Question about Toshiba TP50H50 50" Rear Projection Television

1 Answer

Yellow arch on bottom left of screen. I have

Yellow arch on bottom left of screen. I have aligned the colors and all the cross hairs will align but a couple in the lower left hand corner. These try to align but the colors are still slightly off set. TV works great other than that

Posted by on

  • 3 more comments 
  • Joseph Sep 30, 2009

    Hi thanks for the fast response!
    I tried to adjust it in the customer mode - I dont know how to get to the Tech mode. It will only not adjust on a few of the cross hairs in the lower left corner - it tries to align them but just can get all the way there.
    Thanks again!

  • Joseph Sep 30, 2009

    Hello,
    It took a few minutes but I finally got into the tech mode. In the lower left corner you could really see the curved blue lines. In the same corner the horizonal lines were yellow. I couldn't get the blue lines to adjust. I'm mechanically inclined and am willing to attempt to fix the tv. Any ideas on parts I might need and instructions? Thank you.

  • Joseph Sep 30, 2009

    Thank you very much for the help. I am going to try and fix this and hopefully things will go well. I have tried to find a service manual for this tv with no luck. Thanks again!

  • Joseph Oct 29, 2009

    It wasn't easy but I ended up replacing the convergence chips.

    First, the convergence chips are in the middle of the board and you have to dissassemble part of the plastic skeleton holding the board in place. You cant really see the convergence chips except for the reflection of them in a mirrored piece of metal on a vertical board behind them. It looks like the mirror finished piece of metal was purposely put there so you can see them.

    Second, you cannot completely remove the board to replace the chips. Once you get all the screws out of the skeleton holding the boards, you pull the whole thing straight back and out - the thick red wires are still attached (I was told by a professional NOT to unplug these). There is just enough slack to turn the board up to get to the soldering points of the chips. I used a desoldering iron and the chips fell right out. To get them back in I used the reflection again. When resoldering the convergence chips back in I used a magnifying glass to see the soldering pins (THEY ARE SMALL) and to make sure there was no bridging between soldering points. I also checked all the grey resisters - they looked good so I didn't replace them. Before I got started I numbered every wire that I had to remove and made a diagram on a piece of paper so I knew about where they were located. You will have to remove the wires also from the wiring harnesses to get as much slack a possible to move the board so I also made a note of what color wires went into what harness. The total time to replace the chips was about 4 hours over two days. I took my time to make sure everything was right - I think that is the key, take your time. After putting everything back together I turned on the TV and the problem was fixed. I made a few convergence adjustments on the TV and the picture was as good as new.

  • SD Tech
    SD Tech May 11, 2010

    Did you try to adjust in the customer or TECH mode? IF it will not adjust in some area of the screen I have a few suggestions as to what the problem is...

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Toshiba Master
  • 14,553 Answers

OK, HERE are the instructions:
Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Toshiba entry to adjust


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



Posted on Sep 30, 2009

Testimonial: "SD Tech was very helpful and responded very quickly - Highly Recommended!"

  • SD Tech
    SD Tech Sep 30, 2009

    These are general instructions--usually the chips and resistors are in the middle of the set--sometimes they are to the right---
    Near the middle of the chassis inside you should see two large metal
    heat sinks---the chips(2) are black and about 2 1/2 inches wide x 1 1/2
    inches tall and should have the STK-392-110 NUMBER printed on them in
    white.

    The hard part of this is first you have to unplug several
    cables so you can get the entire chassis tilted up so the bottom of the
    boards face the back of the set. You have to unsolder all 18 pins on
    each chip AND 4 metal pins on each heat sink--when you replace the
    chips(apply heat sink grease to them) the hard part is getting all the pins on the chips and the pins for the heat sinks lined up so they go back into the board.

    Then holding a heat sink and chip in place solder each chip/heat sink back in.

