KIO2 12 volt regulator

[Elecraft mailing list]

HiMy KIO2 interface has stopped working.  Voltage checks indicated that the 5 volt regulator had 12 volts in and 12 volts out.  This is the VCC feed for the U1 processor.  So I can replace the regulator but would the processor have been damaged?  Should I just change both for general practice?
ThanksDon Zank AA9WP
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[Don Wilhelm]

Don,

Why not replace the regulator and cross your fingers?  If it works, all
is well.  There is no firmware on the KIO2, but the MAX1406 U1 may have
been damaged.

73,
Don W3FPR

On 11/4/2020 10:09 AM, Don Zank via Elecraft wrote:
> HiMy KIO2 interface has stopped working.  Voltage checks indicated that the 5 volt regulator had 12 volts in and 12 volts out.  This is the VCC feed for the U1 processor.  So I can replace the regulator but would the processor have been damaged?  Should I just change both for general practice?
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[Elecraft mailing list]

Change them both. Even if the unit “worked” ok if you didn’t replace U1, you would be just waiting for a failure.

Sent from my iPhone

> On Nov 4, 2020, at 10:11 AM, Don Zank via Elecraft <[hidden email]> wrote:
>
> HiMy KIO2 interface has stopped working.  Voltage checks indicated that the 5 volt regulator had 12 volts in and 12 volts out.  This is the VCC feed for the U1 processor.  So I can replace the regulator but would the processor have been damaged?  Should I just change both for general practice?
> ThanksDon Zank AA9WP
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
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> Please help support this email list: http://www.qsl.net/donate.html
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