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timtim24
 Post subject: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 3:22 
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Joined: September 29th, 2010, 1:51
Posts: 2
Location: sydney
Hello,

I was wondering if someone could help me in identifying which chip I need to swap in order to get this old hard drive working.

I have been told for this board the rom program have been joined with the main chip, and only swapping the PCB is not enough.

I do not have you need to use a special equipment to read and rewrite the rom program as I am an individual.

Could I just swap the main chip from you original PCB to the donor PCB?
Can someone please point out which chips will have to be swapped. I am pretty smooth at soldering but need help in identifying the correct chip.


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File comment: Here are the two boards with matching numbers.
DSCF1476.JPG
DSCF1476.JPG [ 135.94 KiB | Viewed 7477 times ]
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arvika
 Post subject: Re: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 3:35 
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Joined: October 24th, 2009, 15:22
Posts: 917
Location: Poland
The biggest one, with M letter on top :)

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guru
 Post subject: Re: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 3:58 
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Joined: May 5th, 2004, 20:06
Posts: 2782
Location: England
search for TVS on this board and maybe, just maybe you will not have to do too much work

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timtim24
 Post subject: Re: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 7:08 
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Joined: September 29th, 2010, 1:51
Posts: 2
Location: sydney
The chip with the big M on it has TV10 and TV9 on the under side of the board. Is that it?

Can anyone direct us to a video or slide show of this kind of job being done. I could only see one that was relevant on youtube.

Thanks
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mips
 Post subject: Re: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 8:27 
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Joined: March 23rd, 2009, 12:41
Posts: 38
Location: South Africa
timtim24 wrote:
The chip with the big M on it has TV10 and TV9 on the under side of the board. Is that it?

Can anyone direct us to a video or slide show of this kind of job being done. I could only see one that was relevant on youtube.

Thanks


Post two clear pictures of the top & bottom of the board and we will tell you. If it's TVS related it's a simple fix.
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drc
 Post subject: Re: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 9:13 
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Joined: August 12th, 2008, 13:11
Posts: 3235
Location: USA
timtim24 wrote:
I am pretty smooth at soldering

I don't think that's going to be sufficient for this one

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quasimodo
 Post subject: Re: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 10:41 
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Joined: October 23rd, 2006, 8:56
Posts: 1336
drc wrote:
timtim24 wrote:
I am pretty smooth at soldering

I don't think that's going to be sufficient for this one


I concur, that MCU is a BGA chip, your soldering iron will be of little use.
Unless you have experience with BGA, it would be best to find DR person/company to re-program the new pcb for you. Alternatively you could try and locate an electronics shop with BGA capabilities to perform the transfer for you. However before going through all kinds of troubles and repair attempts, what seams to be the problem and why are you certain that it's an issue with the PCB?
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fzabkar
 Post subject: Re: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 20:08 
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Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia
timtim24 wrote:
I have been told for this board the rom program have been joined with the main chip, and only swapping the PCB is not enough.

The vacant location at U12 would normally be populated with an 8-pin serial EEPROM. However, in your case the ROM has been incorporated into the Marvell MCU immediately to the left of it.

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networkpc3000
 Post subject: Re: PCB Board- How to swap the main chip?
PostPosted: September 29th, 2010, 20:47 
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Joined: December 16th, 2007, 10:26
Posts: 1151
hi,
i can help you transfer FW into good PCB. please feel free to contact me by email or MSN if need help. or you can find out some mobile repair shop for swap MCU. it's easy jobs.

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