    IT
    IS A VERY GOOD IDEA WHEN YOU REMOVE THE CHIPS TO CHECK ALL THE DARK
    GREY RESISTORS AROUND THEM---most are 1.8 ohm 2 watt---they can be
    checked like checking a fuse--if one of them is open you will still
    have the same problem if you do not find and replace it---they are
    protect parts---if one is open--one of the chips got it.

    After
    you replace you can go into the TECH menu and fine adjust the
    convergence--you can do the same in the customer menu but the TECH menu
    offers more places to adjust and saves these adjustments---I have
    instructions for getting into that menu if you need them.

    If you can do the repair yourself you can save a lot of money as most shops get 300 or more for this type of repair--a pair of the chips can be bought on Ebay for about 12 dollars plus shipping.

    If you have any questions or need advice reply to this posting here.

    SD TECH





×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do I adjust the convergence properties on an RCA rear projection tv?


Normally on the RCA rear projection TV's you would bring up your menu and choose the Setup menu, then press OK on the remote. That menu would then have Convergence as a choice. Once that was chosen the next menu would give you the choice of either letting the TV run it's own Autoconvergence program, or you would select either Red or Blue convergence.

Choosing Red Convergence would bring up a Yellow cross-hair in the middle of the screen. If the Convergence was not correct you would see separate Green and Red cross-hairs. Once they were perfectly aligned you would again see one Yellow cross-hair.

Choosing Blue Convergence would bring up a Blue cross-hair in the center of the screen. If the alignment was out you would see 2 Blue cross-hairs. Using the Up and Down and Left and Right cursor keys you would adjust the alignment until a single solid Blue cross-hair was in the center of the screen.

May 15, 2011 | RCA Televison & Video

1 Answer

How to align screen e755 pocket pc


To align your screen
select Settings, System, Align Screen to ajust the touch screen,

If the screen alignment loses calibration it may not be possible to adjust alignment useing the above method.
In that case the align screen command can be executed by simultaneously pressing the power button and scroll button.

useing the stylus when comanded touch the cross hairs and the Pocket PC will align the screen

Feb 24, 2011 | Toshiba e755 Pocket PC

1 Answer

Yellow arch on bottom left 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,Pioneer2_bing.gif 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 herebb0cf99.png http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Sep 30, 2009 | Toshiba 43H70 43" Rear Projection...

1 Answer

Sony rear projection kp-51ws510. color alignment


sounds like bad convergence IC---not uncommon on this set-both convergence IC"s need to be replaced and the set adjusted

Aug 07, 2009 | Televison & Video

1 Answer

Red/Orange horizontal lines


it could be that the tv convergence circuit is going bad. One shure way of finding out is to go to the tv feature menu(picture,audio etc.) and select the customer convergence setting, you should get a cross hair pattern(cross in middle of screen). that cross should be white and by aligning the red or blue colors they should move left, right, up or down

Jul 27, 2009 | Akai PT5492S 54" Rear Projection...

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

Mitsubishi VS-50501A convergence problem. The image looks like a bow tie and the convergence will not align. This TV only has manual convergence. I already replace the STK391-020 ICs, it has 3 of them....


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. 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, Zenith, and others. You can get a convergenece repair kit wiith 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 - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV2_bing.gif 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
bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Feb 15, 2009 | Mitsubishi VS-50501 50" Rear Projection...

1 Answer

TOSHIBA 65H82


you need to replace your 2-convergence ic's #STK392-110 you need to replace both ,,they are attached to 2 big heat sinks and identified as q-751 & q-752 you can get the ic's you need plus free tec support and installation instructions including pictures at the link I gave you.
http://servicemanuals.vstore.ca/

Apr 12, 2008 | Toshiba 65H82 65" Rear Projection...

Not finding what you are looking for?
Toshiba TP50H50 50" Rear Projection Television Logo

207 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

73619 Answers

Jaime Hernandez

Level 3 Expert

2315 Answers

Henry  Thomas
Henry Thomas

Level 3 Expert

1074 Answers

Are you a Toshiba Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...