Jeremy,
5.029 volts at U4 pin 13 means that the PLL synthesizer IC is working.
Remember that the manual voltages are for a properly working K2 that has
the PLL IC in lock with the VFO frequency. Your voltage only indicates
an out of lock condition.
What is the R30 voltage now with that 5.029 volts at U4 pin 13? You
should now have some voltage there. Can you adjust that voltage with
L30? If so, you should now be able to get everything within the normal
range.
If you are still seeing zero volts at the left side of R30, then U6B or
its components is at fault, not U4.
73,
Don W3FPR
On 2/3/2013 8:31 PM, JeremyJones wrote:
So I really thing that U4 is faulty. It's putting out 5.029V on pin13 when
that should only be 4V. All the components surrounding it seem to have the
correct voltages according to the manual. I think I'll replace that and see
how things look after.
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