Klein & Hummel FS-4-A circuit wanted.

[duodiode]

Hello all.

I have a Klein & Hummel Teletest TV pattern generator model FS-4-A dating from about 1956. I have worked on it, every resistor has been replaced, as they had all gone high or O.C., and all of those Wima capacitors replaced, as they were all very leaky, as well as all electrolytic capacitors. However, it does not work! Tracing out the circuit as best I can revealed that at least one component is missing.
I don't have any service information on this instrument at all, not even a circuit diagram. Radiomuseum.org has a circuit for a FS-4, but that is different. Can anyone out there help me with one please?

Cheers, Stuart