20 Most Recent
Toshiba 57H81 57" Rear Projection Television - Page 9 Questions & Answers
1 Answer
I already change the convergence chips and the red
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
1 Answer
Changing light engine
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
1 Answer
Toshiba 57H81 green convergence
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.aspxAnd their phone number is a 24-Hour Order Desk: (800) 274-4666I 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
2 Answers
I'm having a problem with my Toshiba 57H81 Rear
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
2 Answers
Blinking light without picture on Toshiba 57H81
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
1 Answer
I need to remove my front panel
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
1 Answer
The color seems to be off. No red, and lots of
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
1 Answer
Will not turn on...just a flashing red light
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
Not finding what you are looking for?
