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WANTED: Seagate 7200.8 400gb HDD Contoller PCB http://forum.hddguru.com/viewtopic.php?f=26&t=40840 |
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Author: | Waltheof [ January 15th, 2021, 11:43 ] |
Post subject: | WANTED: Seagate 7200.8 400gb HDD Contoller PCB |
Hi, All, I have a Seagate 7200.8 that is not spinning. I have continuity checked the diodes on the board, and none are shorting - and that is about the limit of my expertise. The power is on; the head tries to 'track' on the platter, but is prevented by the air-operated 'safety-catch', which appears to operated by the airflow from the spinning disks, and so it just click-click-clicks against the catch. The heads are moveable, and so is the platter-stack, so nothing is seized. What I want to do is to swap out the PCB (where I believe the problem to be) for a replacement so that I can recover the data. To that end, does anyone one out there have (or know where I might obtain) a controller PCB for; Seagate Barracuda 7200.8 400GB Model no. ST3400832A Part no. 9Y7485-066 Firm ware 3.03 Date code 06135 Site Code TK Any help would be really appreciated. I know it is an old HDD (and would normally be written off), however there are many 'brownie-points' to be earned with a very cute girl Cheers for your time Waltheof |
Author: | pepe [ January 15th, 2021, 13:12 ] |
Post subject: | Re: WANTED: Seagate 7200.8 400gb HDD Contoller PCB |
99% it is not a pcb problem. More probably heads are bad and they do not kick the latch, rather just try to seek and then park, which is a kind of clicking. Have you disassembled the HDA? pepe |
Author: | Waltheof [ January 17th, 2021, 6:41 ] |
Post subject: | Re: WANTED: Seagate 7200.8 400gb HDD Contoller PCB |
Hi, Pepe, I'm not quite sure what you mean by "kick the latch". The heads sit inboard (on the inside circumference) on the platter, and are physically incapable of opening the air-catch which the pivot end of the head-arm sits against. There is an air-channel alongside the platter which directs air onto the air-catch which the releases the head-arm. As a mechanical engineer I can see how the air-catch works, and understand that it is there to secure the head-arm in the parked position if the platter is not spinning. As I said in my original post - the platters do not spin-up when power is applied; which suggests an electronic problem rather than a mechanical one. I appreciate your time in thinking about my problem, and if you have any suggestions I'd be grateful. All the best. Cheers |
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