Question about Panasonic PT-51HX41 51" Rear Projection Television

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Convergence adjustments I have question concerning green convergence adjustments. Is it necessary to have perfect squares with the green before overlapping red and blue?? I have replaced both STK both convergence IC's and green does not adjust to good squares;futhermore, I plan to replace all 2watt resistors related to these IC's.

Posted by Anonymous on

  • Anonymous Jul 19, 2007

    Thanks for reply TECHMAN. Yes, the IC's I replaced were exact same part # as one taken out but Japanese brand. Before replacing these STK392-110 could not even right side of green to square with pin or linear adjustments. I don't have grid or other templates so if I had a few questions answered I could eyeball a good mesh of color.

  • Anonymous Mar 22, 2014

    color is bowed and red blue green lines mixed in

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  • 3,130 Answers

Did you use the proper STK IC's Do the replacement IC's have SANYO on the face of them? If they do not, this could be your problem. You must use the IC that the manufacturer recommends. All IC's are not alike. Go to MCM electronics and enter your IC number and they sell original SANYO IC's. Good Luck

Posted on Jul 18, 2007

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What is convergence IC problem


Convergence has to do with how different colors are displayed on a screen or monitor - typically the rear projection and some other types. When colors are overlapping to create unexpected combinations, or leave gaps between areas where overlapping is expected that results in a shifted red, green or blue image strip or edge - that is an indication of a convergence issue. They can look like this in severe cases:

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Colors will drift, so manufacturers often include a utility to help you nudge the colors back in the right place. Most times this utility is buried in the Set Up Menu and when activated, produces a screen like this:

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You will need to adjust the red, green and blue colors for each cross so that only a white cross is displayed. Keep red, green and blue fringing to a minimum. When you're done, the screen should look black and white, symmetrical and straight - like this:

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Problems arise when you are no longer able to coax the utility to give you these crisp, B&W results with no red, blue or green ghosting. This is often due to a failing convergence integrated circuit ("Convergence IC"). Many times, replacing it will solve the problem, but other times it can be the result of failing components either ahead or after this IC. If you're attempting to replace this IC, please make sure the TV or monitor has been *unplugged* for 24 hours or more to allow the dangerously high voltages to dissipate.

Sep 08, 2014 | Hitachi 50VS810 50" Rear Projection HDTV

1 Answer

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

Tv out of foucs


These procedures are from the owners manual, go into menu and then picture quality and then: Convergence The Convergence feature lets you adjust the TV’s three tubes. When the TV tubes’ images are precisely aligned, they create the color images you see on the screen. Over time, the picture can drift out of alignment (this is normal). If your picture seems fuzzy or has a yellow tint, using Convergence could correct this misalignment. Only one convergence is needed for all inputs, regardless of the signal format. Note: Make sure the TV has been on for at least 30 minutes (TV needs to warm up for best results) before starting Auto Converge or Red/Blue Centering. When you select the Convergence feature, a submenu appears with three options: Auto Converge Automatically aligns the projection lenses to self-correct color images. You’ll see flashing squares of color dance across the screen (this is normal). Note: After performing auto convergence, use the Blue Centering and Red Centering menus to fine tune convergence in the center of the screen, if necessary. Blue Centering Aligns the blue and green images to fine-tune the picture. Red Centering Aligns the red and green images to fine-tune the picture. Note: The ability to change channels is disabled when adjusting the convergence options. The TV must be tuned to a usable signal to converge the picture.

Apr 23, 2010 | RCA HD52W58 52" TV

1 Answer

Curved red image on 46" Akai rear projection TV


Yes! an idea that the flyback transformer is shot!


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Aug 29, 2009 | Akai PT4298HD Rear Projection Television

1 Answer

Covergence out of alignment on 1/4 Vertical left side of screen


You need to manually adjust the alignment:
On remote, press Menu to get to the main menu
Then arrow down to "ADVANCED FEATURES"
Then press "enter"
Then Arrow down to "CONVERGENCE" and press "enter"
"Red Convergence" should be highlighted
Press "enter"
You now have Green, Red, and Blue overlapping crosses.
If Red is out of whack, use arrows to align
To toggle to blue (and back to red), press "VIDEO"
Then align blue cross
Once the crosses look aligned, and nice and white, press "AUDIO"
This will bring up the Advanced Convergence screen
This is a grid of the same overlapping colors
You have control over the Red and Blue
If Green is very out of whack, you'll need a repairman…
While the "target" is flashing, you can move it around the screen with the arrows
Place it over an intersection to adjust, then press "enter"
Now the "target" is steady (not flashing), and you can use the arrows move your color
When it's aligned, press "enter" again
Now "target is flashing, and you can go to the next square.
You cannot adjust every intersection.
Some areas need to be adjusted via the adjacent intersection
When you're happy with color you're working on,
Press "video" while target is flashing to change to the other color
Repeat the above (blue is much harder to see and adjust for me…)
When you're happy with the entire grid, start hitting "Menu"
Each press brings you back out one menu level, until you are out of them
Once you're used to the process, it should take no more than a minute or two.

Mar 02, 2009 | Mitsubishi WT-46805 46" Rear Projection...

1 Answer

Fuzzy Blue...?


these set are bad about the blue tube messing up.. what happens is the convergence board witch generates alot of heat cooks the blue glycol.... basically growing algea in the blue tube... it is possible to remove the tube.. and remove glycol and clean the tube then replace and adjust..i have done a few here at the shop

Mar 14, 2008 | Akai PT4298HD Rear Projection Television

1 Answer

Red/green drooping L top corner


i have found when samsangs convergence are out of range perfect focus will fail. if the are out of range a technician will try to adjust the set in service mode. store these values and then this will be the base for the perfect focus. If the set has a bad convergence cuircit then they have to be replaced.

Nov 05, 2007 | Samsung HCN653W 65" Rear Projection...

1 Answer

Convergence problem


Blue convergence IC is bad! Blue CRT OK!

Required for repair---pull chassis,replace STK392-110 X 2.

Re-assemble,adjust convergence as needed.

Oct 12, 2007 | Toshiba 57H82 57" Rear Projection...

2 Answers

Convergence


Im trying to install that same board on the same tv how did you do it?

Apr 06, 2007 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Green out of convergence


The green convergence IC is defective. this is not a job for the consumer to do as it requires the experience of soldering and unsoldering and the know how and the safty nissues concerning the HI voltage inside these sets. Please consult a pro to assit you in this matter. Good Luck

Jul 01, 2006 | Toshiba 55H70 55" Rear Projection...

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