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Vertical ic overheat - LG Computers & Internet

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Check the jumpers well

Posted on Jul 17, 2013


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Whic is vertical driver ic and which is vertical processor ic in ny tv... Main ic LA76810 and vertical ic 78040... whic is processor and which is driver ic

LA 76810 is the processor-chroma- oscillator jungle & 78040 is the vertical IC. Refer its schematic for more details. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.

Feb 01, 2015 | Televison & Video

2 Answers

Ihave atv lg ultraslim 21 and it uses vertical ic no la78141 what abstract can it use instead of the original one?

You can try the other LA vertical IC that is same in scale (number of pins) and in size.

Jul 31, 2014 | Televison & Video

2 Answers

Toshiba, 36A50 picture is a thin white line. Can this be repaired?

Yes...this TV may be repaired. The line you describe is in the center and is horizontal across the TV. You will need to resolder the vertical IC pins. This vertical IC is mounted on a large heatsink. Under the board you will see there are 5 or 7 pins that will have rings around them. Resolder these. And you should replace two or three capacitors that are next to this IC. A bad cap will overheat an IC and separate the solder grounds. If you can find my expertise page on this website, you will see the repair in more detail. Thanks for asking and show a few hands of support.

Dec 12, 2010 | Toshiba 36A50 36" TV

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I have a mitsubishi vs-4541/4542 tv with sound and no picture. What are my options?

I have not repaired this particular model. If this TV is a projection set,you have one of two possible problems. First....You may have convergence IC that has lost a ground contact to the signal board. We are discussing the board that has all your RCA connections and RF connectors. You may have to replace, possibly a STK-XXX series convergence IC. One or two capacitors near this IC, usually a bad cap will end the life of an IC and resistors. And replace a couple of resistors, these are standing tall next to the convergence IC. The next problem could be on the power supply. The power supply will almost always have the flyback transformer on it. If you can locate the vertical IC..This IC may need resoldering. You will see rings around the pins of the vertical IC. Replace the three or four capacitors next to the IC. A bad capacitor will overheat an IC and cause solder grounds to separate. Thanks for asking and show a few hands of support!

Dec 09, 2010 | Mitsubishi Televison & Video

1 Answer

Red vertical touch screen adjustment is not moving

Most likely two convergence IC's bad (STK392-110).
Check for bad power resistors also connected to these IC's. I have more 25 years experience in repairing electronic products but replacing the IC's can be a pain, you need a good soldering tool, must remove a lot of circuit wiring and must take out the whole PCB. Must change both IC's at the same time not just one because it may fail in a short time. I have
a 42H83 at home and I have experience the same problem, this unit based on my observation does not have enough ventilation, if the air openings at the back is blocked like placing it very close to the wall the convergence IC's overheat and fail. What I did to my unit after I fixed it is I removed the front black plastic cover (take off several screws) and just leave the front black cloth cover on it. It provides awesome air circulation and it's been over three years now and the TV did not give me any problem at all.

After reparing you must do a complete horizontal and vertical alignment of the Red, Blue and Green guns to get a vivid picture by using the remote control.

Oct 25, 2009 | Toshiba 42H83 42" Rear Projection...

2 Answers

Please help

This is a problem with the vertical circuit and is usually a defective vertical IC. If you can solder, locate the vertical IC (small flat IC attached to a heat sink with about 9-11 pins). Try resoldering the pins on the IC. If that fails to resolve the problem, replace the IC. This IC will be marked LA7837 or something similar. Keep us posted. Dan

Jun 08, 2009 | Sanyo DS32224 TV

2 Answers

Toshiba CE35f15 TV

This is a vertical circuit problem that is either bad connections on the vertical IC or a defective IC. If you can solder, you can fix this yourself. Look for a small flat IC attached to a heatsink with about 9-11 pins. It may be marked LA7837 or something similar. Try resoldering the pins first. If that fails to resolve the problem, replace the IC. There may be defective caps in the circuit as well, but those don't usually cause complete vertical failure. If the picture does not return fully, update this and we'll continue on to the next step.


Sep 29, 2008 | Toshiba Televison & Video

3 Answers

Screen only showing single line of video in center.

hi there, is the single line horizontally or vertically? if horizontal line, you do have a vertical section problem, check some parts at vertical section, the vertical ic, the power source of vertical section ie diode & resistors. ty

Dec 26, 2007 | Zenith Z32X31D 32" TV

1 Answer

Vertical 1 line

Check voltage supply at vertical amp ic ,if present than change vertical amp ic.Some times supply line is dameged by faulty amp ic.therefore you have to rctify supply and replace ic.Check supply line fusible resistors.

Dec 13, 2007 | Televison & Video

2 Answers

Tv cuts off 10 seconds after switch on and destroying vertical output ic

If the main IC is not putting out a vertical drive signal then the vertical output will not do anything and therefore will not be damaged. What exactly do you mean by the set "literally eats deflection IC's"? What is the number on the vertical output IC? I will bet that your pump-up cap or pump-up diode is defective.

Jul 03, 2007 | Sharp 27K-S100 TV

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