The drive is detected by the OS but it cannot report anything. Hello all, I did something stupid in my hurry and i killed a working laptop hard drive by swapping accidentally the 12V and 5V power lines. Now you see how platters packet has room for heads – platters laying on spacer rings. We going to remove top dumper. The VCM may also be disabled without disabling spindle operation idle mode. Replacing motor controller chip is much more though and it doesn’t give you any assurance of getting a working PCB, because could be also other damaged components mosfet, diodes, capacitors, etc.
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HDD from Inside: Hard Drive Main Parts
So after that the spindle doesn’t rotate, but clicking sounds from the motogs Any insight on the circuit design and workings are welcome. Usually dumpers made of aluminum or plastic.
ABS makes slider fly almost parallel to the platter’s surface. If any particle goes under the slider it could immediately overheat because of friction the heads and 12g them that’s why clean air inside HDA is so important. The heater can heat the gimbal – special joint which connects slider to HGA, the gimbal made from two stripes of different alloys with different thermal expansion. That’s how the breath filter looks. So I’ve inspected the PCB for some burns and fries, but I didn’t see anything of this like burns on didodes, capacitors or resistorsjust a small black dot unevenly aligned on the WD NAUTILUS chip, spimdle during my research i found out that it is a motor control chip.
Thank you for the replies, I’ll think about it. HDDs use very strong Neodymium magnets.
If you have tools as WDMarvel you can even adapt donor pcb without swapping rom physically. There is the other HSA stopper.
The VCM may also be disabled without disabling spindle operation motora mode. Spindle Motor Controller State Diagram. Flash chip stores part of the drive’s firmware. This fellow is the most power consumption chip on PCB. To clean air immediately a drive uses Recirculation filter. Spindle Motor Stuck Time – Tstuck ms.
When TVS diode detects power surge it fries itself and creates short circuit between power connector and ground. VCM controller immediately parks heads and sometimes spins down the drive.
Also i don’t do clean room work so if heads are gone or pre-amp are gone you will have to find someone else like member drHDD that does morors room work very cheap to do the head swap. It theoretically should protect the driver from further damage but practically it doesn’t, so don’t drop you drive – it wouldn’t survive. Finally we are going to shake out the rest of the notors from HDA and see the base That’s how the breath filter looks.
HDD is a precision mechanism and in order to work it requires very clean air inside. Inductive flyback clamp spinlde emergency head retract power supply. Heads flying height on modern HDDs is about nanometers. The drive is detected by the OS but it cannot report anything.
L 데이터시트(PDF) – STMicroelectronics
You would need to confirm whether the preamp on the spindoe inside the HDA is damaged. If motor controller chip is burned it’s better to find a new pcb and swap ic U HSA stoppers limit HSA movements, so heads wouldn’t bang on the platters clamp and on the other side they wouldn’t just fly off the platters. Basically it protects should, at least heads from unwanted movements mootors HSA is in parking area. The device is designed for 5V disk drive application requiring up to 2.
L Datasheet(PDF) – STMicroelectronics, 5V & 12V SPINDLE AND VCM MOTORS DRIVER
Let’s see the breath filter closer. Switch to mobile style.
Perhaps I’ll buy some donor with a good motor chip for few bucks and try to replace the motor controller, or in the trash can it goes Aluminum dumpers better for spibdle air inside HDA. The original board number is 60 Rev A and the donor is 59 Rev P.