Question about JVC AV-27230 27" TV

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No verical checked ic 421 la7832 filter 100mf are ok but still no

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Hello gurdev, If all you have is a straight horizontal line across the middle of the screen, you have a vertical deflection problem. This may be caused by the opening of the vertical coupling capacitor, an open winding in the yoke transformer, the vertical drive transistor might be malfunctioning, or the vertical output IC chip might be defective. You will have to check all of these, make sure that you have a schematic, a multimeter, and an oscilloscope. Here is why: 1) schematic diagram to know where parts are and the voltages and signals present at test points. 2) multimeter to measure DC voltages on the pins of components 3) oscilloscope to measure signals at test points shown on the schematic. If you do not have a background in electronics please take your set to a repair shop, however if you have a background in electronics your troubleshooting will be around the vertical section if the tv. Thank you, Shuttle83

Posted on Oct 08, 2007


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Replace capacitors CX2105 (35 volts 220 Mf), CX2110(35 volts 100Mf), C2104 (50 volts 1 Mf), resolder resistors RX2115, RX2116,R2118,R2119. You will need to also resolder the vertical IC. I think this IC location is IC 2200, its been sometime since I repaired this one.Do not short the pins together with excess solder. The values on the cap may not be exact. Please use the cap value that is removed (remove and replace one at a time). The locations will be correct! This will remove the horizontal lines or bars across the TV screen. You may as well replace capacitors in the horizontal deflection area. By now you have bad caps there. The locations and values are, CX3218 (160 volts 2.2Mf), CX3205 (16 volts at 100 Mf) CX3413 (50 volts 22 Mf) and CX3416 (25 volts 100Mf). Thanks for asking and show all hands of support.

Jul 14, 2011 | Zenith B25A02Z TV

1 Answer

Hi. I have a 2004 TV, the Make is a Citizen 27 inches model JCTV2700. I have 5 to 7 white across the top. At the beginning (say 3 months ago) they wrer small. Now they are getting large and 2 more lines...

Neer the center of the mother board you should find a tall heatsink with an IC mounted to it. This is the vertical output IC. Change the electrolytic capacitor closest too the IC. On my set it is C406, I cannot read the value without removing it, but it will likely be 47Mf or 100Mf @50v.

Feb 26, 2011 | Televison & Video

1 Answer

I got the problem for my Panasonic 21 TV (CRT type) where's Vertical line across picture tube when the brighness adjust high. The vertical I.C already changing. Any solution > Thank you

Have you recently replaced its Line Output Transformer [LOT]?. If so have you replaced it with same type and number? Verical bars are due to LOT to Deflection Yoke mismatching. It is known as "Yoke Rigging" technically. Replacing the vertical Ic won't help in this problem . If you have replaced the LOT, the replaced one is not orginal. Ok

Oct 31, 2010 | Panasonic Televison & Video

1 Answer

The unit is only vertical line appearing in the screen,i check all the component around the vertical ic but no component defective

Tapping all around PCB for coldsolers?U resolder the vertical the IC and all the components around the IC?Still have the same reseult.Replacded the verical IC.

Sep 21, 2010 | Sanyo DS19310 19" TV

1 Answer

Cuales son los codigos para ajustar la imagen de

You have bad capacitors near the vertical IC. And you might have some one change the two horizontal caps as well. One is 250volts 2.2MF and the other is a 25volt 47MF. The caps near the vertical would include a 35 volt 100MF, two 50 volts 100MF, 50 volt .1MF, 16 volt 100MF and a 50 volt 10MF. If the fuse in your TV is will not have to change any semi conductors [ICs].

Feb 01, 2010 | Curtis-Mathis CM27101S TV

1 Answer

No Picture

It sounds like the veritcal ic has failed, and./or a cap in the verical circuit, When replacing the vertical ic, always check for a fuse resistor near the ic, it could be blowen aswell.

Sep 01, 2009 | Televison & Video

1 Answer

I have no vertical deflection how can i fix this?

Check the grounds around the 7 pin ic. [this is the vertical ic] located on a heat sink. Resolder these. The first reason they have rings is that you have two or three bad caps near this ic. Pay close attention to the 35volt 100mf cap in front of the ic. I cannot remember the location numbers now. Been sometime since I repaired this model. Then there are two 50volt 47mf that may be replaced. These are questionable, if you can find them they are very small but not surfacemounted. They are behind the ic. and you can replace . Always remember to correctly insert them with their polarity grounds.

Jul 12, 2009 | Sansui Televison & Video

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My 15 year old Toshiba Televisiononly shows a narrow horizontal band in the middle of the screen. Sound OK.

Hiii fairley,

You aren't specsificly dercribe yor tv set.
For common TV horizontal problem ;i.e : White line accross the horizontal screen, horizontal band,'s can solved by replacing the IC Vertical/Transistor, and olso to replace the cap nearest the IC.

For common TV Vertical Problem :i.e : White line at the center of the screen (top to bottom),Vertical band,etc...It's can cure by Replacing the Horizontal IC/Transistor,and offcurse the cap's.

Tha's what all I know....

Hope can help you to solved the problem.



Jun 22, 2009 | Toshiba 32A33 32" TV

1 Answer

Sony cmt-ex1 CD verical loader

If your two speakers are working,if ok ,then the problem is in power amp section ,the IC chip there is already defected .changed that IC so it works normal again and some reheating works in power amp.section...
rate me as FIXYA

Jul 03, 2008 | Sony CMT-EX1 CD Shelf System

1 Answer

Tv wont turn on

This is a general failure indicator and can be anything from a blown fuse to a bad power supply/vertical IC/lightning strike.

There are 2 fuses, check/replace both. if they blow again, check for physical damage to the vertical IC LA7832. If its cracked or had a hole in it , you are going to need to take it in for service.

May 18, 2008 | JVC AV-27720 27" TV

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