20 Most Recent Toshiba 57H81 57" Rear Projection Television - Page 9 Questions & Answers


First check the 6 resistors on the convergence board 2.2 ohm or .22
red ,red silver gold i think . if they check with in 5% , you got a bad
convergence IC , it happens. remember the chip cost about 8-12.00 etch
so , once in awhile you get a bad chip. and since the bowing red line
is normally corrected by the convergence chips . that makes them
highly suspect. also the convergence set up should allow you to
offset this . If not , swap the chips again.

also check your solder joints ,make sure you don't have any gaps.
or bridges.

If you have any questions just comment and ill respond

Rob

Toshiba 57H81... | Answered on Oct 20, 2009


your crt bulb is out and this repair is costly it would be cheaper to replace with a flat panel tv

Toshiba 57H81... | Answered on Oct 19, 2009


A light engine is NOT the reason for a short bulb life. Most likely, you have a "generic" bulb and these will NOT last in a Toshiba set. If not that--the ballast may be going bad--but I DOUBT it. Probably a cheap bulb!! Try a GENUINE Toshiba lamp first.

Toshiba 57H81... | Answered on Oct 10, 2009


Try plugging the tv in to a different outlet, also plug inside tv that is connected to power cord may be loose. That was what was wrong with mine, i just fixed it.

Toshiba 57H81... | Answered on Oct 07, 2009


unplug TV for 5+ minutes then plug back in ... might work but this usually is caused by some other internal problem that may require service.

Toshiba 57H81... | Answered on Oct 06, 2009


This is a 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-$300

Toshiba 57H81... | Answered on Sep 28, 2009


Your symptom sounds like a damaged convergence IC.

There are two and large IC’s that control the convergence in a big screen set. They are secured to a very large aluminum heat sink. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110, and they are located on the signal board (on the left as you look into the back of the set).

Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.
There are also two resistors on the front of the board located in the middle that are fusible link resistors, these should be checked for opens and replaced if they are found so.

I would suggest that you contact a service center in your area for a complete diagnosis and repair, as this type of repair can get a little tricky. But if you want to repair the set yourself, just remember to be careful. The capacitors and CRT’s can hold a charge and may shock you.


If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California, they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.

I hope this information allows you to resolve this issue.

Toshiba 57H81... | Answered on Sep 27, 2009


Two things---first if you don't mind give me a vote here--I am rated on how many problems I fix

Second---with the original remote go into the customer menu and select Convergence---see if you can adjust the other problem that way---I can if that helps you email you the instructions for going to the tech menu to adjust convergence all over the screen and and saving those adjustments----if you find the convergence will NOT adjust in some area of the screen you may have a convergence problem.

I would appreciate a vote here for my help and if you need the directions for the advanced convergence let me have your email.


REGARDS, SD TECH

Toshiba 57H81... | Answered on Sep 21, 2009


Convergence o/p ic's need to be replaced

Toshiba 57H81... | Answered on Sep 19, 2009


No good news here sorry!

Power board and video X and Y boards need intervention If you are going to take a look you will find that one or even both boards have blown capacitors and burn marks along the transitor

You might be able to claim it as fusion on your insurance policy ( parts only usually) but thyat at least is some relief


Please rate our help to kepp the FREE service online ++++

Toshiba 57H81... | Answered on Sep 13, 2009


It could be the lamp went out and needs replacement. The Toshiba website states when this happens to unplug the televison for 10 minutes then plug back in. If that does not work then try another power outlet. If that does not work then call for service

Toshiba 57H81... | Answered on Sep 12, 2009


Try disconnecting all the cables from the TV then reconnect them after a few minutes. It's suggested that you connect the power cable from the TV directly to a functional wall outlet.

If still there is no picture on the TV then it's required to replace the projection lamp.

Toshiba 57H81... | Answered on Sep 08, 2009


it's a crt socket problem.try to clean the screen cable coming from the flyback and change the capacitor in the left side ot the fly back .you may also have an unsoldering resistor or capacitor around the flyback area.

Toshiba 57H81... | Answered on Sep 04, 2009


The set may need cleaning but that will NOT correct what sounds like a convergence problem(3d type picture) this set uses two convergence chips and both will need to be replaced and any bad protect parts around them located and replaced also.

Usually just the two chips being replaced will restore the set to operation----you can clean the lenses by removing the back cover of the set---it will not help a convergence problem.

If you are not able to repair this set yourself look in your area-now is the slow time of year for TV repair shops---I do this kind of repair here in home for 200-250 depending on set. Some shops will charge 300-400 for this repair. This should be fixable right in your home---MAKE SURE WHOEVER DOES THE JOB CHANGES BOTH OF THE CHIPS.

I do this here for free so if this helped you give me a vote here. If you have questions or need help contact me here.

SD TECH(San Diego)

Toshiba 57H81... | Answered on Aug 28, 2009


Ur video ic inverter board is dead or have shorted parts.U need a new board.

Toshiba 57H81... | Answered on Aug 19, 2009


Could be a bad board within the tv but it is sometimes the source input meaning it could be dvd player, cable/satellite box, etc causing the loss of color but it is unlikely. I have one of these tvs and they use red green and blue projectors to reproduce the colors so when the red projector fails then you get purple which is green and blue colors combined without the red. I have found it to be sometimes a bad connection inside the tv and I found insects such as roaches inside others. Using extreme caution when opening the rear cover of any tv due to dangerous and fatal high voltage. You might find that simply cleaning out the inside of tv and reseating all the connectors might resolve your issue otherwise you would have haul this tv to a repair shop where you pay half the price of a new flat screen lcd for just repairing this tv which will probaly have another color go out next month.

Toshiba 57H81... | Answered on Aug 15, 2009


After the set has been on for 20 min., the heat sinks on those should be nice and warm. If they are then if you have a stand-up video I/O board with plug in jacks, make sure it is seated properly.....Try this first and let me know.

Toshiba 57H81... | Answered on Aug 14, 2009


in the customer menu--find the closed caption settings---you will most likely find the set has been set to TEXT 1---with the remote select either CC1 or OFF---the black box was for text (books) and was not ever used much---usually someone engages it by accident

Toshiba 57H81... | Answered on Aug 07, 2009


Evidently this is a common problem with Toshiba rear projection TVs. You might be able to get it working temporarily by unplugging it, pushing the power button a few times, plugging it back in, and then turning it on. Most likely your power supply is going out on you, and should be taken in to be repaired.

Temporary solution found here.

Toshiba 57H81... | Answered on Aug 02, 2009


The sound amplifier IC has went bad and needs replaced. Call a good TV Tech.
Check with the BBB 1st before you decide on one.

Toshiba 57H81... | Answered on Jul 29, 2009

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