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 Post subject: Flashpen - Bended on PC tower
PostPosted: April 14th, 2020, 11:48 
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Hi guys,

I got this USB 128GB flash drive, was working until customer bended it while moving PC tower. I've tried to check connection and solder a cable on PCB but no result. USB is not detected at all, nothing, I wonder if it could be a fuse but I don't see anything reference to fuse on PCB. Any Idea ?

Thanks
Sam


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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 14th, 2020, 12:02 
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Location: Phoenix, AZ USA
Is the bend in the logic board real?
Or is it the way the picture is taken?
If the board is that bent in real life, you will need to do a chip off.

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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 14th, 2020, 12:49 
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ddrecovery wrote:
Is the bend in the logic board real?
Or is it the way the picture is taken?
If the board is that bent in real life, you will need to do a chip off.

sorry, there's now visible bend on PCB, it's the magnifying glass effect.


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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 14th, 2020, 13:03 
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If its been bent, it is unlikely to be just a fuse which has blown. I would suggest checking each of the legs on the controller and NAND chips for a bad connection. Test components such as caps for shorts. Many times when the board has been bent the short can be within the lamination layers of the board so its impossible to trace. A chip-off may be your only option if you cant trace the issue.

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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 14th, 2020, 15:08 
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Joined: October 24th, 2009, 15:22
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Location: Poland
Check oscillator.

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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 15th, 2020, 11:39 
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Joined: December 4th, 2012, 1:35
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Location: Adelaide, Australia
Also, check under a 10x microscope. easy to miss breaks with just magnifying glass.


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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 15th, 2020, 18:11 
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Location: Australia
https://opendevices.ru/wp-content/uploads/2011/11/USBest_UT165.pdf

R12 appears to be the "fuse".

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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 16th, 2020, 14:46 
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fzabkar wrote:

This is awesome, thank you. I'll give it a try.


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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 18th, 2020, 2:39 
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samstown wrote:
fzabkar wrote:

This is awesome, thank you. I'll give it a try.

R12 didn't help. I'll go for chips off.Thank you all for your help.


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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 18th, 2020, 3:21 
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Joined: October 24th, 2009, 15:22
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Location: Poland
Did you check oscillator?

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 Post subject: Re: Flashpen - Bended on PC tower
PostPosted: April 18th, 2020, 6:40 
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fzabkar wrote:


Hello Frank ,
Do You Have Other Controllers Datasheets Also ,Any Websites You Can Share For Such Content

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