Re: LG 50PQ6000 unstable 5v standby
On a side note I do need to get myself a little component kit togeather.
On a side note I do need to get myself a little component kit togeather.
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Repaired: LG50PQ6000 -
Re: LG 50PQ6000 unstable 5v standby
Pick up another TV with bad caps?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 50PQ6000 unstable 5v standby
What and strip it?Repaired: LG50PQ6000Comment
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Re: LG 50PQ6000 unstable 5v standby
No... fix it!!!
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 50PQ6000 unstable 5v standby
will have a look about.
Repaired: LG50PQ6000Comment
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Re: LG 50PQ6000 unstable 5v standby
Thanks for your help guys Zener replaced and came to life.
Repaired: LG50PQ6000Comment
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Re: LG 50PQ6000 unstable 5v standby
Not a zener. A real diode. Glad you fixed it!
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 50PQ6000 unstable 5v standby
Well it's worked for 4 weeks with some light use and then got home from the staff party at work for the Mrs to moan at me saying that TV I Fixed is rubbish. Haven't had the back off again just yet but simulated symptoms as before with the diode. Broken again!Repaired: LG50PQ6000Comment
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Re: LG 50PQ6000 unstable 5v standby
Yeah, looks like the 150V diode might not have been good enough, would need to source a 200V one, but seems damn near impossible!
You can try UF5402~UF5407 but they are only fast recovery... not schottky.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 50PQ6000 unstable 5v standby
I think it already has one but it could be bulked up.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 50PQ6000 unstable 5v standby
Hi Tom
Well I thought I did well and got one of these (link below)
Would something else in the tv be pulling too much current, maybe on its way out and cause it to blow do you think?
http://www.chsinteractive.co.uk/elec...de-general.htmRepaired: LG50PQ6000Comment
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Re: LG 50PQ6000 unstable 5v standby
Found a source, nice. That should last as long as the original did. Maybe three years or so. I think it's a design flaw for it to not use a proper heatsink. Clearly the part runs much too hot. When installing it, try maximising the lead length. Longer leads will lead to greater heat dissipation capability.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 50PQ6000 unstable 5v standby
In not so sure about fitting the 2nd one unless I under stand a bit more why the first replacement blew.Repaired: LG50PQ6000Comment
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Re: LG 50PQ6000 unstable 5v standby
As tom said, it may be too much heat. There are diodes that you can buy which are meant for inverters, they are like 600v, 3A schottkies. I don't know if they have a lower forward voltage drop, but they DO come in better cases (TO-220 for example) which will dissipate the heat better.Muh-soggy-kneeComment
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Re: LG 50PQ6000 unstable 5v standby
[QUOTE=ben7;294390]As tom said, it may be too much heat. There are diodes that you can buy which are meant for inverters, they are like 600v, 3A schottkies. I don't know if they have a lower forward voltage drop, but they DO come in better cases (TO-220 for example)
So I need to find a better schottkie with simular characteristics?Repaired: LG50PQ6000Comment
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Re: LG 50PQ6000 unstable 5v standby
You can't fit a TO-220 in that position though, as it's designed for a DO-201 which is an axial package, not designed for mounting to a heatsink. You are stuck with LG's poor design...
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Hi. I got a Vizio with no power or standby, and won't turn on with remote or button. I checked the voltages on the connector and all read 0.00V or nearly 0(0.050 ON/OFF pin). None of the pins are labeled STB for standby although I do see some 5V pins. Other than the obvious standby led, which isn't coming on, is there a way to check for standby voltage on this PS. I'm trying to see if my problem is the PS or mainboard. Some Vizios I have fixed with no standby led me to think it was the PS but it turned out being the mainboard. Any experience with this set would be greatly appreciated. -
Hi all.
I started a thread while back regarding TV power supply standby circuitry as it is something I am not quite on top of.
SMPS theory and function is becoming more familiar, however the standby part is still a bit of a mystery.
Anyway, a friend has this TV with the above mentioned power supply board which has no standby voltage, nor any other voltages leaving the board.
The mains AC comes in fine, gets filtered and rectified with power is on the main filter cap as well as the transformer and drain pins of the ICE3B0665J, but that's it.
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Hello forum. I've recently been given a Yamaha TSX 120 DAB radio and ipod dock. Its working well however when put on standby its using 6.3 watts. The manual states less than 1 watt on standby. I measured this with a plug in monitor which seems accurate with other items. In use it uses around 7.5 watts. Firstly has anyone who owns a similar radio also got a plug in monitor to check if this is normal with this unit? In the first half a second the monitor shows 0.3 watts which I suspect is what it should use but something is switching it to be almost fully powered. I've searched the manual for eco...03-01-2024, 07:25 AM -
Hello,
I am trying to re-purpose this power supply that I saved years ago from a tv with a cracked screen for a monitor but that is not really that relevent at the moment. I do not recall which tv but a google search looks like it is from Wharfedale LTF37K1.
You may notice I made some alterations moving some components to the top and some wires which are from a 5v regulator I fitted to the 12v output as the monitor requires 5v. The standby was already at fault from the beginning, it has nothing to do with the alterations...
Years ago it had some bulging caps... -
Hello everyone,
I got a Samsung The Frame 55 inch TV for free from uncle cause it is not turning on anymore. I am in the second year of training as an electrician so I have knowledge already but I am far away from to be a pro.
The TV has Standby but ist not turning on. A Friend of mine owns a 50 inch Frame TV so I checked the One Connect Box and the One Connect Cable there. Both are good and working normally. I have opened the TV case and measured some voltages on the Board.
What I already found is that the 12.8V are not an the connector to the main board connector to the power...
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