Question about Toshiba 61H71 61" Rear Projection Television
Hey guys I have a 61h70, the convergence is out of whack (3-d) effect across the bottom of the screen and the right top corner. From all I have read on your sight it sounds like convergence chips. Which do I need? and can I do it myself w/out paying someone a bundle. Are there resources out there to tell you how to do it? thanx in advance for your help. John
You need to re-solder the circuit board that contains 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, about dead center
in the circuit board. You may be able to recreate the problem 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. This is a caused by a minimum effort (a.k.a. minimum
cost) solder job, probably done in some 3rd world sweat shop. 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-conduting piece of wood to push the heat
sink when we doing tests.
Best of luck, hope ya fix it.
Posted on Jan 30, 2008
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