Harman Kardon TA5000x resistance specs

I checked the resistance at the tube pins in the pre-amp section per the schematic.  Pins 2 and 7 (screen) of V12 (12ax7) measured 224K and 91K ohms respectively but should be 330 ohms.  The resistance in the other tubes checked out okay.   Pins 2 and 7 of V12 are connected to the balance pot and PCs.  Is there any way to check the PCs?  I thought I would just replace them but i can't find any.   So, if they're bad is the best option to replace them with a point-to-point circuit with caps and resistors?  

Should this be here or under tech talk?