Question about JVC AV-48WP30 48" Rear Projection Television

2 Answers

Red and Green vertical lines (pinstripes) on video source only!

I have red and green vertical lines across the entire screen top to bottom when viewing any video source but NONE inside of the video MENU when I select that... I suppose it's something related to the convergence board but want anyones experience/knowledge on this...

Thanks,

Posted by on

  • 1 more comment 
  • Maximum13 Aug 03, 2008

    My JVC I'art Pro 48 inch is starting to do the same thing... I am getting streaks(sometimes flickers) of red and green across the screen periodically, and it seems the longer the TV is on the worse they get... I have already had the board repalced for the convergence once before, about a year or so ago, and the repair man said it hafdto do with heat problems... Has this happened to anyone else, or have they figured out what it is...

    Dan

  • Tony S Aug 17, 2008

    It's a projection TV not a CRT TV so I guess some of what you are saying may still apply? When I test convergence it is perfect and the only time the pinstripes appear is when an external signal is present (that is to say the MENU and convergence screens have NO pinstripes in/thru them). Even when the picture is up with pinstripes I can bring up the MENU and inside the menu will have NO pinstripes... Don't know for sure what board/circuit is between the signal input and the actual screen output but it seems to be there...??

  • keith777 Mar 05, 2009

    i have the same problem. i tried checking the crt boards and they appear ok. i unplugged 1 at a time also. i noticed that the convergence ics are different. one is 110 the other one is 120.
    the are interchangeable. any ohter ideas?

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I had this problem, I just fixed it myself. I'm am not a tech or a pro by any means, but I am short on funds and repairs were not in the budget. I figured I had nothing to lose so I wanted to share what I did and maybe help someone out. This is to be done at your own risk, you could shock yourself or break something else.
First off, I had the conversion circuit changed a few years back. These TVs are famous for them going out, so I knew it wasn't that.
I removed the back of the TV and the plastic part that houses' the connections (RCA jacks, S-video,etc) Behind that there is a circuit board standing vertitcally incased in a metal case. I simply wiggled it back and forth and the lines went away. That told me that something was going on there.
I removed the circuit board that had the RCA jacks to make some room( I would'nt force anything in there, take your time and be sure to unclip the circuit board) I then unscrewed the "metal case" and took it apart. I dusted everything and put it back together exactlly how I took it apart. I then cleaned the lenes.
It works great now and it only cost me a hour of my time. The picture is as good as new. I hope this helps somebody.

Posted on Jun 14, 2010

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 132 Answers

I have fixed many of these TVs and don't reccomend that inexperienced or untrained consumers attempt any repairs. You may hurt yourself, others or the TV.

It sounds like it may still be convergence. Look in Convergence Gallery.

If not convergence, tap the crt boards gently from different directions. (through the front inspection panel) Tap the crt necks gently as well. Tap with the plastic handle of a long screw driver, don't use the metal end to tap or probe with. Watch the picture for microphonic effect, pic "jumps or changes" when you mechanically tap.

The TV is on and operating so the possibility of lighting yourself up exists. Tapping or probing is done with the plastic end of the screwdriver, one handed. You can't be holding the frame of the tv with your other hand, or sitting on a tangle of cables that connect the 3 vcrs, 2 games, laptop and FTA sat receivers.

Do not ever touch any innards with your bare hand when the TV is plugged in, unless you know specifically that the item/control or whatever is safe to touch. Turned off is not good enough as all modern TVs are still partially operating in the "off" mode.

Do not play with the other items on the CRT neck as many hours of time may be wasted re-aligning.

If the picture jumps or reacts to the tapping turn the power off. Unplug the TV.

There are a number of conditions that may exist.

1. CRT is defective with internal Heater cathode leakage or other fault. Typical shop estimate CRT +$300, Labor $2-400 Handling extra. JVC CRTs are rarely defective.1time/100 complaints

2. Circuit on CRT board is defective. Usually the only defect is poor solder connections. Bad solder connections 1 time/10 complaints
Typical shop estimate CRT Board +$150, Labor $2-400 Handling extra

3. Pins on CRT are dirty, corroded or loose in the CRT board socket. A poor electrical connection occurs between one or more crt pins and the socket on the CRT board. Tapping and moving the board makes and breaks the electrical contact and the pix jumps (for that color)

This is the most likely problem if it is not convergence. 9/10

The fix is simple.

