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Jvc tv blows line transister,+smoke,replaced lopt.

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Posted on Feb 18, 2008

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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

Posted on Nov 02, 2007

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1 Answer

I purchased an old Realistic TRC-431 CB. When I turned it on it worked fine, the mic was keyed then the lights went dim and stayed dim. Now the lights remain dim. I checked the two output transistors...


The problem is with your power supply. There should be a big round transister on the power supply this is the power transister. It will be mounted to the power supply case. Replace this transister and try to operaste your radio again. Make sure that the power supply you use is at leat 7 amps or the radio will not operate properly and you will possibly blow the transister again.

Jul 16, 2011 | Radio Communications

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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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WE all hear that POP sound from time to time. I assume we are talking about a CRT, TV. That pop sound is most likely the OPT blowing. Output Transistor, for the LOPT. Line out[put Transformer.
One of the two need replacing.
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Apr 12, 2011 | Toymax Viore 42 in. Plasma TV

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Sony kd-34xbr2. Started having problems turning it on. Found manual. Found that when I hit power button, I can hear the components clicking, but i noticed there is no static on the display of crt, and...


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

29 inch TV model no.CS 722 AN. H. output tr blows off and stand by blinks


Sir 1- Use heavy ampier transister for hor output
2-measure h output transister base and emitter resestance value it is nearabout 15to33 ohms,you can use.
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Oct 03, 2010 | Samsung 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

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Replacement of LOPT on an LG TV


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.

Jan 31, 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

4 Answers

Tv dead


please check flyback transformer for short
good luck

Nov 01, 2007 | Televison & Video

1 Answer

No Picture


Rarely picture tube also shows the same symptom. High pitch sound is due to through deflection area LOT power supply is loaded. Compulsary horizontal output transister short. From your statement i think Lot puncture takes place. Change LOT and horizontal output transister and check tv is now working.

Aug 23, 2007 | Zenith A32B86R 32" TV

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