[R-390] IF Module --- dog

[Pete Williams]

​I'm  still  wrestling  with  this mutt!  Can  any one tell me  ---
before  the  wife calls the men  with the   white  coats ----  why
there is interaction between  LOCAL GAIN  and  RF GAIN controls .
With  IF  input  150uV,modulated ,  function  switch    AGC  and  about
-7V  showing on  DIODE LOAD,  there is precious little  showing on  AGC
rear  panel  #3   and 4 until I  turn up  LOCAL GAIN and   AGC  voltage
dramatically increases.
Is there a  major  wiring  error to  rear panel... pots  seem to have
correct  wiring,  but  previous  owner may  have  had  a go  at  something.
I'm now  about to  gather  strength  and up end the  beast for a  look.
What have I missed?
Cheers
Pete  VK3IZ