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Re: Toshiba 55H70 lack of convergence, then no picture at...
Replace Both of your STKs they are your convergence ics they are big black ics have STK number on them if they are using 110s upgrde to 180s STK392-180 they are better ics. Call Electronix Parts 1-800-223-3205 they will have STKs.
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hello am rico, you need to replace your convergence ics (stk392 or 393 something esle). check for caps,fuses, resistors, cold solder in the boards. if you need more help, feel free to call at anytime. 602-810-7149.
The problems ur tv have is known as a convergence problems,it dead.The tv colors lines R,G,B mis alignment,have colors shadows pictures or 3D pictures look like.The tv convergence board have dead 2 STK convergence ICS and some or all it resistors are dead.These parts on the tv convergence board,must be replaced these parts on the tv convergence board to solved the tv picture convergence problems.The shop,will cost u $300-350 for parts and labors.
Convergence is dead.U know how to solders? Replaced the 2 convergence ICs and some or all it resistors.Buy a convergence kit at Tv repair World.com,Tvrepairkits.com to fix it ur self.The shop will cost u $300 for parts and labors.
sounds like the convergence ICs are defective and need to be replaced, they are STK392-110 you can get replacement ICs at the following link that include free instalation instructions. http://servicemanuals.vstore.ca/
You need to replace the two Convergence ICs. Please post the model number of your set and I will post the IC numbers you need and post a link where you can order replacements and get free instalation instructions with pictures so you can do the reppair yourself.
The Toshiba 55H70 is a standard rear projection set. It does not have a "lamp", it has 3 picture tubes. When the colors suddenly do not line up on the screen, it means that one of your convergence output IC's has burned out and needs to be replaced. This is very common on those sets. If your set is using the STK392-110 IC's, it is probably a good idea to go ahead and replace both IC's with the newer upgraded STK392-150 IC's. The IC's should be replaced and the convergence circuits realigned by a qualified tech familiar with Toshiba projection sets.
Its two maybe three issues that your having trouble with. First thing is the convergence. That problem could be a cold solder connection on the convergence IC's or the Ic's have a thermal problem, as after they heat up they go bad. The second is the popping. This could be an issue with the rear channel Audio output Ic intermittanly shorting and shutting down the set, or it could be a bad ground around the picture tubes, or a leaky hi voltage block, or a second anode lead going to the picture tubes could be split. The other common problem with this set is the STR#### regulator IC in the power supply. Now unless your a tech you shouldnt attempt any of these repairs as there is very high voltage in this set and could cause great harm to you. seek the help of an authorized repair shop for Toshiba. Try this # if you cant find one in your area 800-457-7777 Good Luck