Hi Mike,If the output transistor is running that hot then something is drawing to much current. if you have access to resistance charts for the set I would use a ohm meter and check down stream from the transistor for lower than normal resistances. Also does the set have a damper diode? that could be leaky.
Matt Mike Schoettinger wrote:
yes I put compuond on it. It is defintely transferring the heat because the heat sink gets so hot it will burn you after only running the tv about 10 minutes or so.------------------------------------------------------------------------ Date: Wed, 12 Dec 2007 22:44:16 -0800 From: tcccjc@xxxxxxxxxxxxx Subject: [tvservice] Re: 46W500 Problems To: tvservice@xxxxxxxxxxxxx Did you put heat sink compound or a rubber pad are the plastic ring on it before screwing it down? */Mike Schoettinger <kc8lqu@xxxxxxxxxxx>/* wrote: its running but the 2SC5909 is still getting really really hot so I don't leave it running very long because it will blow it. And the only place I found that has them at a reasonableprice is in the UK and it takes 2 weeks to get the part.------------------------------------------------------------------------ Date: Wed, 12 Dec 2007 05:13:40 -0800 From: kstang69@xxxxxxxxx Subject: [tvservice] Re: 46W500 Problems To: tvservice@xxxxxxxxxxxxx did you get it working? */Mike Selnick <selnick@xxxxxxxxxxx>/* wrote: Please remove my email address and my earlier message from your lists. Thanks,-- Mike------------------------------------------------------------------------ From: krybak1@xxxxxxxxxxx To: tvservice@xxxxxxxxxxxxx Subject: [tvservice] Re: 46W500 Problems Date: Tue, 11 Dec 2007 22:42:59 -0500 check if leads of the transistor are reversed, base and emiter cross them ------------------------------------------------------------------------ Date: Sun, 9 Dec 2007 12:55:33 -0800 From: tcccjc@xxxxxxxxxxxxx Subject: [tvservice] Re: 46W500 Problems To: tvservice@xxxxxxxxxxxxx Did you try the bridge one of the diodes maybe shorted. */Mike Schoettinger <kc8lqu@xxxxxxxxxxx>/* wrote: Hi all,I am in need of some help. This Hitachi46W500 is kicking my butt. It keeps blowing the hv drive transistor. I have replaced all the electrolytic in the circuit and the fly back and the smps transformer. Does anyone have some experience with this issue. Thanks.Mike------------------------------------------------------------------------ Your smile counts. The more smiles you share, the more we donate. Join in! <http://us.f838.mail.yahoo.com/ym/www.windowslive.com/smile?ocid=TXT_TAGLM_Wave2_oprsmilewlhmtagline> ------------------------------------------------------------------------ Don't get caught with egg on your face. Play Chicktionary! Check it out! <http://club.live.com/chicktionary.aspx?icid=chick_wlhmtextlink1_dec> ------------------------------------------------------------------------ Share life as it happens with the new Windows Live. Share now! <http://www.windowslive.com/share.html?ocid=TXT_TAGHM_Wave2_sharelife_122007> ------------------------------------------------------------------------ Looking for last minute shopping deals? Find them fast with Yahoo! Search. <http://us.rd.yahoo.com/evt=51734/*http://tools.search.yahoo.com/newsearch/category.php?category=shopping> ------------------------------------------------------------------------ The best games are on Xbox 360. Click here for a special offer on an Xbox 360 Console. Get it now!<http://www.xbox.com/en-US/hardware/wheretobuy/>------------------------------------------------------------------------Don't get caught with egg on your face. Play Chicktionary! Check it out! <http://club.live.com/chicktionary.aspx?icid=chick_wlhmtextlink1_dec>