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Help with HD PCB part

Discussion in 'Datasheets, Manuals and Component Identification' started by Magister73, Sep 18, 2017.

  1. Magister73

    Magister73

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    Sep 18, 2017
  2. kellys_eye

    kellys_eye

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    Jun 25, 2010
    The original thread has the right solution - swap the part from the good board to the bad board.
     
  3. 73's de Edd

    73's de Edd

    2,677
    1,085
    Aug 21, 2015
    Sir Magister73 . . . . .


    Looking at all of the other parts . . . . this parts second lines info seems to be related to a parts date code of manufacture . . like circa 2006-7 ?

    Reference :

    http://www.s-manuals.com/pdf/datasheet/1/s/1smaxxat3g_on.pdf


    Look at page 3 . . . . . line 1.

    Unless it tests as shorted . . . . . when lifted out of circuit . . . . I suspect it as not being bad, and the need to troubleshoot out that 5VDC ? . . .or LESS . . . line which it is being connected across.

    Thasssssit . . . . .

    73's de Edd
     
  4. Magister73

    Magister73

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    Sep 18, 2017
    Hello Kelly,
    yes it is, but the good board is on a working HD which I don't want to loose. If I do not find this part then will go for the swap.
    Regards
     
  5. dorke

    dorke

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    Jun 20, 2015
    Part identified as 1SMA5.0A
    Onsemi 400W 5V TVS, part marking is QE.
    Available at Digikey from several sources,here from Littlefuse.

    If you are lucky,then this is the only part defective on the board.
     
  6. Magister73

    Magister73

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    Sep 18, 2017
    You saved my day, my hero :). Thanks a lot
     
  7. Magister73

    Magister73

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    Sep 18, 2017
    Right, finally I found it, can't thank you guys enough
     
  8. kellys_eye

    kellys_eye

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    1,145
    Jun 25, 2010
    If that part has 'blown' then it points to the power plug being incorrectly (forcibly) fitted - in reverse! Putting 5V where the 12V is meant to be isn't harmful but putting 12V where the 5V is meant to go..........

    Good luck!
     
  9. Magister73

    Magister73

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    Sep 18, 2017
    I'm sure it was not incorrectly plugged, maybe an overvoltage from power supply. Hope the other pcb components didn't got any damage

    regards
     
  10. kellys_eye

    kellys_eye

    4,284
    1,145
    Jun 25, 2010
    If you've already swapped the controller board and it didn't work then there's something wrong with the hardware i.e. disk/heads.
     
  11. Magister73

    Magister73

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    Sep 18, 2017
    The board is not exactly the same, the SoC version is slightly different.so This component replacement is my only hope.
     
  12. dorke

    dorke

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    Jun 20, 2015
    Your last chance,in case nothing else helps,
    is getting the disk to "a data retrieving company",
    they can retrieve the data(most of it) from a bad hard disk(scratched etc.) by reading it from the physical disk itself.

    The problem is this procedure is very costly.:(
     
  13. Magister73

    Magister73

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    Sep 18, 2017
    Guys, it worked!!! :):):):)
    thanks for helping me to find the part. Have a good day!
     
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