[R-390] 100K Resistor not in circuit.

[Robert Ziolkowski]

I though the S-Meter circuit was not working properly in two of my R-390A's. When measuring the voltage on the 6AK6 V504, Pin 2 it was +4.2V, not -2.5V. Latest schematic I have shows it connected to another tube and a grid divider on V509A. Don't get the 125K or 280 k ohm reading that the Y2K-R3 or other diagrams show. It reads infinity. Don't want to remove the IF Module to see if it is wired like the schematic unless I have to. Is it possible the circuit has been modified in one of the updates? Thanks for your help.