Question about Toshiba 50H81 50" Rear Projection Television

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Toshiba 50h81 I bought this tv used, and noticed that the tv will go off by itself in the middle of viewing, but come right back on. The red led that indicates the power is on stayed lit up. The tv was manufactured in Sept 2001.

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It happens to my toshiba.. once in a while and gradually shutsdown every minute during the last 2 mos..

Mine is Toshiba 55 TZ, have it since 98', shutdown and red light blinking problem, search the net and found out, generally a Convergence IC (stk392-110) problem. bought 2 for $15 at suburban-elect.com (ebay). replaced following direction from http://www.casiasfamily.com/repairlog/tp50h15.html

Open back cover, 9 screws and wirings (pls mark), removed(soldered) a electronic board infront of convergence ic. removed IC (stk392-110) (screwed and soldered).

Replaced everything and voila...! it is now working again..
no more shutsdown and red blinking light. Saves mo $400 for a repariman. of course just be careful with static and stuff.

I don't know how to solder, so I ask friend to do it for me. But I did the rest. Just to give you an idea that it can be done even if you don't know much about electronics. This in no way a recommendation but just stating my experience. Follow at own risk.

Posted on Mar 17, 2008

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Red led blinking. tv wont turn on model number


Hi Rick,

First of all, thank you for posting your question here at Fixya.
My first advice is to unplug the unit from the outlet at least 30 minutes to reset itself and check if the symptoms still persists. If yes, may I know if it encountered before then there's some instances that the unit will power up after a few minutes of pressing the power button key?
Also, please double check the model number of your unit, if I'm not mistaken, it is 50H81 not 50H87.
Jdvillanueva

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You have a hardware problem, you cannot fix it using the menu. in fact you could make it worse.

Try googling DIY convergence repair if you can solder.

If not then call in a pro, about $300

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youre convergence ICs need to be replaced there are two of them they are both STK392-110 you can get replacement Ics and free instalation instructions at the following link.
http://servicemanuals.vstore.ca/

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my tv did the same thing except it is a 57in hdtv

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did your TV just cut off in the middle of watching it and it want come back on. My red light beside the power button flashes also.

May 06, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

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Mine is Toshiba 55 TZ, have it since 98', shutdown and red light blinking problem, search the ned and found out, generally a Convergence IC (stk392-110) problem. bought 2 for $15 at suburban-elect.com (ebay). replaced following direction from http://www.casiasfamily.com/repairlog/tp50h15.html

Open back cover, 9 screws and wirings (pls mark), removed(soldered) a electronic board infront of convergence ic. removed IC (stk392-110) (screwed and soldered).

Replaced everything and voila...! it is now working again..
no more shutsdown and red blinking light. Saves mo $400 for a repariman. of course just be careful with static and stuff.

Feb 29, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

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are you sure it's yoke? these are know for bad convergence amp ic's
other wise it's a screw and glue holding the yoke in place loose the screw and try to break the glue with out breaking the plastic on the yoke, the other thing you can do is adjust the magnets which have tabs on the yoke. i would mark the position's of everything on the tube with a sharpie so you can get it back to start.

Convergence amp ic bad
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

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Did you check the supply fuses to the convergence ICs? Did you check the output resistors?
if all ok i would replace the convergence ic's
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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1 Answer

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http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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