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 Post subject: Maxwell 4GB Flash Physical Damage
PostPosted: September 9th, 2021, 20:55 
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Joined: March 24th, 2010, 21:08
Posts: 100
Location: California
Trying to recover data from a Maxwell 4GB thumbdrive that had the USB port broken off. I believe it's this model which is rather bizarrely still for sale on Amazon:
https://www.amazon.com/Maxell-Flash-Dri ... B002USOE34

Usually just soldering some trace wires to reattach the connector does the trick, but I've done that and the drive gets power but is listed in USBDeview as USB DISK 30X USB Device with no storage capacity detected. Contemplating ordering another drive and doing a chip off swap but I see mention of password protection in the product listing so not sure whether it would work? Or maybe there's some other component that could be replaced to fix it? I also tried touching up all the solder points on the memory chip to no effect.


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 Post subject: Re: Maxwell 4GB Flash Physical Damage
PostPosted: September 9th, 2021, 22:29 
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Joined: September 8th, 2009, 18:21
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Location: Australia
What does Chip Genius report?

Can you measure 3.3V across the bypass capacitors around the NAND?

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 Post subject: Re: Maxwell 4GB Flash Physical Damage
PostPosted: September 10th, 2021, 2:44 
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Joined: November 7th, 2020, 5:31
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Location: The_UK
Flip the board over so we can check the controller.

It's difficult to see through the glare on the photo, can you clean up the flux a bit and show us a closer view of your connections. Was that the original usb plug? Anything getting hot? Current draw?

If this is a customers data, I think you may want to reconsider trying to swap the tsop in house.

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 Post subject: Re: Maxwell 4GB Flash Physical Damage
PostPosted: September 10th, 2021, 15:02 
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Joined: March 24th, 2010, 21:08
Posts: 100
Location: California
Bypass caps do show 3.3v. This is the original USB port.

Description: [E:]USB Mass Storage Device(USB DISK 30X)
Device Type: Mass Storage Device

Chip Genius Report:
Protocal Version: USB 2.00
Current Speed: High Speed
Max Current: 100mA

USB Device ID: VID = 13FE PID = 1D00
Serial Number: 000000000000

Device Name: USB DISK 30X
Device Revision: 0110

Product Model: USB DISK 30X
Product Revision: 1.00

Controller Vendor: Phison
Controller Part-Number: PS2251-67(PS2267) - F/W 06.03.34 [2013-01-31]
Flash ID code: 98DE98927257 - Toshiba TC58NVG6T2HTA00 [TLC-8K]


Last edited by managerharry on September 10th, 2021, 15:09, edited 2 times in total.

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 Post subject: Re: Maxwell 4GB Flash Physical Damage
PostPosted: September 10th, 2021, 15:05 
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Joined: March 24th, 2010, 21:08
Posts: 100
Location: California
Controller pic


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 Post subject: Re: Maxwell 4GB Flash Physical Damage
PostPosted: September 10th, 2021, 19:01 
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Joined: March 24th, 2010, 21:08
Posts: 100
Location: California
Close up


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 Post subject: Re: Maxwell 4GB Flash Physical Damage
PostPosted: September 21st, 2021, 17:39 
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Joined: March 24th, 2010, 21:08
Posts: 100
Location: California
*bump* :wink:


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 Post subject: Re: Maxwell 4GB Flash Physical Damage
PostPosted: September 21st, 2021, 17:55 
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Joined: September 8th, 2009, 18:21
Posts: 13582
Location: Australia
Measure Vcc and Vccq at the NAND.

Measure the voltage across R1 (1R5, 1.5 ohm resistor). The voltage drop should tell you the current draw.

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