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    Moderated By: claudio
    Agoraquest Forum Index Television Troubleshooting
      
    KV-34XBR910 Power Problem Repair Guidance Dashboard
    Replies: 6 | Views: 1,984
    Last Reply: July 8, 2011, 3:44 pm

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    jehill | BobF | mbt_junkyard | PSMatt |
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    Author KV-34XBR910 Power Problem Repair Guidance
    PSMatt
    Premium Member

    Rank: Sony Fan


    Joined: Jun 29, 2011
    Posts: 3
    From: United States

      Posted: 2011-06-29 22:26

    Hey all!! First time posting here and first off, THANK YOU so much for all your postings regarding power problems on various models.

    I have a KV-34XBR910 that started having this problem about 6 weeks ago. When I go to turn on the set, I get the degauss noise, but the TV doesn't kick in. At first I only had to hit the power button on the remote a couple of times and the TV would come on. Now I'm up to about 20 to 30 times for the TV to come on. I'm afraid to turn it off after reading a few posts where members weren't able to get their sets back on.

    Also, the last time this happened after pressing the power button on the remote, the TV did blink three times before not staring, not sure if that helps.

    Thanks to so many folks here I think I've discovered a possible solution which is to replace the MCZ3001D ICs off the D Board.

    >>I have a couple of quick questions before I get started.<<

    1. This is my first time soldering an IC. I have a motherboard from a dead PC that I can practice on. My question is can you use any soldering iron? I really don't want to spend a bundle just in case this doesn't solve the problem. I've seen soldering kits for around $15.00.

    2. Is the MCZ3001DB a suitable replacement for the MCZ3001D? When I check the schematics of the D board the part is listed as MCZ3001D.

    Thanks for your help!

    [ This message was edited by: PSMatt on 2011-06-30 12:28 ]


       


    BobF

    Rank: Sonyphile


    Joined: Feb 17, 2004
    Posts: 643
    From:

      Posted: 2011-07-03 11:13

    1)  Many people have replaced these ICs with inexpensive soldering irons.  You will want one with a fine tip.  I used a temperature controlled soldering station but those cost $50 and up.

    2) Yes, the MCZ3001DB is a suitable replacement.  There has been speculation that the "DB" variant is an improved version of the "D" model.  But I haven't seen confirmation of that.


       
    mbt_junkyard

    Rank: Sonyphile


    Joined: Sep 15, 2008
    Posts: 661
    From: EU

      Posted: 2011-07-03 11:26



    @BobF One of the PSU designers from Sony BCN-TEC (Barcelona, Spain) did confirm to me that the MCZ3001DB is an improved version of the original one.
     
    That was in the time I was involved in solving problems in KV-xxFQ86x TV's, which use the same IC.

    I've also tried to ask Shindengen for datasheets of both components, but to me they never answered any email message, even when sent from a Sony corporate email address.


       
    BobF

    Rank: Sonyphile


    Joined: Feb 17, 2004
    Posts: 643
    From:

      Posted: 2011-07-03 11:33

    • Member Quote

    On 2011-07-03 11:26, mbt_junkyard wrote:


    @BobF One of the PSU designers from Sony BCN-TEC (Barcelona, Spain) did confirm to me that the MCZ3001DB is an improved version of the original one.
      
    That was in the time I was involved in solving problems in KV-xxFQ86x TV's, which use the same IC.

    I've also tried to ask Shindengen for datasheets of both components, but to me they never answered any email message, even when sent from a Sony corporate email address.


    Thanks for the update.  (I think you might have mentioned that previously but I had forgotten that!)


       
    PSMatt
    Premium Member

    Rank: Sony Fan


    Joined: Jun 29, 2011
    Posts: 3
    From: United States

      Posted: 2011-07-03 11:46

    Awesome! Thanks for the response. The chips should arrive in the mail Tuesday or Wednesday. I was feeling a little trepidation about doing the repair myself until I called a local "Sony Platinum" repair facility. They wanted $300.00. The upside was that this was a flat rate which included a technician coming to my place to do the repair. Still, I'm confident that I can tackle this myself, in great measure thanks to your detailed overview of your own experience.


       
    PSMatt
    Premium Member

    Rank: Sony Fan


    Joined: Jun 29, 2011
    Posts: 3
    From: United States

      Posted: 2011-07-08 14:11

    Ugh! Installed both MCZ3001DB and still the same problem. Power on, I hear the degauss then nothing. Try it again, and just a little click. Any suggestions?

    [ This message was edited by: PSMatt on 2011-07-08 14:32 ]


       
    jehill
    Premium Member

    Rank: Sony Senior Advisor


    Joined: Mar 13, 2003
    Posts: 14283
    From: Sewell, NJ

      Posted: 2011-07-08 15:44



    Make sure that everything has been reconnected to the board and visually inspect your work for solder bridges or other possible errors.


       
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