Question about Akai PTH5498 54" Rear Projection HDTV-Ready Television

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Very bottom of broadcast appears at top 1/8" of screen

Looks like entire picture is just a little too low and needs to be shifted up.
i'm guessing some type of registration problem or something out of whack w/ geometry. what settings in "mute-1-8-2" do i change?

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Re: very bottom of broadcast appears at top 1/8" of...

Select all formats (size) FIRST before going in servicer menu !
Also, try different sources.......let me know.........T.

Posted on Jan 28, 2008

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How do i remove the screen to my Mitsubishi wd-62638

For the model indicated (WD-62638) the entire screen unit needs to be removed.

Some models had two mirrors--the usual large one in back and a tiny one in the bottom front.

1. Locate and remove front plate below screen (where you may access the lamp as most of these are taken out from front)

2. Remove all the screws ON THE BACK OF THE SET around the top and both sides.

3. Remove a plate behind the removed lower front grill and there you should find a set of wires that go to front keyboard.

4. With that done look carefully at either front side below the screen unit---one screw on either side---do not remove but just back them out.

5. 2 person job---the entire screen unit lifts up and out.

6. DO NOT try to clean the large mirror---if touched with hand or your hair it will smudge and it will show in the picture.

7. If the little mirror is there at the bottom---it can be cleaned with glass cleaner---

8. Insert the screen unit back with the two front lower screws supporting it (have someone hold it in place until you line up and install all all the rear and then the 2 front screws.

Let me know if you have questions.

Mar 10, 2012 | Mitsubishi WD62628 62" Projection HDTV

1 Answer

Wavy picture on top and bottom

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...

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

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya

Mar 29, 2010 | Sony KP-53HS30 53" Rear Projection...

1 Answer

Hitachi UltraVision 50ux23k Picture seperation

The best guess is likely convergence control IC's (2 of them STK392-110) and associated circuit problem.
It's acommon fault which causes the symptom you describe - get an estimate - usually between $200-300.

Nov 03, 2009 | Projection Televisions

1 Answer

1- I have a Panasonic TV (PT-53TW54)that has a "digital scan rate of 1080i,540P". I'm not sure if that means it has a digital tuner. Do I need a digital converter for this unit? 2- I'm using a...

1. Do I need any additional equipment to watch HDTV broadcasts on my HDTV-compatible TV?
In order to view over-the-air (OTA) HDTV broadcasts, you need to be within the reception area of a TV station broadcasting HDTV signals. Some TVs may require a set-top HDTV tuner and an external antenna to receive the broadcasts. Your cable or satellite provider may also offer HDTV channels as a part of their service, eliminating the need for a separate tuner. Please contact your local service provider to find out what kind of HDTV services they may offer.

2. What is CableCARD and how does it work?
HDTVs with CableCARD slots can accept a small card from your cable provider that allows you to receive standard definition and high definition digital broadcasts without a bulky set-top cable box. Please call your cable company to find out if they offer this service in your area.

btn_top_gold.gif spacer.gif line_gold.gif spacer.gif spacer.gif3. What is HDMI? Is it compatible with DVI?
HDMI, which stands for "High-Definition Multimedia Interface", is the consumer electronic industry's first connection capable of transmitting uncompressed digital audio/video signals. Components featuring HDMI can transmit both digital audio and video over one convenient cable, replacing the tangled mess that resides behind many home theater components. HDMI also offers improved quality over traditional analog connections thanks to all-digital transmission. Digital sources like DVDs and HDTV programming can now be transferred digitally from source to display without analog conversions that can degrade the original signal.

Unlike the HDMI interface, DVI only handles digital video. Through the use of an adapter, a DVI device can be connected to an HDMI device, but only video content can be transmitted. The audio signal would have to be transmitted through other methods such as analog RCA outputs or an optical digital output.

4. What's the difference between 720p and 1080i HDTV broadcasts? Does my CRT projection HDTV support both?
HDTV signals can be broadcast in either 720p and 1080i. It's up to the broadcaster which signal format to use, and both have their benefits. Our CRT projection HDTVs display 1080i signals in their native format. For 720p broadcasts, you can use the settings on your HDTV set-top tuner, cable box, or satellite tuner to convert a 720p signal into a 1080i signal that your TV can display.

btn_top_gold.gif spacer.gif line_gold.gif spacer.gif spacer.gif5. Why do I still see black bars on my widescreen TV when viewing certain widescreen DVDs and HDTV broadcasts?
Your widescreen TV has an aspect ratio of 16:9 (1.78:1), which is the aspect ratio of HDTV. However, movies are filmed at several different aspect ratios, including 2.35:1. Also referred to as "scope", 2.35:1 is a very panoramic aspect ratio that provides a wide field of view in the theater. Scope is much wider than your widescreen TV, so it still requires the use of letterboxing ("black bars") to fit the entire image on screen. Some TVs and DVD players have a zoom function that allows you to blow up the image so it fills the screen, but the sides of the image must be cropped in order to do so.

6. What will 4:3 broadcasts and DVDs look like on a widescreen TV?
There are multiple settings for adjusting the appearance of 4:3 material on Panasonic widescreen TVs. It can be viewed with black bars on the sides, preserving the way it was originally intended to be viewed. Some viewers find the black bars distracting, so they might prefer one of the stretch modes that lets you fill the entire TV screen with the image. One such mode is the JUST (justify) mode, which stretches only the outer portion of the picture while leaving the center untouched.

Oct 21, 2008 | Panasonic Projection Televisions

2 Answers

Picture too tall

first to change format push the arrow button to the left or right. if you go into piicture in the menu then go to avance picture settings then turnoff or uncheck autoformat.

Jul 04, 2008 | RCA HD56W66 56" HDTV

1 Answer

Sony 46" Rear Projection HDTV Bad Picture

Hello, I also have the kp53xbr45 and I am looking for a red bulb, where can I find one at a good price? Thanks

Feb 09, 2008 | Sony KP-53XBR45 53" Rear Projection...

1 Answer

Missing bottom 1/4" of screen

It is possible that you have zoomed in your picture inadvertantly. Try going to picture settings and making sure that you are zoomed out all the way.

Hope that helps!

Dec 30, 2007 | Samsung HL-P5063W 50" Rear Projection HDTV

1 Answer

Black screen w/small portion of top of picture showing at bottom of screen

Hello, the problem with your projection TV is in the so called bad soldering in the vertical deflection stage. Please contact a pro in order fot fix the error. If you need more assistance please advice. Arpi

Mar 18, 2007 | Sony KP-57HW40 57" Rear Projection...

2 Answers

Full Picture Display

It's definitely not convergence. Sounds like more of a problem in the horizontal section.

Dec 19, 2006 | Panasonic PT-61HX40 61" Rear Projection...

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