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Another Samsung HD322GJ Problem

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mikail13

Post subject: Another Samsung HD322GJ Problem

Posted: September 11th, 2016, 3:53

Joined: December 14th, 2013, 17:10
Posts: 210
Location: istanbul

i recovered app 10 HD322GJ that all of PCB faulty

it doesn't spin. And there is no visible error on PCB.

TVS's O.K.

What should I suspect part?

Attachments:

HD322gj pcb.jpg [ 1.38 MiB | Viewed 11703 times ]

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mikail13

Post subject: Re: Another Samsung HD322GJ Problem

Posted: September 11th, 2016, 12:19

Joined: December 14th, 2013, 17:10
Posts: 210
Location: istanbul

Thanks for reply.

i desolder rom chip from faulty pcb as you can see...
i recovered disks via rom transfer. Disk spins normally.

i 've five HD322GJ that needs pcb for this common problem...

Maybe main chip or easy problem?

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fzabkar

Post subject: Re: Another Samsung HD322GJ Problem

Posted: September 11th, 2016, 15:46

Joined: September 8th, 2009, 18:21
Posts: 17092
Location: Australia

Measure the Vcore, Vio and Vneg voltages:

http://www.users.on.net/~fzabkar/HDD/HD103SJ_regs.jpg

_________________
A backup a day keeps DR away.

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mikail13

Post subject: Re: Another Samsung HD322GJ Problem

Posted: June 18th, 2017, 7:55

Joined: December 14th, 2013, 17:10
Posts: 210
Location: istanbul

fzabkar wrote:

Measure the Vcore, Vio and Vneg voltages:

http://www.users.on.net/~fzabkar/HDD/HD103SJ_regs.jpg

thanx for reply.

i have 3 broken boards of hd322gj.

at diode mod

vio(up) vio (down) Vneg

A 0,646V 0,082V 0,180V

B 0,635V 0,068V 0.180V

C 0,685V 0,108V 0,190V

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fzabkar

Post subject: Re: Another Samsung HD322GJ Problem

Posted: June 18th, 2017, 15:05

Joined: September 8th, 2009, 18:21
Posts: 17092
Location: Australia

bad motor controllers

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A backup a day keeps DR away.

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gps31

Post subject: Re: Another Samsung HD322GJ Problem

Posted: June 19th, 2017, 2:44

Joined: January 18th, 2010, 23:53
Posts: 346
Location: india

ok what are the expected value?

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fzabkar

Post subject: Re: Another Samsung HD322GJ Problem

Posted: June 19th, 2017, 3:10

Joined: September 8th, 2009, 18:21
Posts: 17092
Location: Australia

2.5v, 1.2v (?) and -5v

confirm 12v and 5v at diodes

_________________
A backup a day keeps DR away.

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Amarbir[CDR-Labs]

Post subject: Re: Another Samsung HD322GJ Problem

Posted: June 20th, 2017, 13:30

Joined: August 15th, 2006, 3:01
Posts: 3522
Location: CDRLabs @ Chandigarh [ India ]

Well,
Sometimes The Zero Ohm Resistor in Series From Main Supply is Open ,Please Check That Too ,Very Common In These PCB 's

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Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com

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pepe

Post subject: Re: Another Samsung HD322GJ Problem

Posted: June 28th, 2017, 9:58

Joined: October 3rd, 2005, 0:40
Posts: 4779
Location: Hungary

he probably measured voltages without supply, in diode mode across the tvses, so it is not very meaningful

Quote:

at diode mod

vio(up) vio (down) Vneg

A 0,646V 0,082V 0,180V

B 0,635V 0,068V 0.180V

C 0,685V 0,108V 0,190V

_________________
Adatmentés - Data recovery

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