MultiDrive – free backup, clone & wipe disk utility from Atola Technology

Main » Forums home » Conventional hard drives

All times are UTC - 5 hours [ DST ]



Post new topic Reply to topic  Page 1 of 1
  [ 5 posts ] 
  Previous topic | Next topic 
Author Message
utdr
 Post subject: HDT725040VLA380 u5 and cpu?
PostPosted: May 14th, 2010, 17:43 
Offline

Joined: March 13th, 2007, 20:44
Posts: 39
Hi I have a Hitachi 400GB HDT725040VLA380 that is unresponsive. I can find no burnt components it simply does nothing. I have a donor on the way, my question is do i need to switch the cpu as well as the u5 eeprom? u7 is unpopulated.
Thanks, Ben


Attachments:
front.jpg
front.jpg [ 108.17 KiB | Viewed 3646 times ]
back.jpg
back.jpg [ 120.43 KiB | Viewed 3646 times ]
Top
 Profile  
 
fzabkar
 Post subject: Re: HDT725040VLA380 u5 and cpu?
PostPosted: May 15th, 2010, 3:55 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia
Can you measure the resistances of the two diodes near the legacy power connector, on each side of the "100 ME" coil?
Top
 Profile  
 
BlackST
 Post subject: Re: HDT725040VLA380 u5 and cpu?
PostPosted: May 15th, 2010, 10:18 
Offline

Joined: July 18th, 2006, 3:05
Posts: 7476
Location: ITALY
What diags you have? Pc3000 , SD, other?
Top
 Profile  
 
utdr
 Post subject: Re: HDT725040VLA380 u5 and cpu?
PostPosted: May 15th, 2010, 13:43 
Offline

Joined: March 13th, 2007, 20:44
Posts: 39
The diodes and coil are the first thing I suspected but they are fine. I am worried that the cpu is dead and that it has adaptive's on it. The drive is unresponsive and no discernible status makes it through the sata translator to the pc3k.
Thanks, Ben
Top
 Profile  
 
BlackST
 Post subject: Re: HDT725040VLA380 u5 and cpu?
PostPosted: May 15th, 2010, 14:28 
Offline

Joined: July 18th, 2006, 3:05
Posts: 7476
Location: ITALY
"the cpu is dead and that it has adaptive's on it" :shock:

Put UDMA to work and use the relative know-how, please !

If the PCB is completely dead, you can make another identical PCB work for you, eventually.

P.S. don't get confused about microcode, adaptives and... "unique stuff".
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 5 posts ] 

Main » Forums home » Conventional hard drives

All times are UTC - 5 hours [ DST ]

Who is online

Users browsing this forum: Google [Bot] and 62 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Switch to mobile style
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group