Question about JVC AV-27230 27" TV

1 Answer

Tv image horiziontal lines on top of screen, sometimes picture looks reflected from the top of screen in those horizontal lines

Posted by on

  • 1 more comment 
  • stwilky2 Nov 05, 2007

    I have a toshiba CF3272b with the same problem(lines and what seems to be a reflection). I am not electronicly challanged ( I fixed the convergence board on my other toshiba) can I look for burn outs on the board. the equipment you advised is hard to get ahold of. I can get a fluke but thats about it. Do you know where I can get free scmatics for this tv??

  • Anonymous Dec 16, 2007

    Have same problom jvc tv thought there might be a simple adjustment. If there is no longer an adjustment then guess not thanks for the info.

  • Irishbull May 08, 2008

    My JVC TV recently began getting a batch of thin white/clear horizontal lines at the top 1/5 of the screen. The bottom-most line is more solid white and its length varies by constantly moving (a busy side-to-side blinking...). Months ago, I noticed a slight rainbow-colored patch in the top left corner of the screen. Eventually, it went away. When this batch of lines appeared, it would only be when I first turned the TV on. After a few minutes the line would disappear. I made sure I moved everything that could produce electrical static interference away from the TV. No improvement... It's always been plugged into a surge protector. I paid $219 for it apprx.8 years ago. Not looking to pay almost triple for a new LCD/HD/Flatscreen TV. However equally not sure if I can learn how to open it up and do surgery. Don't most repair shops charge 200 deposit anyway? What does it normally cost to fix my problem?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,139 Answers

Hello bouloulou, Well let me tell you what you have is a loss of Vertical Linearity. This could be cause by a power supply issue or by inproper filtering of the dc voltage used to supply the vertical section of the TV. There used to be a control which allowed you to adjust this along with Vertical Size which controled the bottom of the screen. These days the signal processor chip takes care of this along with a few capacitors. I woould suggest that if you do not have a background in electronics that you take the set to a shop for repairs, If you do have a background in electronics, get a schematic for this set and the use your multimeter set to DC volts to measure the DC levels in the vertical section of the TV. Also you will need an oscilloscope to measure the ripple voltage on the DC power supply the schematic will show you how much ripple is allowed. I hope this helps. Thank you, Shuttle83

Posted on Oct 08, 2007


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Samsung 5271f. Picture usually great but sometimes when an image with horizontal lines appears (e.g. crawl at the bottom of the screen) picture jumps and flickers. Reverts back after crawl disappears.

If you wish to get some details; visit the site linked here. Pull up older posts. Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Feb 12, 2017 | Samsung Televison & Video

1 Answer

Green Lines on Samsung DLP

Either bad capcitors, or (if you're lucky) the color wheel needs lubed up. Probably bad caps.

Jun 12, 2012 | Samsung Televison & Video

1 Answer

Horizontal line on screen sometimes

Generally horizontal lines are caused by the panel failing, you can try a new tcon but I don't think it will help.

Mar 01, 2018 | Philips FTR9955-17 DTV Receiver

1 Answer

White horizontal dashed lines appear and at top of tv screen

If you wish to get some details; visit the site linked here. Pull up older posts. Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

Mar 13, 2017 | Apex Digital GB43HD09 43" Rear Projection...

1 Answer

White horizontal lines on top of the screen otherwise picture OK.

This is a symptom of what is generally a leaky or open filter capacitor in the vertical sweep circuit. Vertical foldover, where the image actually is reflected upside down an inch or so into the top of the picture, is common in this problem. There is an IC that controls the signal and sometimes it needs to be replaced, but more often it's one of the filter capacitors nearby. Any competent technician can fix this problem and the capacitors only cost $2-3 or so if you can find the correct value at Radio Shack (that's if you pay full retail for them). A good service tech will probably have these on hand. Testing them is easiest with what's called an ESR meter (stands for Equivalent Series Resistance) and the better ones don't require you to unsolder them from the circuit board before testing. The most expensive part of this repair is going to be the technician's labor. They're good TV's, this is just a problem common to most TV's in general - mostly due to aging of the capacitors from years of heat. A higher quality replacement capacitor will solve the problem for the life of the set.

Mar 28, 2009 | Toshiba 32A14 TV

1 Answer

36 Inch Toshiba - Single Bright Horizontal Line

You're losing your horizontal voltage that drives the fly back transformer. Poking around inside can be hazardous to your health since you have to worry about high voltages present on the picture tube even when the TV is off. You may still be able to get parts for those old TV's but they may hard to find. You can try here, but if you have no background in TV repair, it will be pointless.
TV Parts Universal TV Stands DLP Chips ShopJimmy

Mar 20, 2017 | Toshiba CZ36T31 36" TV

2 Answers

Picture/image problem

Bad solder connection in the horizontal pincussion circuit.have someone resolder.God luck.4tune

Jan 09, 2008 | Televison & Video

1 Answer

White lines & inverted picture at top of CRT TV image

This problem is normally the Vertical filter capacitors. You need to have them changed before it burns out the Vertical Chip.

Good Luck
NC Electronic
Mills Wyoming

Jan 07, 2008 | Televison & Video

2 Answers

Horizontal 'pinstripe' lines on all channels

sound like the screen control on the flyback is set just a little too high. the flyback has the red wire attached to the tube. the flyback has 2 small adjustable controls. if you look close enough 1 is marked focus & on is screen. turn the screen slightly to the left & look at your picture. the screen is like a master brightness & if it's up too high you will see what is called retrace lines. good luck.

Jan 16, 2007 | Daewoo DTQ-20N3FC 20" TV

Not finding what you are looking for?
JVC AV-27230 27" TV Logo

163 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74999 Answers

Jaime Hernandez

Level 3 Expert

2326 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Are you a JVC Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides