Question about Toshiba Televison & Video
Posted by Anonymous on
The old projector TV's are using 3 lamps for Red Green Blue....in your case the Green lamp stopped working....either the Green lamp burned or the lamp board is defective.
Posted on Mar 31, 2016
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Posted on Jan 02, 2017
SOURCE: Double IMAGE of RED
Replace STK-392-110 IC's mounted on large heat sink.Check
B+ resistors with meter or at least look at them = any heat stress?
Let us know if you need more help....T
Posted on Oct 26, 2007
Posted on Dec 05, 2007
You have a problem with the STK convergence modules. They're on the
center circuit board attached to an aluminum heat sink that's about 8"
long and 6" tall. You may be able to recreate the problem (hour glass
effect) by gently moving the heat sink (which the modules are connected
to). This gives the hour glass effect on the picture and the advanced
convergence screen. This is an indication that the modules pins aren't
solidly connected (meaning soldered) properly. Remove the circuit board
and clean the old solder off & resolder the modules pins to the
circuit board reconnected the board and then retest by again pushing on
the heat sink. The "factory" job was good enough for 3-4 years
but the heat (and these modules do create a lot of heat) and stress
created from repeated use eventually takes it's toll, weakens the pin
connections and our problem occurs. take the appropriate cautions
working around the high voltage of the set & use a non-conducting
piece of wood to push the heat sink when doing tests.
If soldering doesn't help, then the modules have died and need replacing. Don't buy the $10 cheap ones. Most of them have an upgraded version that is stronger. Also look for any burned resistors in the vicinity of the modules.
Best of luck, hope ya fix it.
Posted on Feb 15, 2008
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