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 Post subject: Maxtor DiamondMax Plus 9 80GB PCB Replacement
PostPosted: April 1st, 2017, 16:47 
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Joined: April 1st, 2017, 16:30
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Location: Eastern WA
New here so sorry if I do something wrong, but I'm looking on information to get a PCB for my DiamondMax Plus 9. I searched this on eBay, but I was unsure if any of these would work for a replacement. I've posted a couple pictures of the drive. Any help would be greatly appreciated. Thank you!

In case anyone is wondering, the drive don't spin and the IC for driving the spindle gets incredibly hot, so I figure I probably fried the chip somehow.


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 Post subject: Re: Maxtor DiamondMax Plus 9 80GB PCB Replacement
PostPosted: April 1st, 2017, 21:07 
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Joined: September 8th, 2009, 18:21
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Does the chip still get hot when the PCB is off the drive?

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 Post subject: Re: Maxtor DiamondMax Plus 9 80GB PCB Replacement
PostPosted: April 1st, 2017, 21:32 
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fzabkar wrote:
Does the chip still get hot when the PCB is off the drive?


It does.


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 Post subject: Re: Maxtor DiamondMax Plus 9 80GB PCB Replacement
PostPosted: April 1st, 2017, 21:39 
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I believe this means that the chip is dead. You might like to measure the resistances between each pair of motor terminals (at the motor). The resistance between the common terminal and each of the 3 phases should be half the phase-to-phase resistance. Expect to see values in the low ohms range.

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 Post subject: Re: Maxtor DiamondMax Plus 9 80GB PCB Replacement
PostPosted: April 2nd, 2017, 9:33 
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It's a common failure.

Easiest to replace the PCB. Match the sticker near the power connector.

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 Post subject: Re: Maxtor DiamondMax Plus 9 80GB PCB Replacement
PostPosted: April 2nd, 2017, 16:12 
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PCB layout - Maxtor DiamondMax Plus 9 ATA/133:
http://www.hddoracle.com/viewtopic.php?f=112&t=117

Here are various oscillograms by "NazYura":
http://nazyura.hardw.net/000004.htm

Servo Frame:
http://nazyura.hardw.net/ServMark.jpg

Motor Good:
http://nazyura.hardw.net/MotGood.jpg

Motor Bad:
http://nazyura.hardw.net/MotoBad.jpg

VCM:
http://nazyura.hardw.net/VCMSound.jpg

VCM Sound:
http://nazyura.hardw.net/VCMSound.wav

NazYura's work would suggest that the motor is a possible cause of failure.

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 Post subject: Re: Maxtor DiamondMax Plus 9 80GB PCB Replacement
PostPosted: April 6th, 2017, 17:35 
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Joined: April 1st, 2017, 16:30
Posts: 3
Location: Eastern WA
fzabkar wrote:
PCB layout - Maxtor DiamondMax Plus 9 ATA/133:
http://www.hddoracle.com/viewtopic.php?f=112&t=117

Here are various oscillograms by "NazYura":
http://nazyura.hardw.net/000004.htm

Servo Frame:
http://nazyura.hardw.net/ServMark.jpg

Motor Good:
http://nazyura.hardw.net/MotGood.jpg

Motor Bad:
http://nazyura.hardw.net/MotoBad.jpg

VCM:
http://nazyura.hardw.net/VCMSound.jpg

VCM Sound:
http://nazyura.hardw.net/VCMSound.wav

NazYura's work would suggest that the motor is a possible cause of failure.


Could I check that by running 5/12V straight to the motor? Also, how do I know which terminal is common?


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 Post subject: Re: Maxtor DiamondMax Plus 9 80GB PCB Replacement
PostPosted: April 6th, 2017, 18:42 
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Joined: September 8th, 2009, 18:21
Posts: 9752
Location: Australia
The motor's 3 phases need to be sequentially pulsed. You can't simply connect power to them.

Measure the resistances between each pair of terminals. Your results will tell you which terminal is the common. In any case all you are looking for is a reading which does not match the others.

By way of example, see the spindle motor section of the following article:

http://www.users.on.net/~fzabkar/HDD/Tu ... 0411N.html

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