However, if you test the tubes in your unit (I am assuming it to be tube type). And then just replace the filter caps outright, as well as all of the paper caps/ black beauties, you should have a decent unit when done, that only really needs calibration (this is where stations like WWV, and knowing some of your local station frequencies come in real handy.
If it is a solid state unit, check the RF output transistor, and audio output transistor tos ee if they are okay, (check each terminal in relation to the others, and note if there is "diode effect", or if there is not. If there is not, change those transistors first, and it would not hurt to go through all of the electrolytics and replace them. If it still does not function, the oscillator section will usually be a slight variation of the usual oscillator designs (Hartley, Colpitts, etc, and this holds true for the tube types also). If there is no oscillation, the oscialltor transistor is probably bad, and this one would have a base, or emitter connection closest to the Condensor for frequency.
In seriousness, you may not really need the extra expense of the manual if you know the tricks.
: I am in real need of a signal generator and picked this one up at an auction. In good shape physically but has no RF output and the audio output is questionable. I think I can fix it if I had a schematic for it..anyone know where I can find one? Thanks, Joe Miller