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 Post subject: Samsung HD502HJ - demaged ROM finding donor PCB
PostPosted: October 13th, 2014, 9:37 
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Joined: February 23rd, 2012, 8:57
Posts: 19
Location: Poland
Hello!

I've got a 500GB Samsung HD502HJ with burned transil 6V8A,
(visually transil looks ok, but was shorted - tested by multimeter).
I have changed broken transil and tried to run HDD - nothing happened - no spin,
so I swapped ROM to donor PCB, also nothing happened.

In my opinion the ROM is dead.
Is there any possibility to find donor PCB with the same content of ROM?
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fzabkar
 Post subject: Re: Samsung HD502HJ - demaged ROM finding donor PCB
PostPosted: October 13th, 2014, 15:11 
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Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia
Did you check the zero-ohm resistor on the original PCB?

http://www.users.on.net/~fzabkar/HDD/HD103SJ_TVS_2.jpg

Do you have any way of reading the ROM? Perhaps it was damaged during the transfer.

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USER
 Post subject: Re: Samsung HD502HJ - demaged ROM finding donor PCB
PostPosted: October 14th, 2014, 5:57 
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Joined: February 23rd, 2012, 8:57
Posts: 19
Location: Poland
zero - ohm resistor is OK - conducts.
ROM was transferred under temp. control on BGA rework station.
ROM from donor PCB was soldered back, donor drive is still alive.
I will try to read ROM in some programmer.
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fzabkar
 Post subject: Re: Samsung HD502HJ - demaged ROM finding donor PCB
PostPosted: October 14th, 2014, 15:42 
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Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia
Does the donor PCB with donor ROM spin up the patient HDD?

Can you get a terminal log?

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USER
 Post subject: Re: Samsung HD502HJ - demaged ROM finding donor PCB
PostPosted: October 18th, 2014, 9:50 
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Joined: February 23rd, 2012, 8:57
Posts: 19
Location: Poland
Yes it does, patient HDD spin up with donor PCB + donor ROM.
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fzabkar
 Post subject: Re: Samsung HD502HJ - demaged ROM finding donor PCB
PostPosted: October 18th, 2014, 18:05 
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Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia
How to connect a terminal cable on a Samsung drive:
http://www.alexsoft.org/viewtopic.php?f=116&t=189

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USER
 Post subject: Re: Samsung HD502HJ - demaged ROM finding donor PCB
PostPosted: November 22nd, 2014, 8:28 
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Joined: February 23rd, 2012, 8:57
Posts: 19
Location: Poland
Problem solved
I found donor with compatible ROM - only PCB swap.


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