[Elecraft] K2: AGC Problem

[Michael van Hauten]

With my new K2 i have a strange AGC behavior. I cannot detect a difference between AGC on and off. The voltage  at pin 5 U2 is exactly 3.8v after changing the 8V regulator to a better one. All my earlier k2's had a large increase in AF when switching off AGC. I possibly made a short between pin 5 and pin 6 of u2 when measuríng the AGC voltage at pin 5. So possibly 3.8 V came to pin 6. Do i have a defective u2? Reception works very well, only swiching on/off of the AGC is without any change.
Some hints for me?
Michael, DC0ZO 

K3 #1999, K2 #6614