K2 No current display

[Chris Meagher-3]

My K2 has recently been repaired after a polarity reversal of amp
connected to it blew out the bnc connector.
It works all OK, except that when I switch the display to show
Volts/current, the current stays on i0.00.
I have checked the current sense resistor voltage drop is OK for both
RX and TX, and the voltage is showing
at control board MCU pin 4 ( current sense input). (0.013 volts RX,
0.11 volts at 10W TX).

So at this point I'm stumped. Faulty MCU chip? Any advice on/off the
forum would be appreciated.

Chris VK2ACD

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[Don Wilhelm-4]

Chris,

With a voltage at U6 pin 4, an indication that does not follow the
voltage at pin 4 tells me that the U6 input was damaged.

73,
Don W3FPR

On 6/9/2012 12:14 AM, [hidden email] wrote:

> My K2 has recently been repaired after a polarity reversal of amp
> connected to it blew out the bnc connector.
> It works all OK, except that when I switch the display to show
> Volts/current, the current stays on i0.00.
> I have checked the current sense resistor voltage drop is OK for both
> RX and TX, and the voltage is showing
> at control board MCU pin 4 ( current sense input). (0.013 volts RX,
> 0.11 volts at 10W TX).
>
> So at this point I'm stumped. Faulty MCU chip? Any advice on/off the
> forum would be appreciated.
>
> Chris VK2ACD
>
> Email sent using Dodo Webmail
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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