Question about Hitachi 53UDX10B 53" Rear Projection Television
Have Hitachi 53UWX10B rear projection from 2002. Had convergence kit installed 16 months ago. Last of 4-5 repair visits over life of set. Now it will go in and out of color alignment and picture is curved @ top and bottom toward center of screen. Problem is only intermittent for last 6 weeks. Picture is fine and then sometimes it starts acting up. I suspect the possibility of a loose connection since when prob starts if you tap side of cabinet usually will go back to normal. One service center said they just want to come and replace convergence kit for $500.00 or so. That stinks!! Don't think this TV is worth that kind of investment, especially if repair will only last a year or so. Also I found in basement a box of assorted resistors a tech must have left here on one of the visits. There must be 300-400 total they must be worth something to a repair tech, right??
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 (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. 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 22, 2008
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