K1 E42 error msg

[Rick Whitworth]

I have an older K1 that has been working fine but now i get an E42 error msg which the manual says is a vfo issue. Visual inspection show nothing obvious. has anyone had this problem before .i hope to save some time
with any suggestions i can get here first.

thanks

Rick ...W4BDI

[Don Wilhelm]

Rick,

Yes, E42 says that the MCU is not detecting a signal from the VFO.

You can try re-flowing the soldering in the VFO area.
If that does not restore proper operation, then more in-depth
troubleshooting is required.

Try DC voltage checks at Q8 for starters - the drain should be at 6
volts, and the source should be less than 1 volt.  The gate should be a
small negative voltage if Q8 is oscillating.

If those values are OK, then it may be that the buffer (Q8) is not
sending the VFO frequency to the MCU.

73,
Don W3FPR

On 6/10/2016 9:20 PM, Rick Whitworth via Elecraft wrote:

> I have an older K1 that has been working fine but now i get an E42 error msg
> which the manual says is a vfo issue. Visual inspection show nothing
> obvious. has anyone had this problem before .i hope to save some time
> with any suggestions i can get here first.
>
> thanks
>
> Rick ...W4BDI
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/K1-E42-error-msg-tp7618759.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>

______________________________________________________________
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
Message delivered to [hidden email]