Question about Hitachi 53UDX10B 53" Rear Projection Television

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Hitachi ultravision 55 inch

Just put conversions in it but does not power up the red light in front stays on but nothing else

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Check to make sure you reconnected the jumpers to connect the board that you removed. Also, check to make sure no resistors are burning. If still no pix, make sure you reconnected multi pin plug by digital convergence unit (DCU). Next, disconnect conv. plugs marked red, green and blue. This should allow power to come up if chip(s) are bad. Next, check pico fuses on board by jumper connectors or in power supply. If these are open look for solder bridges around conv. amps. Also, if any of these are open check all zener diodes beneath heat sinks where you installed conv. amps. Probably 27 v glass zeners shorted if solder bridges were created when changing chips. Good luck, sometimes you just get a bad I.C,Russmann.

Posted on Nov 05, 2008

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http://www.digitalhome.ca/forum/showpost.php?p=564268&postcount=220
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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