20 Most Recent Toshiba 50HX70 50" Rear Projection Television Questions & Answers


It sounds like the Hyper board is begining to fail....Does the menu shake too?

Toshiba 50HX70... | Answered on Jul 20, 2013


YES use your manual configuration that come with it

Toshiba 50HX70... | Answered on Sep 27, 2011


Your convergence has failed and needs to be repaired. Once quick test is to goto your convergence menu and see if you can adjust red and blue. If not its has failed and needs to be fixed. You can call in a repair shop or you can get the parts and instructions from www.TvRepairKits.com and do the repair yourself. Its a fairly easy DIY fix.

Toshiba 50HX70... | Answered on Aug 11, 2011


Tv have a dead convergence board.The convergence board require replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the convergence board to fixed the tv picture convergence problems.U have all tools and can do soldering?Yes,tries websites like Tvrepairworld.com,Tvrepairkits.com to buy a convergence kit to repair it urself.Or the shop,will $300-350 for parts and labors.

Toshiba 50HX70... | Answered on Mar 18, 2011


most likely the lamps are the cause for it if it isn't a brightness problem in the settings menu

Toshiba 50HX70... | Answered on Feb 28, 2011


Best best would be to try the following:

Start with taking the back cover off of the tv.

1) Verify if you can hear any sound whatsoever out of the speakers. If so, that would indicate that the speakers are still connected to the circuit board. If not, then trace the wires from the speakers to where they plug on to the board.

2) if you hear sound (hiss) in the speakers, but not the audio signal from your program you are watching, then look to ensure all connecters are fully seated around the RCA jacks in the back.

If those two do no produce results, then could be a solder joint on the board finally failed after moving the tv, or the amplifier for the speakers has failed. If you hear sound though as in step 1 above, i would doubt it is the amplifier IC.

Toshiba 50HX70... | Answered on Feb 20, 2011


You need a new projector bulb. Google up your model and buy the best warranteed one you can find. Buy a "caged assembly" and not just a bare bulb.

Then unplug your tv and get a screwdriver. Follow your model's instructions and just snug down the electrical screws. Do not overtighten them.

Then consult your manual on how to reset the lamp timer so it knows you put a new bulb in and fires up from the first try.

Treat yourself because you've just saved yourself a trip from a repairman!!

Toshiba 50HX70... | Answered on Aug 13, 2010


Only DLPs have Lamps,LCDs have Blub, Projections have 3 Tubes RED_GREEN_BLUE Look for Bad Capacitors they are sometimes swollen,vented or Puffed up on Top.

Toshiba 50HX70... | Answered on Jun 26, 2010


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

Toshiba 50HX70... | Answered on Apr 18, 2010


Howdy,
It sounds like you may have not have plugged something in or one the connectors are not "seated" or securely properly/tightly.
Make sure there is not any cables and modules are properly (tightly) secured and tightly secured.

Good Luck, big IRISH.

Toshiba 50HX70... | Answered on Dec 29, 2009


you need part# stk392-110 and someone to put it in

Toshiba 50HX70... | Answered on Jun 25, 2009


Your TV most likely has a convergence failure. ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem


  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
Here are some photos of convergence problems.

3dc9420.jpg
645fba6.jpg
0dcec37.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

0667c5f.pngSOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

Toshiba 50HX70... | Answered on Jun 21, 2009


yes it a soldering job, replace the 2 ics, model no. tsk..., and check the resistors at the pins.

Toshiba 50HX70... | Answered on Apr 20, 2009


HI I HAVE THE SOUND BUT NO PICTURE BAT WHEN I BEND THE POWER BOARD OR PLAY WITH IT LEFT OR RIGHT THSN I GET THE PICTURE

Toshiba 50HX70... | Answered on Apr 05, 2009


When the convergence amplifier ICs go bad (STK392-xxx), they RARELY cause more than one color to go out. The fact that the top and bottom of the picture are effected indicates the vertical convergence IC. Replace both, and while you're in there check the bias resistors... it is likely one of these is open. Once the ICs have been replaced (as well as any open resistors), customer convergence followed up with the auto convergence should do the trick.

Toshiba 50HX70... | Answered on Mar 10, 2009


NORMALY SOUND BUT NO PICTURE IS THE LAMP YOU SHOULD CHECK THAT TO SEE IF ITS BLOWN

Toshiba 50HX70... | Answered on Mar 07, 2009


Hello jcside,

its not a costly repair the parts cost about $13.99 each (Convergence Amplifier ICs) Just remember you will need to change both of them. Also you will spend about $10 - $15 on the bias resistors.

Here is some advice I posted sometime ago, it applies in your case:
This denotes a convergence problem as you surmised. Believe it or not it would be cheaper for you to replace the two convergence amplifiers and the biasing resistors. You would not actually be replacing the convergence board since these devices are usually located on the deflection board in most cases. However in answer to your question, the boards are easily removed, depending on your level of patience (lots of cables to move around), I would also advise you to either mark down all of the connection you will remove, or take pictures of the board and its connectors. If you choose to just replace the Amplifiers and the biasing resistors there is a lot of information on this site on how to do so: This will get you started:

1) Unplug the TV and then get a schematic of the TV I use http://www.servicemanuals.net or http://www.manualsparadise.com
2) On the schematic locate the STK392-xxx series IC packs (usually attached to a large heat sink)
3) determine if the STK392s are 110, 120 or 150.
4) if the STK392-xxx's are 110s replace with 110s (forget that upgrade stuff it is a hit or miss game that I don't believe you want to get into), if they are 120s replace with 120s and so on.
5)Now to replace the STKs: remove the module from the TV and unsolder theold STKs along with the bias resistors, and replace them with the newones (be sure to apply heat sink paste to the STKs when attaching themto the heatsink)
6) make sure there are no short circuits form your soldering job.
7) Reinstall the module and then turn on the TV.
8) do manual adjustment and the auto-convergence test and then things should be back to normal.


I hope this helps

Shuttle83

http://www.electron-age-technologies-llc.com

Now if you think you can do this have at it, if not I would suggest that you have it done by a qualified TV technician.

Toshiba 50HX70... | Answered on Feb 14, 2009


check your h uot transistorthen check pico fuses

Toshiba 50HX70... | Answered on Jan 22, 2009

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