Use a very small jewellers screwdriver with a flat blade. Scratch the corrosive coating off the crt pins one at a time. Start at one pin and work your way around the base of the crt. Just a minor, gentle scratching that does not bend the pins. The corrosion may coat the pins and appears as black or grey varnish instead of metallic.

After scratching the pins, each pin is bent the smallest noticeable amount outwards. Then the crt board and socket is re-installed. It will now fit tight and require some wobbling back and forth to re-install. If any serious resistance is encountered stop immediately and examine the bent pins, one or more is bent too far.

Forcing the socket on the crt when a pin is mis-aligned can break the pin or crush it against the centre. If you damage a pin, crt is junk.

Only attempt repair on the the crt socket giving problems. Preventative maintenance is not a good idea in this situation.

If cleaning and bending the pins doesn't fix, then check CRT PC board for bad solder connections on the crt socket/board connections. (circular pattern)

If you live around Calgary, call me , if not, find someone competent.

easyab

Posted on Aug 15, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

A horizontal band of green and red lines across the screen


If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent.
Type in the brand name to your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

Mar 17, 2015 | Panasonic TC-P46C2 - 46 Inch 720P Plasma...

1 Answer

Black screen, red and green line at top of screen, no sound


That is usually caused by a vertical dflection issue if the lines are single and running across the top of the screen. slightly wavy.

Jan 23, 2010 | Televison & Video

1 Answer

Thin red line, green line and yellow line going across the screen


the problem is vertical collapse,i am not so sure you can trouble shoot this on your own but you can send the board to eithor pts electronics or tristate module for repair
to get a price get the number off the sticker--left hand board(looking from the back) it will start CTC195---- write down entire number before you call them

Sep 02, 2009 | RCA P52926 52" Rear Projection Television

1 Answer

Letters and numbers are 3d and curved picture


Hello

red, green, and blue lines curve across the top of tv is cause by defective convergence STK IC or you have open resistor at convergence section. if you have defective RGB Color vertical ramp probably you have defective STK IC..

Angel
Thanks...

Aug 02, 2009 | RCA D52W23 52" HDTV CRT TV

1 Answer

Green cruve line


Good Day;
Suspect Convergence IC's STK4274, part Number 2003191. Replace all three IK04(red), IK05(green), IK06(blue).
Good Luck, big IRISH.

Aug 30, 2008 | Hitachi 50UX26B/27K 50" Rear Projection...

2 Answers

Vertical color lines


Here is a picture of my TV problem, the green horizontal line is from the camera flash. thanks for the help.4d2ca33.jpg

Jan 15, 2008 | JVC AV-48WP30 48" Rear Projection...

2 Answers

LG Rear projection tv help... Red, Blue and Green horizntal line through screen.


The complaint may be dry solderig or yoke ,horizontal or vertical oscilator

Dec 29, 2007 | Televison & Video

1 Answer

Red tint on the entire picture


Always try your extended warranty!.....Probable cause = bad
red tube. One adjustment may help---turn down red screen
control, located behind technician access panel in front of set.

Nov 04, 2007 | Mitsubishi WT-42311 42" Rear Projection...

2 Answers

Picture shows only about a 2-3" blue,green,or red vertical line down the middle


If your seeing vertical line across the screen you need to check the components in the vertical stage as well as the vertical IC could be bad, or the yoke could open.
Also check if any voltage reaching the vertical stage.

Good luck.

Was this help full.

Oct 31, 2007 | Panasonic PT-47WX53 47" Rear Projection...

Not finding what you are looking for?
JVC AV-48WP30 48" Rear Projection Television Logo

962 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Televison & Video Experts

The Knight
The Knight

Level 3 Expert

69718 Answers

easy alberta
easy alberta

Level 2 Expert

132 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

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

Answer questions

Manuals & User Guides

Loading...