Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

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Jvc av56wp74 blue shadow

Noticed a blue shadow on the screen, especially around letters. Performed auto converg. and noticed blue cross three times thicker than red or green. Went to manual converg. and could not get it adjusted out. A day or so later the convergance went way out as to have wavy lines and distorted picture. I replaced the convergance chips (purchaced directly from panasonic) thinking this would fix all. I ohmed out all low ohm resistors while board was out. All checked very close or right on value. Capacitors looked OK. After converg. board re-installed , did auto converg...took care of wavy / distorted picture but blue shadow still there. Cleaned lens on guns and looked at fluid and appeared clear. Tried to adjust focus of gun by rotating it...no luck. It is as if the blue gun is being over driven. I looked at the second level of service menu but do not know if it is adjustable from the menu or even If I should try it from this angle. Is it possible to swapp the green and blue gun leads on the converg. board to see if the problem moves? Will this hurt anything? Any suggestions , help, PRINTS...anything would be appricated Thanks Gmann

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My suggestion would be...to replace the focus block..john

Posted on Sep 11, 2007

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I have a toshiba tp50h50 rear projection tv and their is a blue shadow behind the words and makes the words a little blurry


Sounds like you need to do a color convergence. If you still have the owner's manual, it will give great detail on how to do this. The convergence menu is accessed from the video menu on the tv.
The tv has three color picture tubes, red, blue and green. The convergence alignment adjust each tube so that color from each tube overlaps each over to create a white image on the screen. Most tv's only allow you to adjust the blue and red colors.
Convergence should be performed each time the tv is moved and at least once annually.

May 16, 2011 | Televison & Video

1 Answer

Where is the auto convergence button


Hello
From it menu option, suf through and come to automatic convergence display option and press Ok button on the remote control.

The List & Labels part of the setup lets you edit your channel list and choose or create a

personal six-character label for each channel.

Note: Changing List and Labels can be time consuming. You can change these at a later time by accessing the

Setup menu.

1. Press the left or right arrow to scroll through the available channels and choose the

channel you want to edit.

2. Press the down arrow to highlight the In channel list option. Press the left or right arrow

button to add (the box is checked) or remove (the box is unchecked) the channel from the

list.

3. Press the down arrow to highlight the Channel label option. Press the left or right arrow

button to scroll through the available list of 25 most common labels. The last option in

the list allows you to create your own six-character label for the channel (the first letter of

the label is highlighted).

4. Press the 1 or 2 number button to change the first letter of the label.

5. Press the right arrow to highlight the second letter, then press the 1 or 2 number button

to change the second letter, etc...

6. When you are finished creating your label, press OK. For model D34W20, your TV tunes to

the last channel available in your channel list. For models D40W20 and D52W20 only, the
Auto Convergence menu appears next.

Auto Convergence (for models D40W20 and D52W20 only)

Your TV's picture tubes might have been disturbed during delivery or after you moved the TV,

causing the color in your TV to be out of alignment. The colors adjust by starting auto

convergence.

1. Press OK to begin auto convergence.

2. When the auto convergence is complete, the Red center convergence menu appears. The

cross in the middle of the screen should be yellow. If it is not, use the arrow buttons to

move the red cross to overlap the green cross. Press OK when adjustments are complete.

3. The Blue center convergence menu appears with a cyan cross in the middle of the screen. If

it is not, use the arrow buttons to move the blue cross to overlap the green cross. Press OK
(the TV tunes to the last available channel in the channel list).
Ok

Mar 16, 2011 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Picture has a red shadow. especially


Convergence problem on rear projection CRT TVs.

Apr 19, 2010 | Televison & Video

1 Answer

Just the blue on my rca projection tv is blurred. on the auto convergeance it says it cant read the sensor. on manual the cross hairs for the blue are oversized and blurred. i tryed tuning in the focus but...


Have you try adjusting your focus/screen drive controls to Tube R/G/B you have a focus/screen drive control block to adjust each Tube 3 controls ontop 3under them top ones are for Focus bottom is for screen drive.Red/Green/Blue Tubes.You might need to replace convergence IC, what is your Model number printed on back of TV?

Mar 24, 2010 | Televison & Video

2 Answers

Double Letters-One in Green other Red in bottom corner


yes goto menue and goto convergence
line up all red blue and green cross hairs so thay are wite.
thanks.
daniel

Jan 13, 2009 | Akai PT4799HD Rear Projection Television

1 Answer

Panasonic PT-60LC14 Convergence Issue


Projection TV sets have two very common problems listed below.

Problem #1) Convergence


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. This is called convergence.

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,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

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

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Nov 06, 2008 | Panasonic PT-60LC14 60" Rear Projection...

1 Answer

No blue auto convergence when performed by menu buttons


Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.

The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded over.


You can find more details and solutions here on Fixya at the following link below. Or click HERE

3d884ac.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

May 31, 2008 | RCA HD52W59 HDTV Projection Television

1 Answer

Mitsubishi VS-50705 50 in apparent convergence problem.


First thing a tech would do is solder around Convergence amps then check to see if you can align by menu then if can not. Change amps and maybe resistors.

May 19, 2008 | Mitsubishi VS-50705 50" Rear Projection...

2 Answers

Toshiba 57h82


your convergence amp ic's./if you want to cheat/align the other two colors and manualy move the green yoke rings on the green picture tube neck so the green cross aligns with the red and blue.,they shuold form white when all three are aligned,on top of each other.

Sep 13, 2007 | Toshiba 57H82 57" Rear Projection...

1 Answer

Jvc av56pw74 blue shadow


You are going to need a full convergance alignment to rectify this issue.

Aug 09, 2007 | JVC AV-27720 27" TV

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