Question about Toshiba 50HX70 50" Rear Projection Television

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Another Convergence Problem?

It appears as if this problem is a regular occurance however mine is slightly different and the problem may be a little easier to pinpoint for you Electronic Wizards. My TV is 4 years old and it wasn't moved or bumped that I know of. I have a green shadow arched along the bottom of my screen. I went to the menu and tried to correct the convergence. I have 9 green crosses to line up to, 1,2,3 from left to right along the top, 4,5,6 in the middle and 7,8,9 along the bottom. I think that the green crosses must be stationary as there is no adjustment for them. I lined up numbers 1,2,4,5,6 with the blue and red crosses but I couldn't line up 3,7,8,9. The 3 green crosses in the corners are not perfectly shaped so the crosses will never line up. Also, numbers 7,8,9 are too high for the blue and red crosses to line up to. Number 8 is the worst making a bowing effect. Before I have to take it in for repairs and end up buying a new ic for it I thought that I'd ask if this could be an alignment problem with the green tube and if there was a reasonnably easy way to realign it? Thanks in advance for your replies.

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Re: Another Convergence Problem?

Dont move the pic tubes that will be a costly mistake the problem is still your ics replace them all you should have two check for bad solder connections

Posted on Nov 03, 2007

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How do you access the convergence calibration menu on a RCA P52926 Rear Projection TV

To access the convergence calibration:

Press the MENU button on the remote.

2. Press 3 to select the Screen option.

3. Press 4 to select the Adjust Projection TV option.

4. Press 4 to select the Advanced Convergence option (the
Advanced Convergence screen appears).

The green pattern is fixed. The red and blue patterns are adjusted to

the green pattern. The Red Convergence appears first by default.

5. Colored cross-hairs show the current adjustment position on the

grid. To move the cross-hairs to a different position, use the

CH+/- buttons on the remote to move the cross-hair highlight up

and down, and the VOL+/- buttons to move it right and left.

6. Use the arrow buttons to adjust the red pattern. Each press of

the arrow button makes a slight adjustment from the center of

the cross-hairs - you can press and hold the desired arrow

button to make a faster adjustment, and then make fine

adjustments with single presses of the arrow button.

7. Press the INFO button to switch to Blue convergence and follow

the steps above to adjust the blue pattern.

8. Press OK to exit. You will be asked if you want to save the

Yes Saves adjustments.

No Returns to the Advanced Convergence screen allowing

further adjustments.
Clear Exits screen without making any changes

Note: Before you use the advanced convergence feature, you must
complete the previous steps to align the tubes

May 19, 2011 | RCA P52926 52" Rear Projection Television

1 Answer

My WS-65905 Mitsubishi when on an HD channel, makes the words fuzzy/blurry. What needs to be done. I talked with a TV repair guy and he says it might just be the lamp needing to be cleaned. Can I get a...

First: this model has three picture tubes--with lens--if they are dusty the picture will be duller and darker than it should be--if this was the case it would be the same HD or not.

Do not pay someone to do this--with set off and unplugged you will see the three lens--clean them with a lens cloth.

Second possible cause---CONVERGENCE.

This set has in the customer menu convergence adjustments done with the remote---they are separate in the HD from the non HD. They are done with the Mitsubishi remote and easy to do.

If convergence when you call up the menu for it the grid of yellow lines will have either red or blue out of position slightly.

A lot of these sets were never very well adjusted in the HD mode for this---check out the convergence in the NON HD FIRST!

Then go to a HD channel and call it up again---instructions on how to move, adjust etc will appear and you will know instantly if convergence is different on HD---easy to adjust.

If this works and you want to get the Convegence really good let me know--there is a way by model number to do the same adjustments but it saves them into the memory of the set.

Doing the adjustments in customer mode, if power is removed they may return to what they were before.

If all this information has helped you rate this solution as very helpful as I do this here for free.


Aug 16, 2010 | Mitsubishi WS-65905 65" Rear Projection...

1 Answer

When i try to calibrate the color lines by pressing the little convergence adj button, the lines are slightly crooked as if they were turned a little bit like a clock and i can only move them up and down.

Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s)

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

Oct 04, 2009 | Projection Televisions

1 Answer

Convergence settings won't adjust color and fish eye effect

1) Check if it happens with different video sources like Cable, Cable Box, DVD Player etc.
2) If it happens, check for the Flash Focus settings in the TV or convergence.
3) If are able to locate and still convergence occurs, perform the power reset by disconnecting the power cord from the wall outlet and connect it back.
4) If the issue occurs, your TV may require service

Sep 22, 2009 | Sony Projection Televisions

1 Answer

Black, Red and yellow triangle in upper right corner of the scrn.


Jan 19, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Sony 46WT500 Display Issue (Convergence?)

converge chip failing after warm up fairly common
to see

Dec 26, 2008 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Auto Focus Stoped Working

If the convergence is very far off the convergence ICs are bad and need to be replaced first. If the convergence is close and it wont correct it might just be an insect or some dust on the sensors at the 12, 3, 6 and 9 o'clock posistions behind the screen.

Jun 04, 2008 | Akai PTH5498 54" Rear Projection...

2 Answers

RCA Model Number R52WM24

Is this a projection set? If so you simply need to set the convergence. Otherwise I would try to return it to the retailer and exchange for different manufacturer.

Apr 22, 2008 | RCA R52WM24 52" HDTV Projection Television

1 Answer

Akai rear projection HDTV

the convergence board is available from The part number is BP95-00142E. It came shipped to me for $78... It is simple to install. Take off the lower back of the TV. The board comes out with one screw. You have to plug in the three tubes, a connector to the main board, and a power supply. On mine the connector to the main board matched up with wires and pins, but the connector was slightly different. I had to shave off one thing to get it to fit into the slot. Very easy install. Please note that the board is for this particular TV only. If you have a similar TV it probably is the same problem, BUT, the part number is also probably different. Do some research... You'll find the part. Vance Baldwin is a Samsung parts dealer. They'll have it...

Feb 08, 2008 | Akai PT4298HD Rear Projection Television

7 Answers

HC-P4752W - IC Replacement vs Convergence Module.

The colors weren't lining up correctly on my HC-P4752W which is only about 30 months old. I did a little bit of research and got ahold of the people at They recommended replacing the IC's as well as the IC resistors. I purchased the replacement parts from their site and made the repairs myself. I should mention that I didn't have any previous soldering experience. The repair was easy and a complete success. You may find replacement parts elsewhere for slightly cheaper but what you won't find is the prompt and detailed customer service that they provide. They gave me there # and said to call if I had any questions before or during repair. I took advantage of their services and got answers every time I called.

Aug 11, 2007 | Samsung HC-P4752W 47" Rear Projection...

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