Convergence Problems Set is approx. 5 years old. Red convergence was slightly off mostly in upper left corner a few months ago. Was unable to correct with remote and then it suddenly was back to normal on its own. Now, a couple of months later, turned on set one day to find red convergence seriously off throughout entire screen, particularly top and bottom. Replaced ICS 804 and 805 with new version. Convergence still off. Only could access blue crosses in manual convergence. Switched ICS with each other. Convergence still off (red bowed toward center on top and bottom. Now unable to access manual convergence with remote at all. Press it in menu and nothing happens. Checked resistors 843, 851 and 859 and they register good. The button on the board which presents convergence grid on screen no longer functions. Can no longer access service mode either by pushing in sleep button, and V status together.

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

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Convergence Problems Set is approx. 5 years old. Red convergence was slightly off mostly in upper left corner a few months ago. Was unable to correct with remote and then it suddenly was back to normal on its own. Now, a couple of months later, turned on set one day to find red convergence seriously off throughout entire screen, particularly top and bottom. Replaced ICS 804 and 805 with new version. Convergence still off. Only could access blue crosses in manual convergence. Switched ICS with each other. Convergence still off (red bowed toward center on top and bottom. Now unable to access manual convergence with remote at all. Press it in menu and nothing happens. Checked resistors 843, 851 and 859 and they register good. The button on the board which presents convergence grid on screen no longer functions. Can no longer access service mode either by pushing in sleep button, and V status together.

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Ben Rogers Jul 02, 2007

Replaced ICS with STK392-150's. Did use heat sink compound in back of ICS when replaced though. Would that have damaged the new ICS? Should I replace with new ICS (and heat sink)?
Ben Rogers Jul 02, 2007

Sorry...meant to say did NOT use heat sink compound when ICS were replaced.
Ben Rogers Jul 03, 2007

Thanks for your input, Mike. Do you know the number of the resistor I should look at?

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2 Answers

Anonymous

May want to check the circuit protectors on the power supply board

Posted on Dec 08, 2007

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1 Answer

I have a WD 65831 Mitsubishi television. I love it and have had NO problems so far with it. The picture and letters on the screen seem slightly fuzzy (out of focus). I had the bulb burn out and I replaced...

Projection TV sets have two very common problems oulined below.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

Screen looks 3D
Colors don't line up
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed or warped.
No Audio/Video - TV Makes Chirping Sound

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Solution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

TV set after fluid change

Solution #2

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc

Dec 24, 2010 | Mitsubishi Diamond WD-65831 65" Projection...

1 Answer

Convergence

did u do a repair in recent days
by replacing the convergence ICs?

Jun 18, 2008 | Toshiba 43A10 43" Rear Projection...

1 Answer

50" hitachi 10 years old has blue and green colors

Your TV most likely has one of two possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

Screen looks 3D
Colors don't line up
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Solution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

TV set after fluid change

Solution #2

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc

Dec 12, 2010 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

I have a 7 year old Panasonic HDTV. Picture quality has been great until today. As an example, the banner at the bottom of the picture is visible but it is also displaying in an arch mode above the...

Tv any colors mis alignment.The tv convergence board parts are dead.The convergence board require changing the 2 STK convergence ICS and some or all it resistors,this parts must change to solved convergence problems.The shop will cost u $300-350 for parts and labors.

Jul 27, 2010 | Panasonic PT-53WX53 53" Rear Projection...

1 Answer

3d look with little bending in bottom left corner of screen.

The most likely cause is shorted convergence chips and possibly a few pico fuses.

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 a convergenece repair kit with 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 - 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

You can see some more examples and find a fix here

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Apr 04, 2010 | Hitachi 52LDX99B 52" Rear Projection...

1 Answer

My set is 10 yrs old. In the upper left and lower

Try adjusting the convergence. If it won't move see below- red IC in particular
This sounds like 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-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 18, 2009 | Sony KP-43HT20 43" Rear Projection...

1 Answer

Yellow arch on bottom left of screen. I have

OK, HERE are the instructions:
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With the set on press MUTE on the remote.

Then press and HOLD mute for several seconds and while still holding it on the remote press Menu on the front of the set.

A (S) should appear in the upper right corner of the screen. (It means you are in the Service mode)

Press menu again on the front of the set

7 on the remote will call up the convergence grid

3 on the remote will change the color to adjust from red to green to blue(do not adjust GREEN)

You navigate the grid with 2, 4, 6, and 8 buttons.

To stop the cursor from blinking so you can adjust at any point use the 5 button—to move again use the 5 button.

When you finish you exit by hitting 7 on the remote again.

Sometimes you have to try a few times to get into the menu—I have had my problems but once in it is easy.

if adjusting does not cure the problem one of the convergence chips this set uses and or a resistor are bad.

Let me know what happens and if you need more help let me know
SD TECH

Sep 30, 2009 | Toshiba TP50H50 50" Rear Projection...

1 Answer

Can I rectify the problems below, #'s+letters"r"doubled(ghosting)

Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

Screen looks 3D
Colors don't line up
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Solution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

TV set after fluid change

Solution #2

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

Apr 07, 2009 | Philips 46PP9302 46" Rear Projection...

2 Answers

Hitachi 53fdx01b top-left corner is now duplicating picture

tv has double image color red and a curl line on left upper corner also sometime in middle of tv it has line

Jun 01, 2008 | Hitachi 43FDX01B TV

1 Answer

PT-47WX49 47 in. Rear Projectiopn Problem:

get in to the eprom setings and see if any adjustments have changed.the service manual can be gotton at servicemanuals.net

Aug 29, 2007 | Panasonic PT-47WX49 47" Rear Projection...

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398 Answers

If you did not use heat sink compound then you probably have not hurt the new IC's yet but you should remove them and add the heat sink compound NOW. If the convergence IC's are bad then you will have access to the convergence menu but the adjustments will have no effect. The fact that you switched the IC's and got the same results shows that the IC's are good. If your red convergence is still way out when the new IC's are installed then the old IC probably burned out the low value resistor associated with the Red Vertical (RV) channel.

Posted on Jul 03, 2007

Mike Longo Jul 04, 2007

Sorry, I do not know the number or value of the resistor in that model, but if you look closely at them, one may appear discolored, the result of being overheated. Each of the 6 channels should have its own identical resistor, so you should be able to compare resistance readings with an ohm meter.

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I have a WD 65831 Mitsubishi television. I love it and have had NO problems so far with it. The picture and letters on the screen seem slightly fuzzy (out of focus). I had the bulb burn out and I replaced...

Convergence

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AV-48WP30 48" Rear Projection Television

I have a WD 65831 Mitsubishi television. I love it and have had NO problems so far with it. The picture and letters on the screen seem slightly fuzzy (out of focus). I had the bulb burn out and I replaced...

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I have a WD 65831 Mitsubishi television. I love it and have had NO problems so far with it. The picture and letters on the screen seem slightly fuzzy (out of focus). I had the bulb burn out and I replaced...

Convergence

50" hitachi 10 years old has blue and green colors

I have a 7 year old Panasonic HDTV. Picture quality has been great until today. As an example, the banner at the bottom of the picture is visible but it is also displaying in an arch mode above the...

3d look with little bending in bottom left corner of screen.

My set is 10 yrs old. In the upper left and lower

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Open Questions:

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