Hello,
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Replacing motor controller chip is much more though and it doesn't give you any assurance of getting a working PCB, because could be also other damaged components (mosfet, diodes, capacitors, etc).
Taking a look to this TQFP-64 chip it isn't much of a hassle with a hot-air station to replace, i have already replaced several quad-packs on routers, motherboards, etc. As for the other components they seem fine on the board (no blacks, melts), what concerns me is if the RAM, Controller and EEPROM have survived, I do not know what is the circuit design to determine if they are "protected" by some circuitry before them. And how come if this IC is dead, can I guarantee that also the
U12 25Cxxx isn't dead too (being also a
5V device)?
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@vami, here is one supplier who includes a firmware transfer (U12) in the price:
The drive & it's contents just doesn't worth that much; I've got the drive for 30 EUR and I'm not willing to invest more than 10 EUR to fix it, the data is of no importance (Linux distros installations) I just don't want to throw away a mechanically good drive. Perhaps I'll buy some donor with a good motor chip for few bucks and try to replace the motor controller, or in the trash can it goes...
Any insight on the circuit design and workings are welcome.