Third Party > Repairing and Upgrading Rockbox Capable Players

Cowon iaudio 7 not recognized as an USB device anymore

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Darko:
I have Creative Zen V Plus that has simmilar issue, it is not recognised under Windows (keeps constantly refreshing Device Manager) and very poorly charges battery but after a while reports "Overheating, shutting down" message. In Ubuntu it reports this:


--- Code: ---[  835.512022] usb 2-1: new full speed USB device number 6 using ohci_hcd
[  835.692014] usb 2-1: device descriptor read/64, error -62
[  835.976016] usb 2-1: device descriptor read/64, error -62
[  836.256017] usb 2-1: new full speed USB device number 7 using ohci_hcd
[  836.436024] usb 2-1: device descriptor read/64, error -62
[  836.720018] usb 2-1: device descriptor read/64, error -62
[  837.000030] usb 2-1: new full speed USB device number 8 using ohci_hcd
[  837.408027] usb 2-1: device not accepting address 8, error -62
[  837.584017] usb 2-1: new full speed USB device number 9 using ohci_hcd
[  837.992014] usb 2-1: device not accepting address 9, error -62
[  837.992076] hub 2-0:1.0: unable to enumerate USB device on port 1

--- End code ---

There are some resources on this error and success stories by disabling/switching ehci/ohci modes (didn't really have time to investigate), but my theory is that the USB controller inside player is fryed up. I opened it and soldered two wires directly from battery so I am able to charge it manually. The only way to put new music on it is via analog Line-In.

yoloosis:
On another forum one guy sent its Iaudio back to Cowon. They answered that the mainboard and memory need to be replaced, unfortunately they don't do it anymore, so basically the player is dead…

Do you think the Iaudio7 USB controller can be replaced by myself ?

Darko:
Well, if you replace "mainboard", I assume it already containes new memory chip on it, so it would be either mainboard or the chip. Or maybe they have mainboards with blank places for memory chips so you can put different sized NAND? If you can find memory chip then you could replace it, but not by yourself for sure. You need to find electronic assembly/re-assembly service company or even, maybe, a good mobile phone service who would do this for you. You need SMD station to unsolder old chip and put back new one in a very precise way. Manual soldering is out of the question. This is why I tend to dislike miniaturisation of electronic components lately, do-it-yourself repair is getting harder with every generation of smaller ICs. On the other hand, this adventure will probably cost the same or even more than to buy used iAudio on eBay. Cheapest option would be to find another broken iAudio that has a good mainboard and that you could replace by yourself.

yoloosis:
Sadly, it looks like I'm going to invest in a cheaper and hopefully soon to be Rockbox friendly Sansa Clip Zip…

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