November 1st, 2023, 13:59
November 2nd, 2023, 3:59
November 2nd, 2023, 9:06
pclab wrote:Maybe I'm wrong, but if I remember this correctly, ROM should be able to be read even with motor controller burned.
If not, ACElab have several tutorial on how to recover ROM like this one: https://blog.acelab.eu.com/pc-3000-hdd- ... -mode.html
November 2nd, 2023, 12:51
pclab wrote:Maybe I'm wrong, but if I remember this correctly, ROM should be able to be read even with motor controller burned.l
November 2nd, 2023, 18:32
November 3rd, 2023, 2:44
fzabkar wrote:pclab wrote:Maybe I'm wrong, but if I remember this correctly, ROM should be able to be read even with motor controller burned.l
The motor controller generates the Vcore and Vio supplies for the MCU. If the 5V side of the chip is damaged, then no VCore or Vio, so no MCU, ergo no ROM. If you are smart, you could patch external supplies into the Vcore and Vio test points, but then you would need to ensure that POK was active, otherwise the MCU would be stuck in the reset state.
This is the OP's PCB:
https://www.hddoracle.com/download/file.php?id=10234&mode=view
In this case Vcore and Vio would be absent.
November 3rd, 2023, 2:46
michael chiklis wrote:I would try to fix the pcb by replacing motor ic.
If you see burnt tracks and pads, you can rebuild them with solder lugs
https://aliexpress.com/item/1005004746483452.html
November 3rd, 2023, 3:54
fzabkar wrote:pclab wrote:Maybe I'm wrong, but if I remember this correctly, ROM should be able to be read even with motor controller burned.l
The motor controller generates the Vcore and Vio supplies for the MCU. If the 5V side of the chip is damaged, then no VCore or Vio, so no MCU, ergo no ROM. If you are smart, you could patch external supplies into the Vcore and Vio test points, but then you would need to ensure that POK was active, otherwise the MCU would be stuck in the reset state.
This is the OP's PCB:
https://www.hddoracle.com/download/file.php?id=10234&mode=view
In this case Vcore and Vio would be absent.
November 4th, 2023, 0:07
fzabkar wrote:pclab wrote:Maybe I'm wrong, but if I remember this correctly, ROM should be able to be read even with motor controller burned.l
The motor controller generates the Vcore and Vio supplies for the MCU. If the 5V side of the chip is damaged, then no VCore or Vio, so no MCU, ergo no ROM. If you are smart, you could patch external supplies into the Vcore and Vio test points, but then you would need to ensure that POK was active, otherwise the MCU would be stuck in the reset state.
This is the OP's PCB:
https://www.hddoracle.com/download/file.php?id=10234&mode=view
In this case Vcore and Vio would be absent.
May 4th, 2024, 7:57
May 4th, 2024, 16:53
May 5th, 2024, 6:19
fzabkar wrote:Did any of the DR companies swap or test the heads? There is always a risk of preamp damage when the drive has been overvolted on the 5V side.
May 5th, 2024, 14:27
May 5th, 2024, 20:07
fzabkar wrote:You can measure the resistance between ground and each of the preamp supply pins. Do this with the PCB on and off the drive. This will tell you if the preamp is damaged.
May 8th, 2024, 3:12
May 8th, 2024, 3:37
northwind wrote:What is so difficult about this case that has caused 'many DR companies' to fail?
It's called hotswap.
May 8th, 2024, 4:09
May 8th, 2024, 5:02
MISU wrote: and hot swap is not supported or working for this model they said.
May 8th, 2024, 23:22
northwind wrote:MISU wrote: and hot swap is not supported or working for this model they said.
This is probably the most ridiculous thing I've read in a very long time.
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