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WD1200JB PCB Failure No ROM

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ddrecovery

Post subject: WD1200JB PCB Failure No ROM

Posted: November 22nd, 2014, 18:29

Joined: June 11th, 2013, 17:01
Posts: 1772
Location: Phoenix, AZ USA

The above drive has a blown PCB. Big hole in the motor chip. The board has parallel flash so cannot swap ROM chip. I have a donor board which gives me access to SA, but not data due to the incorrect ROM. The original board does power up, but stays BSY. Is there anyway to get the original ROM from the SA? (don't think there is with this drive family). Guess my only option is to try to get the board to come RDY? Removing TVS chip does not work.

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mr_spokk

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 22nd, 2014, 19:03

Joined: May 21st, 2007, 16:10
Posts: 1592
Location: Gothenburg/ Sweden

Swap ROM (flash)...

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ddrecovery

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 22nd, 2014, 20:47

Joined: June 11th, 2013, 17:01
Posts: 1772
Location: Phoenix, AZ USA

ROM is integral on the I chip. Not possible to do a chip swap.

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thatdellguy

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 22nd, 2014, 22:08

Joined: August 19th, 2007, 17:30
Posts: 1898
Location: In your hard drive.

Flash rom is right in front of you. Pretty easy with adapter and reader. :shock:

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thatdellguy

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 22nd, 2014, 22:12

Joined: August 19th, 2007, 17:30
Posts: 1898
Location: In your hard drive.

ddrecovery wrote:

Is there anyway to get the original ROM from the SA?

That was pretty funny! :mrgreen:

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jono-ats

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 23rd, 2014, 1:24

Joined: June 8th, 2006, 19:44
Posts: 3144
Location: Atlanta, GA

U8 is it.

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fzabkar

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 23rd, 2014, 1:34

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

jono-ats wrote:

U8 is it.

:shock:

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mr_spokk

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 23rd, 2014, 4:48

Joined: May 21st, 2007, 16:10
Posts: 1592
Location: Gothenburg/ Sweden

ROM is on U2...

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ccc

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 23rd, 2014, 6:38

Joined: January 9th, 2007, 11:12
Posts: 410
Location: Romania

M29F102BB...That's the rom chip you should move it to the working board.

Rgds

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fzabkar

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 23rd, 2014, 7:04

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

Tutorial - Linear and Switchmode Regulators used in HDDs:
http://www.alexsoft.org/viewtopic.php?f=59&t=231

Datasheets for HDD semiconductors, regulators, op-amps:
http://www.users.on.net/~fzabkar/HDD/HD ... _Regs.html

Datasheets for HDD memory ICs including EEPROM, EPROM, flash:
http://www.users.on.net/~fzabkar/HDD/HD ... Flash.html

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jono-ats

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 23rd, 2014, 10:35

Joined: June 8th, 2006, 19:44
Posts: 3144
Location: Atlanta, GA

My error -- you're absolutely right.

Maybe I shouldn't post so late at night!

The ROM is U2.

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ddrecovery

Post subject: Re: WD1200JB PCB Failure No ROM

Posted: November 24th, 2014, 16:56

Joined: June 11th, 2013, 17:01
Posts: 1772
Location: Phoenix, AZ USA

jono-ats wrote:

My error -- you're absolutely right.
Maybe I shouldn't post so late at night!
The ROM is U2.

fzabkar wrote:

Thank you.

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