Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
November 8th, 2008, 18:04
Drive does not spin up.
Zero resistance across this component (Upper left, circled in red). The drive spins up OK with a different Maxtor (PATA) board attached but the boards are not compatible.

I assume with a fair amount of certainty that this is the TVS and the problem, but it is probably better to ask
November 8th, 2008, 18:47
hello,
check PM
November 8th, 2008, 20:15
Those model often suffer from failed Motor controler L7250 1.2
November 10th, 2008, 11:05
Do you have the use of a multimeter?
September 21st, 2010, 1:08
hddguy wrote:Do you have the use of a multimeter?
Yes.
And after all this time, the drive is still sitting on a shelf here gathering dust, strangely enough. I guess I had forgotten it.
September 21st, 2010, 4:05
This model have no TVS.
September 21st, 2010, 5:00
Your photo is not very clear, but if the following PCB is similar, then there is a 12V TVS diode marked "BUX" in the top LH corner, exactly where you have circled it:
http://www.besthddparts.com/us/pic/040118900-1.JPGIf there is no other damage, the drive will work without the diode, but there will no longer be any overvoltage protection on the +12V supply. Be sure your PSU is OK.
If, for continued protection, you wish to replace the diode, you can obtain an SMBJ12A from Farnell, Mouser, Digikey.
Good luck.
September 21st, 2010, 12:10
Fzabkar is right, this is sata board, and i have not seen the picture.

Anyway, never seen any TVS issue on this model before, all have burned the power fet and/or the VCD, and sometimes the MCU too.
Janos
September 21st, 2010, 12:24
And FUBAR preamp too... "zzzinng.... zzziiinng..." at power on ....
September 21st, 2010, 12:44
N.C. wrote:Anyway, never seen any TVS issue on this model before ...
A TVS fails due to external reasons, eg an overvoltage as a consequence of a PSU failure or user error. Therefore your comment makes no sense.
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