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Thread: Do you know what this is???

  1. 28th June 2009 12:42 AM #1
    trebor3683
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    Question Do you know what this is???

    I have a Samsung 500GB hard drive that stopped working unexpectedly. I noticed a small puff of smoke. Took it out and when I looked at the back of the drive I found a burnt component (which I am trying to identify) on the PCB. Some of my research has suggested it may be a TVS Diode. If it is, what info do I need for a replacement? Will any diode work? I have tried searching for the numbers and letters together and separate with no luck. Requests sent to Samsung for a new PCB have not been answered. Does anybody have a number or web address that they answer?

    Illustrated in the picture below (click to enlarge) are arrows pointing to the bad part #1 and arrows pointing to #2 a similar component that appears to be alright. Thank you!

    #1 is pointing to the burnt out part with the following info on it (as best as I can make it out)
    Top line: [Co. Logo] 814
    Bottom: H E

    #2 is pointing to a similar component with the following info on it.
    Top line: [Co. Logo] 810
    Bottom: L E


    Do you know what this is???-samsung-hdd-back-wlabel.jpg
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  2. 28th June 2009 02:17 AM #2
    blueroomelectronics
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    Please don't triple post.

    It's probably going to be cheaper to purchase an identical drive and swap the PCBs then it would be to order a replacement PCB from Samsung.
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  3. 28th June 2009 02:27 AM #3
    Pommie
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    The item in the top left also appears to have released the magic smoke. As already mentioned it will probably be cheaper to get a new drive.

    Mike.
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  4. 28th June 2009 03:16 AM #4
    trebor3683
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    I have the new drive ready and waiting but I need to get the information from the old drive by repairing the PCB. I have been looking for a donor board but the firmware and part numbers do not match. Even date codes found are too far off. The sick part is that the drive is less than a year old and it was the backup drive. Main drive corrupt after defrag. Yes, it's under warranty but the data is what I need. Thanks!
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  5. 28th June 2009 04:45 AM #5
    trebor3683
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    Hi again,

    It's definitely the #1 as marked in the first picture. I am including closeup pictures of both areas, so Pommie if you have any further assistance I would appreciate it. Thanks again!


    This one is labeled #1 on the first picture.
    Do you know what this is???-tvs-diode-close-uplg3.jpg


    This is the other one below with the B2 Y815 on it. That chip has a manufacturing dimple in the middle.
    Do you know what this is???-close-up-chip.jpg
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  6. 28th June 2009 11:55 AM #6
    Hero999
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    Don't make duplicate threads, they're very annoying and only put people off responding!

    Help - Please!!!
    What is this part?

    Replacing the PCB is probably not economical but I understand that the data on the drive is probably worth to you more than the drive itself.

    There are probably other damaged components so replacing the diode probably won't help. Try any Schottky diode with a current rating > than the current rating on the nameplate of the hard drive if you like but don't expect any success.

    Your best bet is to have a look on ebay for exactly the same hard drive and cannibalise it. You can probably pick one up cheap if it's got bad sectors the PCB will still be fine.

    I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.

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  7. 28th June 2009 05:06 PM #7
    trebor3683
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    Sorry to all for the multiple posts. I am new here so could someone tell me how to link or cross-post my question to other groups. I tried using "tags" is that the only way? Thanks for your help.
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  8. 28th June 2009 05:46 PM #8
    Nigel Goodwin
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    Quote Originally Posted by trebor3683 View Post
    Sorry to all for the multiple posts. I am new here so could someone tell me how to link or cross-post my question to other groups. I tried using "tags" is that the only way? Thanks for your help.
    Just post it in one forum, most people read all of them anyway.
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  9. 28th June 2009 07:59 PM #9
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    OK. Thanks
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  10. 3rd July 2009 01:05 AM #10
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    Replacing that SMT capacitor is a real gamble. Most of those components are there as support devices to the nearby IC chips. There's a good chance a chip could have problems when one of it's associated components has smoked as bad as that one did. Drives are cheap these days-- just buy a new one from Tiger Direct or New Egg.com.

    Whoops! My bad-- I meant diode not cap.
    Last edited by HiTech; 3rd July 2009 at 01:07 AM.
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  11. 3rd July 2009 02:08 PM #11
    trebor3683
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    Hi everyone,

    I found out the diode was a 5v TVS diode 600w so I ordered a couple from Digi-Key (53 cents each). Should be here today so I'll give it a try over the weekend and let you all know what happens. It's worth a buck to give it a try. Thanks for all your help.

    A Happy, Healthy & SAFE Fourth of July to everyone.

    Bob...
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  12. 9th July 2009 03:38 AM #12
    trebor3683
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    Success

    Hi everyone,

    The new TVS diode worked perfectly. The drive spun up normally and read everything. I had plenty of time to make two data back-ups, two disc images and it's still going strong. Now it's time to send it back to Samsung under warranty. I'll be posting a photo of the PCB with the replacement diode installed and the specs. The TVS diode is a special type of diode who's purpose is to protect and save the circuit from damage, which it did, but it is not supposed to fail in it's entirety making the device useless. I bought extra diodes just in case - 5v and 12v. If anybody would like to have them for the cost - plus postage (through PayPal) let me know and I'll ship them to you - only within the USA or the UK. Thanks again for your concern.

    Bob...
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  13. 9th July 2009 07:53 PM #13
    Hero999
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    Good, I'm glad you got it working.

    By repairing it you've probably voided the warranty so Samsung might not take it back.

    There's now probably nothing wrong with the drive but I can understand you not wanting to use it.

    I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.

    Please ask on the open forum if you have a question and I'll be happy to help,     if I know the answer.
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  14. 11th July 2009 10:43 PM #14
    unclejed613
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    the caps were probably tantalums, they have a nasty habit of smoking for no reason. when i see them in audio gear, it's an automatic replacement.
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    "If a curl of smoke is seen, the technician will soon experience the cause of difficulty"........ CTX arcade game rgb monitor service manual 1985

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  15. 12th July 2009 10:50 AM #15
    Nigel Goodwin
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    Quote Originally Posted by unclejed613 View Post
    the caps were probably tantalums, they have a nasty habit of smoking for no reason. when i see them in audio gear, it's an automatic replacement.
    Yes, they appeared briefly in domestic electronics, but were soon dropped due to their extremely high failure rate - they commonly (and frequently) go short circuit, or very leaky.
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