Hi guys, has anyone got any info on how this dvd unit actually works. Cut a long story short I bought it from Ebay Uk and it didnt work as it should, got a refund and guy let me keep the unit so it would be great to get it working as the build quality is out of this world , typical Japanese electronics.
The fault it this:-
Screen works and volume but thats it. Remote does nothing. I found a small micro switch has broken it seems to sense when the screen is in the closed position. All the unit says is "Screen position Error please press open button". The...
benfinland
Member
Last Activity: 08-07-2013, 01:27 PM
Joined: 07-15-2013
Location: Lappeenranta
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Jvc kw-avx700 dvd
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Re: Update Regarding LG Plasma 42pq3000
Good idea than having fans kicking in. Where is the best place to pick up a 12 volt feed? I will be able to work out current draw when I buy a fan to place an inline fuse holder between the source and the consumer. Yes I reckon its popped its clogs the old buffer board. I dont have the Fluke at home so will take back off tomorrow when I bring some tools home. Im gutted because I nearly purchased a Y Buffer board a month back but decided to just buy a second hand Y sus. I`ll open her up tomorrow. Cheers Tom. I really hope i can fix this permanently,... -
Re: Update Regarding LG Plasma 42pq3000
Hi Tom, well got a week out of it now its well n truly gone tits. Now there is sound but screen has vertical yellow,pink spatters and no picture. Any clue as to the issue? Could the buffer board for the YSus gone south? Ive not even had the back off yet but I know one thing I didnt get round to setting the Voltages before it actually went tits. I am looking at fixing it again with second hand stuff and once ive got it nailed I can buy new LG parts to ensure a long life. Im thinking if I get it working of wiring a fan up to a thermal switch...Leave a comment:
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Re: Update Regarding LG Plasma 42pq3000
Hi tom couldnt make it today. Can you give me some pointers as to what to check and i can bring the Fluke meter home from work tomorrow? I think that its either the second hand Ysus or the buffer board hopefully not the screen. I shall have a look . By the way do you know if a repair kit exists for the ysus board? id like to fix this board. To be honest I havent even checked the fuse on it because I was so consumed initially assuming the power supply was the fault. It was only then that I realised that the loss of the 17 volt and 5 volt feeds...Leave a comment:
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Re: Update Regarding LG Plasma 42pq3000
Cheers Tom I`ll try you at 5 but can check back later.Leave a comment:
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Re: Update Regarding LG Plasma 42pq3000
Superb That`s great Tom much appreciated. If your free tomorrow evening 4 pm or 5 pm your time I shall pop the back off.Leave a comment:
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Re: Update Regarding LG Plasma 42pq3000
It was a commercial break luckily, Lights off and the black bars are very black and rest of screen is lighter with a faint ghosting of the previous image which to be honest the tv always did that. So yes to confirm bars jet black more than watchable part of the screenLeave a comment:
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Re: Update Regarding LG Plasma 42pq3000
Hi Tom, I`ll have a look later on as the wife is watching without a trace and im a dead man if I dare interrupt it haha.Leave a comment:
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Re: Update Regarding LG Plasma 42pq3000
Heres a pic of the screen with top n bottom horizontal black lines
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Re: Update Regarding LG Plasma 42pq3000
Hi pal, thats what I thought do I opened the Y Sus buffer board connectors last night and removed the ribbons and reseated making sure they were straight all ok. I did push some of the Ysus connectors on the Y sus board now i have 1 black line 3 inched wide at the bottom as well as top. Its a £20 second hand board of Ebay same Rev number and part number. I`ll take a pic and upload it. Its perfectly watchable lol but id like to fix it its a good telly. Got some great black contrast now since i adjusted it So would hope to make perfect.Leave a comment:
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Re: Update Regarding LG Plasma 42pq3000
One issue is that there is a 4 inch black horizontal line across the top of the screen now. TV picture is good just this line. I will bring my fluke meter from work tomorrow and adjust the voltages correctly according to the label info in the tv . But do you think the panel might have gone tits?Leave a comment:
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Update Regarding LG Plasma 42pq3000
Thanks for all the help on here especially to Tom who has been helpful. My issue was the tv would click but not start. Having read stories of repair kits for power supplies I thoroughly tested the power supply board. No bulging caps or any burnt smells. Both large 22 OHM resistors ok, all diodes passing the diode test the only thing I didnt test any caps or transistors.
I found when measuring voltages on the power supply to the Y sustain board the 2 17 volt supplies and 1 5 volt supply were reading zero unless I unplugged the Y sus board where they appeared then as normal. There... -
Re: I need help LG 42pq3000
yes I thought so as of it was shorted this could be why my voltage dissapears.Leave a comment:
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Re: LG 42PC3RA SMPS power_ysus problems on/off/on click and fixes
What are these optocouplers? And where? I was wondering about bridging them to see if the tv will fire upLeave a comment:
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Re: I need help LG 42pq3000
Anyone? I guess I shall order a couple of boards as board tech is way beyond my skill level. I will let you now how i get onLeave a comment:
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Re: I need help LG 42pq3000
ive tried to get my head round the schematics lol, but cars are so easy compared to this stuff, I really want to understand how it all works but im confused so far.Leave a comment:
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Re: I need help LG 42pq3000
Hi Tom, yes if I measure the VA and VS at the power supply board I have the correct voltages across the 4 pins that is written on the inside of the television chassis on the label.
BUT only if I disconnect the harness connector from the Y SUS as soon as I power off the TV and then reconnect the Y SUS , power back on the voltage disappears again as does the 17 volts across 2 pins of the 24 pin micro connector on the bottom right of the power board, the one that goes to the av board.Leave a comment:
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I need help LG 42pq3000
6 months ago, (I know long time lol, been busy) I was living in lapland northern Finland and one night I forgot to unplug the tv from the mains. There was a lot of lightning that night and one of my friends tv`s failed also. It may be related as the tv was fine for 4 years before this occured.
The morning after I switched on and noticed a loud noise a bit like the old dial up modems coming from the back of the tv. I watched it for 2 hours then switched off now it doesnt come back on. The red stand by light is evident then when you switch the power switch the lamp turns blue but tv...Last edited by benfinland; 07-15-2013, 11:02 AM. -
Re: New Members - please post your introductions here
Also I dont fancy throwing this LG plasma out as its a nice tv when it works. I really cant stand wasting things but I dont like throwing parts at things either. Im an auto electrician / mechanic so can use a multimeter but my knmowledge of plasmas is limited to say the least.Leave a comment:
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Re: New Members - please post your introductions here
Im Ben and i have a broken plasma, im a bit annoyed as its only 4 years old and to be honest its never been much good. I live in Finland and I need my tv working as im on a crt piece of crap and its sucksLeave a comment:
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