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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  • 143 Answers

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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Posted on Jan 02, 2017

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1 Answer

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


Hello
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
adjustments

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

2 Answers

Miss when slightly throttled


Sounds like you need a new air filter.Mine does the same thing, except I'll get a backfire through the air filter right on my knee and scares the **** out of me every time.

Mar 06, 2010 | 2003 Honda VT 600 CD Shadow

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 | Televison & Video

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 Televison & Video

1 Answer

Akai rear projection HDTV


the convergence board is available from vancebaldwin.com. 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 http://servicemanuals.vstore.ca/ 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...

1 Answer

Ripples appear in the image when photographing an object with fine plaids or stripes. Why is that?


The following describes the symptoms, cause and prevention of the Moire effect. Symptoms of the Moire effect When you are shooting a subject that has a fine regular pattern such as stripes or plaids, a ripple that does not exist on the subject sometimes appears in the image. This effect is called the Moire effect. Why does the Moire effect occur? Digital cameras and camcorders are equipped with imaging devices such as CCD sensors and CMOS sensors that have pixels that are finely aligned horizontally and vertically that convert light into electronic signals. When the pixels and the pattern on the subject overlap slightly misaligned, an interference pattern occurs and a ripple that does not exist on the actual subject may appear. This is the Moire effect. Preventing the Moire effect You can reduce this effect by changing the distance, zoom setting or the angle of the image. If you are using a camera with manual focusing, the Moire effect can be reduced by simply changing the focus slightly. Reference You may find another Moire effect displayed on the LCD of the camera. As this is caused by the aligned pixels on the LCD, this effect does not necessarily appear in pictures you have taken.

Sep 04, 2005 | Canon Optura 500 Mini DV Digital Camcorder

1 Answer

Ripples appear in the image when photographing an object with fine plaids or stripes. How can I fix that?


When you are shooting a subject that has a fine regular pattern such as stripes or plaids, a ripple that does not exist on the subject sometimes appears in the image. An example of this can be seen in the pictures below. The photo on the left shows the fine plaids pattern on the shirt. The photo on the right is a distance shot of the same shirt. In this photo, you can see a ripple that is not visible in the photo on the left. This effect is called the Moire effect. Why does the Moire effect occur? Digital cameras and camcorders are equipped with imaging devices such as CCD sensors and CMOS sensors that have pixels that are finely aligned horizontally and vertically that convert light into electronic signals. When the pixels and the pattern on the subject overlap slightly misaligned, an interference pattern occurs and a ripple that does not exist on the actual subject may appear. This is the Moire effect. Look at the image above. This image shows red cross-stripes and black cross-stripes overlapped slightly misaligned. When you look at the entire image, you find a ripple that differs from either of the patterns. This is the same principle that causes the Moire effect. Preventing the Moire effect You can reduce this effect by changing the distance, zoom setting or the angle of the image. If you are using a camera with manual focusing, the Moire effect can be reduced by simply changing the focus slightly. Reference You may find another Moire effect displayed on the LCD of the camera. As this is caused by the aligned pixels on the LCD, this effect does not necessarily appear in pictures you have taken.

Sep 04, 2005 | Canon GL2 Mini DV Digital Camcorder

1 Answer

Picture ripples


The following describes the symptoms, cause and prevention of the Moire effect. Symptoms of the Moire effect When you are shooting a subject that has a fine regular pattern such as stripes or plaids, a ripple that does not exist on the subject sometimes appears in the image. An example of this can be seen in the pictures below. The photo on the left shows the fine plaids pattern on the shirt. The photo on the right is a distance shot of the same shirt. In this photo, you can see a ripple that is not visible in the photo on the left. This effect is called the Moire effect. Why does the Moire effect occur? Digital cameras and camcorders are equipped with imaging devices such as CCD sensors and CMOS sensors that have pixels that are finely aligned horizontally and vertically that convert light into electronic signals. When the pixels and the fine pattern on the subject overlap slightly misaligned, an interference pattern occurs and a ripple that does not exist on the actual subject may appear. This is the Moire effect. Look at the image above. This image shows red stripes and black plaids overlapped slightly misaligned. When you look at the entire image, you find a ripple that differs from either of the patterns. This is the same principle that causes the Moire effect. Preventing the Moire effect You can reduce this effect by changing the distance, zoom setting or the angle of the image. If you are using a camera with manual focusing, the Moire effect can be reduced by simply changing the focus slightly.

Aug 31, 2005 | Canon PowerShot Pro1 Digital Camera

1 Answer

Picture ripples


The following describes the symptoms, cause and prevention of the Moire effect. Symptoms of the Moire effect When you are shooting a subject that has a fine regular pattern such as stripes or plaids, a ripple that does not exist on the subject sometimes appears in the image. An example of this can be seen in the pictures below. The photo on the left shows the fine plaids pattern on the shirt. The photo on the right is a distance shot of the same shirt. In this photo, you can see a ripple that is not visible in the photo on the left. This effect is called the Moire effect. Why does the Moire effect occur? Digital cameras and camcorders are equipped with imaging devices such as CCD sensors and CMOS sensors that have pixels that are finely aligned horizontally and vertically that convert light into electronic signals. When the pixels and the fine pattern on the subject overlap slightly misaligned, an interference pattern occurs and a ripple that does not exist on the actual subject may appear. This is the Moire effect. Look at the image above. This image shows red stripes and black plaids overlapped slightly misaligned. When you look at the entire image, you find a ripple that differs from either of the patterns. This is the same principle that causes the Moire effect. Preventing the Moire effect You can reduce this effect by changing the distance, zoom setting or the angle of the image. If you are using a camera with manual focusing, the Moire effect can be reduced by simply changing the focus slightly.

Aug 31, 2005 | Canon PowerShot SD300 / IXUS 40 Digital...

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