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    October 17, 2013, 10:29 pm

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    Moderated By: claudio
    Agoraquest Forum Index Television Troubleshooting
      
    KV-34XBR910 6/7 Blink Dashboard
    Replies: 6 | Views: 9,631
    Last Reply: January 20, 2008, 11:38 am

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    josephdragan | BobF | maethros | andyross | Ra |
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    Author KV-34XBR910 6/7 Blink
    maethros

    Rank: Sony Fan


    Joined: Mar 04, 2004
    Posts: 1
    From: Arkansas

      Posted: 2007-04-04 11:29



    Warning, this is a long read.

    Background:
    3 days ago my "perfect" KV-34XBR910 (Feb 2004 build) decided not to power on and gave a 7 blink repeating code. Unplugged it for for a few hours, came back and then it would give a 6 blink repeating code. Playing around with it would cause it to either 6 or 7 blink. Being an Electrical Engineer, I decided to dig around a little and see if I could easily fix the problem.
     
    I came here and began reading about the many problems folks were having with their D boards. I then called Sony and they would not even talk to me about the problem until I had an "certified" diagnosis. Well, there are only two "certified" Sony technicians in my area and when I called them and asked them about the problem and their experience with D boards, all I got was deer-in-the-headlights. Each of them said they usually replaced the D board and if that didn't work, they always recommended scrapping the TV! It was obvious I knew far more about repairing these TVs from my limited research than they knew.
     
    I was really was not in the mood to pay $100 for one of these guys to come out and tell me "oficially" what I already knew, so my wife, who's very outspoken and confrontational, got totally in Sony's face on this problem. She was actually elevated through 3 levels of support during the phone call and finally the case was sent to the "executive committe" for review. She was told to expect a response in a few days, but I'm not holding my breath.

    In the meantime, I decided to go ahead and try a replacement of IC6501 and IC8002 since these seemed to come up as solutions most often. When I looked up the part number in my service manual, I noticed the XBR910 used a MCZ3001DA instead of the MCZ3001D like the XBR400s that were mainly discussed here.
     
    It was then that I realized that Sony must have realized there was a problem with the MCZ3001D chip and sought to remedy it. A little more digging turned up the following chip revision progression (I use the XBRs here but the other models of the same vintage use the same chip):

    KV-xxXBR400
    875967030 MCZ3001D

    KV-xxXBR800
    875967030 MCZ3001D

    KV-xxXBR910
    670335501 MCZ3001DA

    KV-xxXBR960
    670581001 MCX3001DB

    All three original Sony part numbers now point to 670581001 MCX3001DB as the replacement part on Sony ServicesPLUS. Unfortunately I do not have spec sheets for the 3 versions of the chip so I can't know for sure what was changed at each revision.

    I've gone ahead and ordered two MCX3001DB chips, pulled the old chips and installed 18DIP sockets on the D board. If I get the standard "we do not believe there was a design/manufacturing problem" line from the "executive comittee", I am going to nail them with this chip revision issue.

    Anyway, I hope this little bit of information is helpful to others struggling with this problem. I'll followup and let you guys know how the repair goes and what Sony says.




    [ This message was edited by: maethros on 2007-04-04 11:30 ]


       


    BobF

    Rank: Sonyphile


    Joined: Feb 17, 2004
    Posts: 643
    From:

      Posted: 2007-04-05 01:57

    Very interesting stuff.  And that's some good detective work that you've done.

    Could it be that the MCX3001DB IC is simply a compatible replacement and that it doesn't represent any sort of design improvement?

    Could the IC failures be caused by the surrounding circuitry and not a defect in the IC itself?

    And does Sony even have anything to do with the design of these ICs?

    On the repair shop practice of replacing the D-Board, that's probably the easiest and most profitable path for them to take.  They don't have to do any board level diagnostics or time-consuming de-soldering/soldering and swapping the boards out is fast and easy.

    And that's a shame since the $240 cost of the D-Board pushes the total repair cost beyond what many owners are willing to pay.  As a result many of these top-of-the-line TVs are ending up in dumpsters.

    I was certainly in that position with my 36XBR400.  The repair estimates were over $400 and I could buy a used, but working, replacement of the same model TV for less.  And my TV just needed a $6 MCZ3001D.

    Good luck with getting an out of warranty repair through Sony.  Some have been successful.  I tried that route for my 36XBR400 but I had no luck.  But I didn't push it since  bought my TV used and it was about five years old at the time it failed.

    Bob

     




       
    Ra

    Rank: Sonyphile


    Joined: Oct 21, 2006
    Posts: 538
    From: Mass

      Posted: 2007-04-05 18:04



    Electronics on line have the MCZ3001D for 8 bucks,


       
    andyross

    Rank: Sony Legend


    Joined: Mar 09, 2004
    Posts: 1093
    From: Schaumburg, IL

      Posted: 2007-04-06 11:31

    From some searching, the MCZ3001 is manufactured by ETC. I'm having problem finding a web address for them, if one exists.

    Is MCX3001 a typo? I can't find anything on that.


    -----------------
    Sony KDL-46EX700, Onkyo TX-NR609, Sony BDP-S370, WDTV Live Streaming, Motorola DCT-6412, RCA RCRP05B.


         
    BobF

    Rank: Sonyphile


    Joined: Feb 17, 2004
    Posts: 643
    From:

      Posted: 2007-04-06 15:26






    On 2007-04-05 18:04, Ra wrote:


    Electronics on line have the MCZ3001D for 8 bucks,


    That's a good price!  I think they cost much more if you go through Sony.

    The one's that I bought were about $6 each via an eBay seller. 

    The cool thing is that I bought three ICs and the seller went ahead and sent two additional ICs for free.

    Bob


       
    BobF

    Rank: Sonyphile


    Joined: Feb 17, 2004
    Posts: 643
    From:

      Posted: 2007-04-06 15:31






    On 2007-04-06 11:31, andyross wrote:
    From some searching, the MCZ3001 is manufactured by ETC. I'm having problem finding a web address for them, if one exists.

    Is MCX3001 a typo? I can't find anything on that.



    I'm guessing it's a typo.  The only hit Google returns for "MCX3001DB" is this thread.

    But there are hundred of hits for "MCZ3001DB".  Perhaps that's what maethros meant to type.

    Bob


       
    josephdragan

    Rank: Sony Fan


    Joined: Oct 25, 2003
    Posts: 4
    From:

      Posted: 2008-01-20 11:38

    Has anyone had any success in fixing this problem by replacing the MCZ3001DB ?
    I have the same symtoms on my XBR 910 and would love to try this fix.
    Joe


       
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