Question about Sony KDSR50XBR1 50" Projection HDTV

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REPLACED LAMP IT SEEMS THE LAMP DOOR HAS A MICRO SWITCH AND ITS NOT WORKING I GET 3 RED FLASHES" BULB NOT INSTALLED CORRECTLY OR DOOR NOT CLOSED" CAN I BY PASS IT OR JUMP THE CONNECTION? ANY THING I CAN DO BESIDES ORDING THE SWITCH WAITING 2 WEEKS AND HOPING THAT WAS THE PROB ??

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  • bioguard65 Nov 16, 2008

    thank you, i bypassed the door micro switch and still 3 flash, im going to remove the entire back cover and attempt to bypass the interior switch, before i do that my question is could it possably be some other malfunction than what the indicator 3 flashes tell me >?

  • bioguard65 Nov 16, 2008

    ok ill take your advice. one final concerne, the front micro switch i beleve that is the source of this disaster is where i un pluged the connector from the tiny board the switch rests on and the end from that comes from the set i went 1.5 inch up and cut and then connected the two ends " i did this as a by pass" is this a valid procedure or is there another or better way??

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The switches (there are two of them) can be bypassed but it isn't a fun job. There are 3 connections on the switch boards and if you connect all 3 together, that should bypass the switch. There is one switch on the door and another located on the lamp socket board. You can bypass on the door but there is no way I can describe how complicated it is to get to the one on the lamp socket. So, try jumping the one on the door and see if helps. REMEMBER THAT THE LAMP IN THIS SET CAN CAUSE BURNS, VISION DAMAGE AND OTHER PROBLEMS SO AFTER YOU HAVE JUMPED THE SWITCH, PUT THE DOOR BACK ON AND MAKE SURE YOU HAVE THE CORD UNPLUGGED WHEN YOU WORK ON THE TV.

Posted on Nov 15, 2008

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  • Any Guy
    Any Guy Nov 16, 2008

    Bioguard,
    To get to the lamp safety switch is a major teardown involving disassembling thel amp chamber and removing the lamp socket. I REALLY don't recommend you try this as it is very easy to damage the set when making this repair. The entire set chassis has to be removed so you can get access to what you're looking for and should only be attempted by someone who has training on the set. Believe me, if I could walk you through this safely I would, but it's not something that I can describe easily, I had to be shown and even then when i did it by myself the first time it took me 3 hours to get everything back together and working.


  • Any Guy
    Any Guy Nov 16, 2008

    Other than a connector for the safety switches being unplugged, I have never seen anything else cause a 3 flash shutdown except bad or broken switches



  • Any Guy
    Any Guy Nov 16, 2008

    My advice would have been to bypass the connections on the switch board itself rather than cutting any wires. Your Sony tech, whoever you get might want to replace that harness you cut due to the heat produced in the set and the fear that it might cause you problems in the future. Those switches are supplied on the circuit board as an assembly.

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