[Premium-Rx] Rohde & Schwarz EK-56/57 Help needed

[Bruce Gentry]

I have a Rohde & Schwarz EK-57 I am beginning to repair.   The 
oscillators 3 and 4 are not working, and are likely all that is wrong 
with it. I have a set of manuals, but the schematics for the oscillator 
3 and 4 module and the modules that control it are different.   The 
manuals have the same circuit as  the EK-56 I have.   They cover the 
version of the receiver where the oscillator 3 and 4 module is large, 
has two coax connectors, and a large female connector that accepts a 
male connector that is a small piece of circuit board.  The EK-57 has a 
very different module from the EK-56 and the manuals I have.  The module 
is smaller, has two coax conectors, and two stacked 8 pin male 
connectors. There are a larger number of modules associated with it to 
control it.   All of the modules in question have part numbers starting 
with EK-56, and many of them interchange between the 56 and 57 
receivers.  Can anyone help me with the correct schematics for the 
smaller oscillator 3 and 4 module, and the others that control it?   I 
can provide photos and all available information needed to help  get me 
the correct schematics. Thanks,

    Bruce Gentry, KA2IVY