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Replacement of LOPT on an LG TV

How to replace a lopt on an LG TV. Three wires from the lopt connect to the crt socket. The socket is a molded type with no apparent way of diconnecting the three wires. I have a new lopt to replace the old one. I dont want to aatempt to open it by force incase the socket gets damaged.

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You will have to cut solder /splice the 3 wires Be sure to dress the splices after soldering with electrical tape. That's the only way if the CRT socket is sealed. Just don't mix up your wires, They should be color coded. Let me know if you need any additional help.

Posted on Jan 31, 2008

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The TV doesnt start and there is a constant noise of 'click'..'click'...'click'... going when ever we start the plug and switch of the TV.. i guess this could be due to moisture in...


This is the HT leak from the LOPT . You can remove the back panel after switch off and on switch on - in a dark condittion- will be able to see the sparks shorting. If so switch off and let the HT drain off. There will be high voltage on the CRT and so care must be taken not to touch the anode as HT might flow. Use a dry cloth to clean ,use petrol to clean all dirt and static dust, clean the LOPT.
clean the HT leads. Use some insulation if the leak is more specially from the transformer. If the clicks are still heard without switch on then it is internal leak within the LOPT and it must be replaced,

Jul 14, 2011 | Televison & Video

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Picture on screen has gone to only 1/4 of screen with strong line through picture.


This sounds like the OPT or LOPT has blown or weak ( OPT = Line output transistor. LOPT = Line output transformer.)
This job should only be carried out by a professional engineer. I would take it to your local TV repair person. Hope this helps.

Apr 13, 2011 | Sansui Televison & Video

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CAPACITORS Argh. the worst component in anything...LOL.. Right u sound like you know what u are doing.
I would suggest you change your LOPT, or even the lopt. LOPT = Line transformer . lopt = line transistor. usually a au808 If you do not understand this, u should not be in the back of this tv.

Apr 12, 2011 | Televison & Video

1 Answer

I plugged the wii into the socket and it showed a spark in the outlet and then I put in the video output and it didn't show anything, then I checked with another video cable and I plugged it to the tv ...


if one point hits the power before the other it will cause a strike that can burn out circuits in the unit frying them to the point of total shutdown this is called lopt striking. these components will need to be found and replaced by a servcie tech


there is no quick fix in regards to this problem sorry.


always remember no matter what your plugging into a wall socket always make sure the switch is turned to off first to stop lopt striking


merry christmas

Dec 22, 2010 | Nintendo Wii Console

1 Answer

I want a LOPT (Line output transformer) EF58149 for my 21 ?Onida color TV model number-8751, which was purchased in 1989. As per the Onida authorized service person, this modle LOPT is not available in...


Hello
The service person who told you so is correct. EF series LOTs are of old National Kit, and is not available now. If you have a chance to get it from somewhere, it will cost more that RS 800/= ie about $18, and with that money you can purchase a new kit for your TV, provided your TVs picture tube is good. Just do as you like in this case. Todays TV kits are assemled and aligned, comes with more than 250 channels and includes all accecories, like remote handet, fitting material and so on. OK.

Dec 10, 2010 | Televison & Video

1 Answer

Logic colour TV stuck in standby mode.


hi! try floating the b+ pin of the lopt and check if you have a normal b+ if it has. the lopt is the culprit.

Aug 11, 2009 | Televison & Video

1 Answer

Tv goes to standby


Yes require sodering iron lopt is the Line output transformer large cylindrical plastic item on circuit board that has a thick wire that connects to the CRT (tube) with cap on the end. Do Not Touch as 24

Oct 07, 2008 | Televison & Video

1 Answer

Error code thompson 32ws23u icc17 chassis


the unit is being over powered, by a faild component on the power board, i would suggest getting a new TV as replacong the LOPT does add up

Dec 09, 2007 | Televison & Video

2 Answers

Jvc tv


check for fly back transformer
but remember that before you replace any thing in eht section check for power supply output to be ok.
also check for diodes,capacitor connected to flyback transfomer.
also check for mica sheet is not cracked or h/output is not touching to chassis.
good luck

Nov 01, 2007 | Televison & Video

1 Answer

32" Sylvania SRT2232X


If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages. Generically speaking anything in the horiz deflection, hv development area will cause a no pix symptom, also a problem in the signal processor section, video river and output section as the crt/socket assembly. I would also check the lopt transistor and probably the fuseable resistors around the lopt.

Mar 23, 2006 | Sylvania 6413TC 13" TV

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