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

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JVC convergencehas to be adjusted everytime the TV is turned on

I just replaced the IC's on my JVC and now can adjust the convergence and the picture looks fine.But everytime the TV is turned off the convergence has to be readusted.No porblem setting the convergence but why everytime it is turned off and back on?I did not see anything on the convergence board other than the IC's that looked bad.Is this hard on the TV to keep adjusting the convergence?If I leave it turned on it stays good but it moves if turned off.

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Re: JVC convergencehas to be adjusted everytime the TV is...

I have the same tv, it was working just fine, and one day, it just turned like 3-D, i tried to set the convergence, but the red crossed won't move left or right, what do i do?

Posted on Feb 15, 2008

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Re: JVC convergencehas to be adjusted everytime the TV is...

You will need to enter servicer mode to do the alignment then
save is in service manual........
Does your set have an auto-focus selection ? Try that first...T.

Posted on Dec 26, 2007

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Tv is about 6 years old hd-ila 56g657 have replaced lamp 3 times over that time but the picture started to get darker and darker.the last time i replaced the lamp it did very little good and the ptcture...

you cleaned the reflector glass, then tried to make the manual adjustment of the color to have good convergence. you can do the adjustment in the menu set up. if can not get with adjustment, their might be a problem in the convergence circuit board.a bad convergence ic or resistor.

Nov 18, 2012 | JVC HD-56FB97 HDTV

1 Answer

Have a Sony KP-65WV600, already replaced d board once, and replaced convergence ic's once also. Now as soon as I turn unit on, turns to red screen and shuts off, video that is, audio works ok, noticed...

Check High voltage Block.After replacing ic's (STK convergence ic's) you need to adjust Black&White scale.Turn ALL screen adjustments to min.Turn TV on and adjust screen slowly for each gun (I would start with Red first ) when you came to point that you see red background with white lines across, at that point G2 is too high (that will cause TV to shut down,don't worry just lowered adjustment and turn tv back on) so adjust to proper voltage and do the same for each gun.After that, adjust focus for each gun (again all controls are on High Voltage Block and HVB is mounted on front of your tv after you take speaker gril out) black box with 6 controls' screen RGB, focus RGB .
You should do that in dark room in order to get perfect Black&White scale,when all guns are adjusted properly you will see grey picture.Make sure 'Color" adjustment on your display is down to 0. Another step is convergence adjustment ,Flash Focus etc.If TV stil shuts off after all, your Red picture tube is short inside,take crt pcb from tube,make sure TV is unpluged from power before that, and turn Tv on .If stays On tube need replacment...good luck)

Aug 22, 2011 | Sony KP-65WV600 65" Rear Projection...

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JVC AV-48WP30 convergence drifting after IC replacement

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

Convergence problems are very common on all Projection TV sets including Sony,Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit wiith instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms
  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted or warped
  • No Audio/Video - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV may have one or more of the following symptoms....
  • Dull looking picture
  • White looking picture
  • Halos around objects
  • Red/Orange looking picture

You can see some more examples and find a fix here

Mar 16, 2010 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Color blue will not adjust on crt color conergence adjustment , picture on tv is double with blue on right side, auto/manual mode , the color blue will not adjust on right or middle side from side to side,...

This is a convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$300

Sep 27, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Double picture

does your TV has the stat adjustments in the CRT or near the chroma IC it is a trimmer resistor or a rheostat try to adjust it...

Jul 26, 2008 | JVC AV-56WP30 56" Rear Projection...

1 Answer

Red Convergence on JVC AV- 65WP74

convergence amp ic bad
Sony Convergence

Jan 28, 2008 | JVC AV-65WP74 Rear Projection Television

1 Answer

JVC projection tv

Mike, convergence adjustments are in your menu, usually under "video" settings. You have to adjust red & blue onto the green, when you`ve done it correctly the "cross" will be pure white, if you cannot move either of the colors left, right, & up, down then the convergence IC`s have failed and will have to be replaced, hope this answers your question, BMW Rider

Dec 30, 2007 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Picture problem

Try to adjust the convergance adjustment.If it is not adjusting by menu then try to change the ic convergance.

Dec 27, 2007 | JVC AV-56WP30 56" Rear Projection...

1 Answer

Red Convergence on JVC AV- 65WP74

PCB's when available,are expensive.Replace convergence IC(s),

re-adjust and you are good to go!

Oct 12, 2007 | JVC AV-65WP74 Rear Projection Television

1 Answer

Convergence always needs tweaking

This sounds to me as if you have a defective convergence output IC, whose gain is now sensitive to heat. As the IC gets warm, the gain changes and you see the colors separate. If you do not want to do any soldering then have the IC replaced by someone with experience in convergence circuits.

Jun 24, 2007 | JVC AV-48WP30 48" Rear Projection...

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