's ya' just gotta go of the model of the screen..... usually under all the 'ally'. Go off the model of the telly and sure can bet you are fitting the wrong screen.
Edit:
You can check this by watching the effects by applying pressure to them.
Dave
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Hi Davy,
Always have a go - Got some rolls of carpet under foam from the local tip, but only success to date was with a couple of LG/Philips LC320WXN - all others have been failures.
Admit did a different one, and was OK 'till the next day where the screen cracked from one corner as I hadn't got it in quite right - was peeved - Chris.
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I have done a few tab repairs on both Samsung and Lg Screens,
more often the tab repair don't work
when it does work, I have not had it back for repair, I always tell customer that this is a last resort, and if it fails, to let me know
But we have to at least give it a go, before we put a new screen in or scrap the tv
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Hi Turnip, think I know how you feel...!
In my early day's at the Coop - that was after they delivered bread and milk on a horse cart, an engineer loaded a Thorn 1500 into his van, "HOY, Tommy I shouted", brooom.... he was off as though at Brands Hatch, the telly comes flying out in middle of the road bits and pieces all over the darn show! He hadn't shut the door properly... he spent half a morning tracing a faulty capacitor in one of the I.F cans, telly and van were a fair distance apart when he stopped!
I now know what a sick parrot looks like!
Then there was this apprentice, had one of these 1500 in bedroom and fitted an headphone socket, the wire draped over the dropper resistor, one night sizzle, sizzle KABANG and he had his headphones on.
Back on topic.
I'm wondering if condensation sets in on the contacts, I've had this in 455Khz Toko ceramic filters in Ham rigs when they allowed DC on the contacts because of lack of 10nF isolating caps, it causes electromigration, green as heck inside they were!
Dave
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Hi Davy,
It's a thought - Wasn't the 1400 the one where the coax from the tuner shorted out and the set burned up ?
Guess you're a youngster as entered the trade where the Ferguson 747 was the biz. They sent a 10 inch 78 to fire us up to sell -
Even then we were dubious as we were told that the 747 was Hi-Fi, and the designers were 'freaked' with such quality - We had doubts, as the set was total crap, as much Thorn stuff usually was.
Recall - Visionhire (firm I was with) bought thousands of Thorn IV19s. They were an 'improved' 1400s with FM sound - Still caught fire, and the FM was crap.
Remember we hid most in a cellar 'til the 1500 came out, then disposed of them quietly - 1500s were almost decent with they modern transistors in the signal stages - Chris.
On topic - Never noticed condensation problems, but wonder about some Sammies where the screen feed is at the bottom - There again, if tube heat dislodges the flexy chips - might be an advantage.
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Dunno about 1400 catching fire, I thought it was Philips or B&O telly's that caught fire.
Dave
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Hi Davy,
You're a youngster,
Philips and B&O have had their problems, but none fire up like an old Thorn - Chris.
PS - Recall a Bush CTV25 burned the shop to a crisp, before they used the 'Davy Lamp' netting.
Fortunately passing at the time, and wife did coffee for the fire fighters.
Gather, a year later Bush used transistors and a tripler - Neat.
By then with 'Rediffusion'
Became independent, as they couldn't handle my private jobs - One needs to earn.
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Well, aren't we getting all nostalgic?
But Davy's young apprentice with the burning headphones was lucky. My pal Dave (former workmate, we are both gentlemen of leisure these days) had a very good friend (before me of course), who, just like me, he used to visit once a week as a ritual. This chap had been Baird who had an early valve colour set, the design of which he was involved. (I can't remember which model right now, but I was once asked to look at one of these dual standard monsters. The BIGGEST set of its era I ever saw.)
Anyway, well into his retirement, he started playing with one of these brain wave/music machines. He built a box with it all inside, including his own mains powered power supply. When my pal arrived, he found him dead, having suffered electrocution because of a failure of the transformer's isolation.
By coincidence, Dave has found two other dead bodies over the years, and I sometimes worry I may be next.
Les.
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Hi Les, only the older folks,
Remember my dad assembling a 'Viewmaster' in the late 50s with genuine 'Blue Prints'
He couldn't afford the tube though, and sadly expired in '61 from the Burma railway biz.
Was handed down his Henley Solon 60w iron plus his Pifco radiometer (was moving iron so ran down an HT battery just checking it)
Still have the soldering iron, and use it freeing up grease in the steering joints on my classic motor so I can squirt in some more.
Suspect sets that used a mains transformer for the EHT were the most deadly, even if only 5Kv - Chris.
PS - Recall, way back in the early 70s, used to light my fags from the EHT output of a Ferguson 3000 jelly pot LOPT when working bench tech for Rediffusion.
Made the mistake of trying to re-light one after lunch, was naturally a bit damp - but seem to have survived the ECT episode - a bit.
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Everybody is getting nostalgic . Remember doing my apprenticship at Radio Rentals and having to do screen cleans then having to take Sobell and GEC 2018 tuners apart to clean the slider .Also remember when you first saw somebody put the spark from an EY67 to chassis and seeing the big blue spark . Worst was when somebody handed you a charged 400volt capacitor for the first time