hey guys,i found a few flash drives in my office that were not working. i opened the casing of 1 of them, a kingston data traveler with 4 gb memory . i found was that a the drive was dead short and the flash io controller ic and flash memory ic were not getting any voltage though the 4 usb connector pins showed 5 volts.i the saw three inductor coils 2 of them were working fine i checked this by the continuity test by using a multimeter the third inductor however had developed resistance which was the cause of the shorting, all i did was removed the inductor and bridged the empty pads on the board with solder,and voila it started working.................................................................
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Last edited by linston; 10-26-2011, 06:31 AM. -
Re: usb flash drive repair
Congrats! I've fixed some flash drive just by resoldering the 5v and ground solder joints. Users break it a lot!
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Re: usb flash drive repair
I think you need to correct some text (I found that the drive was dead short there was no voltage at the two ic's) should read you found open circuit between the points measured, when you removed the coil and bridged the contacts you connected the input voltage directly to the ic's.Originally posted by linston View Post
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Re: usb flash drive repair
I found they fail (sometimes intermittently) is because the solder joints on the USB connector fail from mild forces when inserting and removing.My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.Comment
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Re: usb flash drive repair
Well, that's not really surprising. The Chinese "engineers" behind cheap PSUs have discovered quite a long time ago that all inductors are indeed uselessOriginally posted by linston
. It's a secret discovery, though, so don't tell anyone else .
Congrats on the fix, by the way
. 4 GB is pretty decent.
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