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Thumb drive ids as SM3267AB.
http://forum.hddguru.com/viewtopic.php?f=10&t=40990		 Page 1 of 1
Author:  managerharry [ February 19th, 2021, 4:44 ]
Post subject:  Thumb drive ids as SM3267AB.
Received a damaged thumb drive from a customer. The USB port had been broken off and someone had clumsily attempted to solder it back on. Enclosure is gone so not sure of make / model. I cleaned it up and reattached the port properly. Traces all intact. It now gets power but the activity LED pulses slowly and it is assigned a drive letter but doesn't show any capacity and is not detected as a disk drive. USBDeview detects it as SM3267AB MEMORY BAR with Vendor ID 090C ProductID 3267. Dead controller? Damaged / missing resistor or cap? Worth trying to reflow NAND? Suggestions?

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Author:  Lardman [ February 19th, 2021, 5:13 ]
Post subject:  Re: Thumb drive ids as SM3267AB.
In the order id do it.

Clean up around the controller.
Rework the connections on controller - it's a weak design on the right hand side due to the PCB cut outs. Especially with connector damage.
Reflow the nand
Chip off.
Author:  HaQue [ February 19th, 2021, 9:21 ]
Post subject:  Re: Thumb drive ids as SM3267AB.
Detect as Memory Bar means it is only getting controller info, and cant see the NAND, or firmware is corrupt.
I agree with @Lardman, chip of is usually straight forward with these.

have a good look under a microscope at around 10x - 20x
Author:  fzabkar [ February 20th, 2021, 15:13 ]
Post subject:  Re: Thumb drive ids as SM3267AB.
I suspect that the "24HV" component may be an LDO regulator, perhaps +3.3V. I would confirm that it is OK.

The inductor would be part of the Vcore supply for the flash controller. I suspect it will be around 1.0V - 1.2V.
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