The schematic is for 08753-60162, so it matches what you have. I would monitor the voltage across R43 (the 40 Ohm power resistor) as you tune the YTO. It should be a fairly linear function of frequency with some d.c. offset.
As far as I know, the A3 source board schematic has never been published in a CLIP. I once saw it, and to my eye it didn't look nice enough for official publication. It was probably just good enough to extract the netlist and lay out the board. I suspect they never intended to publish it, so they didn't spend the money on making it look nice.
Vladan
