[Elecraft] KPA100 First tests (p 22)

[MARY HAYS CARNEY]

Time to add some extra kick to my K2-10; but, of course, problems arise along the way:
 
I find that U1 pin 2 to ground is only 5 kohms rather than > 10K.  I can find no  solder bridges or misplaced components.
  Resistors R24 and RP1 show the correct values.  Should I suspect that Q10 is shorted?  Other pins on U1 give correct resistances.
 
U4, pin 8 shows a resistance of only about 2.8K rather than the expected >10K.  (As directed, the +ve lead of the meter is on pin 8, -ve lead to ground.)  The circuit diagram suggests that this is to be expected since the measurement is made through two forward-biased diodes (D7 and D8) to ground.  Reversing the meter leads gives the expected high value of resistance.
 
Voltage tests as indicated on p 26 of the manual give expected voltages with only 300 ma total current (20 ma increase over the K2 alone).
 
Joe Carney, KB3FBR