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 Post subject: Inverted power issue [HITACHI hts541616j9sa00]
PostPosted: February 27th, 2010, 4:59 
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Joined: February 13th, 2010, 10:04
Posts: 3
Location: Georgia
Hello everyone, I have a problem with my 2.5 SATA HDD. I gave him an inverted power (+12 instead of +5), so now it`s not working.
http://www.imagecross.com/11/image-hosting-view-29.php?id=875827022010866.jpg
http://www.imagecross.com/11/image-hosting-view-29.php?id=208427022010867.jpg
The thing, marked "N" near the F1 has no conduction, as far as I know it`s a power protection diode, in the case of inverted power it must become a conductor preventing the hdd from further damage... But it`s not blown, and as I said has endless resistance.
So, the right leg of this diode has -5V and so does the 3 elements (small, mid, bigger) at right of it and 3 small jumpers.
One of the main questions is: where does the +5V (7,8,9 pins) go except the left leg of N diode? There`s no connection for +5V on the other side of PCB.
And the main question: what can be the reason of the dead HDD?


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 Post subject: Re: Inverted power issue [HITACHI hts541616j9sa00]
PostPosted: March 1st, 2010, 18:49 
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Joined: January 15th, 2008, 11:06
Posts: 1419
Location: Providence, RI. Boston, MA USA
Andronizer wrote:
And the main question: what can be the reason of the dead HDD?

Andronizer wrote:
I gave him an inverted power (+12 instead of +5), so now it`s not working.

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 Post subject: Re: Inverted power issue [HITACHI hts541616j9sa00]
PostPosted: March 2nd, 2010, 2:00 
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Joined: September 8th, 2009, 18:21
Posts: 16954
Location: Australia
See this thread:
hitachi-5k160-hts541616j9sa00-swap-pcb-t12119.html?hilit=hts541616j9sa00

I'm not a DR guy, but I suspect that the motor controller IC (TLS2501) may have taken a hit. It would be connected directly to the +5V supply.

If you need to replace the board, you may need the following parts to be working.

LE25FV055T, 512Kbit, 64Kx8, Sanyo, Serial flash memory:
http://www.semiconductor-sanyo.jp/ds_j/NA0447.pdf

BR93L66RF-WE2, Rohm, Microwire BUS Serial EEPROM, 256×16bits, marking RL66:
http://www.rohm.com/products/databook/g ... 76-w-e.pdf
http://www.rohm.com/products/databook/e ... r93l-e.pdf

I would confirm that neither are powered directly from +5V. To this end, test for continuity between the 4R7 coil (L1) and the power pins of each IC.

Best of luck.


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 Post subject: Re: Inverted power issue [HITACHI hts541616j9sa00]
PostPosted: March 3rd, 2010, 2:07 
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Joined: February 27th, 2009, 3:26
Posts: 1721
Location: French Polynesia Tahiti
You more than likely blew your TVS get a voltage meter and check this out

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 Post subject: Re: Inverted power issue [HITACHI hts541616j9sa00]
PostPosted: March 3rd, 2010, 7:14 
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Joined: September 8th, 2009, 18:21
Posts: 16954
Location: Australia
poehere wrote:
You more than likely blew your TVS get a voltage meter and check this out

I can't see one on this board.


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 Post subject: Re: Inverted power issue [HITACHI hts541616j9sa00]
PostPosted: March 3rd, 2010, 7:18 
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Joined: November 9th, 2006, 15:15
Posts: 2984
More than likely Fuse is damaged. This is the component marked 'N'.


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 Post subject: Re: Inverted power issue [HITACHI hts541616j9sa00]
PostPosted: March 4th, 2010, 14:09 
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Joined: February 13th, 2010, 10:04
Posts: 3
Location: Georgia
Sorry, for no answers, here`s what`s going on...
http://www.techsupportforum.com/hardwar ... ost2615205
Thank you all very much!!!


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