KW 24 USB unknown device

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mhserrano
Posts: 45
Joined: Tue Dec 11, 2007 8:24 pm
Location: Torres Vedras, Portugal

KW 24 USB unknown device

Post by mhserrano »

Hello again!

I am utilizing a KW24 to drive an 8X8 key matrix.

When connecting the PCB with an USB cable to Windows 7 SP1, it appears the message on Device Manager

Device Unknown, windows interrupted the device, Code 43

I have tried several times to update drivers, intall again and so on.

Any idea

Kind Regards

Marco
Guido Körber
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Re: KW 24 USB unknown device

Post by Guido Körber »

Does it work an another machine?

If not probably the data lines are switched.
mhserrano
Posts: 45
Joined: Tue Dec 11, 2007 8:24 pm
Location: Torres Vedras, Portugal

Re: KW 24 USB unknown device

Post by mhserrano »

Thanks for your answer,

It does not work in any computer.

I have changed the USB port and do all sort of changes and it does not work.

Besides, the chip seem to be hot when the PCB is connected.

I think it is damaged.
Guido Körber
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Re: KW 24 USB unknown device

Post by Guido Körber »

Likely it is defect, the chip should not get warm at all
mhserrano
Posts: 45
Joined: Tue Dec 11, 2007 8:24 pm
Location: Torres Vedras, Portugal

Re: KW 24 USB unknown device

Post by mhserrano »

Yes of course, I work perfectly fine with an IOW40 PCB, and never get warm.

Is it possible to change this product?
Guido Körber
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Re: KW 24 USB unknown device

Post by Guido Körber »

Usually not. All parts are tested before we ship them. And we can not verify how the parts are handeled after they have been shipped.
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