Hello Serge,
Good but somewhat discouraging info. Agree that the mainframe is straight forward and of no concern. But those plug-ins look problematic.
I have a service manual for the 83592 (in OK pdf) and the cal procedures are challenging, especially w/o specific (HP) test equipment.
Will do the best I can with what I have. Will check RF levels 1st to hopefully point to the affected block(s).
Hoping (mentioned previously) that the service manual I bought is the real thing. The Keysight one sucks.
Mark in Oregon
KJ7CYN
