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Message from discussion Motor controller chip failure
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Tim Farren  
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 More options Nov 10 2012, 3:40 pm
From: Tim Farren <t...@farrentech.com>
Date: Sat, 10 Nov 2012 15:40:02 -0500
Local: Sat, Nov 10 2012 3:40 pm
Subject: Re: Motor controller chip failure
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Sounds great. What special equipment do I need?

Sent from my iPhone

On Nov 10, 2012, at 3:19 PM, "Jono" <jonathan.yae...@gmail.com<mailto:jonathan.yae...@gmail.com>> wrote:

Put the PCBs in kernel mode and copy the ROM.  Simple.  No soldering.

On Friday, October 19, 2012 2:05:04 AM UTC-4, Tim Farren wrote:

Hello everyone. I have a drive that won't spin up. When powered on, you can hear nothing from the motor. Instead you hear noise as the heads attempt to travel over the non moving platters.

I know the motor isn't seized. It's a western digital 800BB drive. I tried a board from a similar drive and the motor works and the drive comes up but all blocks just timeout on the DDI. Upon inspection of the original drive's pcb, I see a chip that connects to the motor contacts which has developed a nice little bubble. I believe this chip is the problem.

Question: has anyone found a way to externally spin up the motor while leaving the original pcb attached to the drives internal head stack?  I tried attaching the pins from the good pcb to the drive while bending up the 4 pins on the original pcb. The drive seems like it tried to start, but then decided to stop trying, I suppose because the rest of that pcb is getting no feedback or additional signals from the IDE interface.

Can this be done?  I just need the drive to spin up, is there a way apart from desoldering and transplanting that motor controller chip?  I'm terrible at doing that. I've never been successful as I always botch the soldering job.

Thanks.

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