Question about Hitachi 50UX26B/27K 50" Rear Projection Television

1 Answer

50UX26B Powers off after a few minutes.

My 50UX26B just started to power off after a few minutes. It will turn back on by clicking to on button twice, but powers off again by itself.

I took the back panel off and vacuumed and blew it out with compressed air thinking maybe the excess dust build-up was causing over-current somewhere, but that didn't help.

I suppose there is a bad component somewhere, so I'm wondering if someone else has had this problem with this model and found the fix for it.

Any help would be appreciated as I'd like to get this working again -- Been a good TV until now.

Thanks.

-Rodger

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  • marjamar Mar 27, 2008

    I thought the idea here was to avoid using a service company to resolve issues. On that note, I did some more checking on the internet and found the common cause to this problem with this set. I've ordered the part and once I get it installed and tested, I report back here for any who may be having the same (similar) problem.

    Thanks.

    -Rodger

  • marjamar Mar 30, 2008

    It's Fixed. The solution was to replace the STR-M6511 Switching Regulator IC. Not hard to do and cost was $5.00 US.

    Here's a link to a PDF for the IC
    http://www.alldatasheet.com/datasheet-pd...

    Here's a like to where I bought the IC
    http://www.electronix.com/catalog/produc...

    Don't have to take apart much. Back panel, 2 screws holding down the main circuit board assembly and the screw holding the IC.

    Once that's done, put the set (carefully) on it's face, lift up the circuit board assembly enough to tip it over to get to the IC leads to unsolder. Use some desoldering wick to get it loose. Check the lead bends on the old one, as you may need to rebend the leads on the new one (I did) to match. Put some heat sink paste on the back of the case and using a small needle-nose pliers, place the new IC in the holes. Screw it in tight and solder it in.

    Tip the set back up (carefully), screw the circuit board assembly back in (2 screws), check for any loose wires, plug it in and it should work.

    Hope this helps someone. And I hope others here will post their fixes as finding someone to fix a TV these days is about a lost cause from my experience, unless you know someone.

    -Rodger

  • pdgates Apr 29, 2008

    I had the same problem as MORJAMAR and did just as he stated...it works!!! TV is working like new!!

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  • 247 Answers

I don't think you'll find the solution without professional help. Have it serviced.

Posted on Mar 24, 2008

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