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
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