novosel,
If your circuit board is like mine the lugs (terminals) are visible. Nonetheless you have to remove the pots or disconnect the pickups to get an accurate reading. If you can see the round metal back of the pot, the ground lug has a wire going from the circuit board that is soldered to the back of the pot itself. On one side of this wire there are two other big solder joints which are the center and outside lugs respectively. On mine the lugs of a standard pot fit right through the circuit board from the back to the solder side. The original pots were just regular pots as well, not PC mount pots. Yours may be different.
My guess is that your pots are probably the right value, but I have 5 old stock Tokais, 79'-82' that had the wrong pots. As guitarboy said it is likely a supplier error, but my guess is there are a lot of early Tokais out there with wrong pots. That's why I posted. Ironically, that's probably why I got the guitars I did. A breezy sound tele with a 1 Meg pot sounds dreadful. Sounds stupendous now.
In my opinion pots do affect tone significantly. To illustrate, set your amp clean, set guitar volume on 10, turn pot down a few notches and listen and you will hear the high end disappear. The only factor changed is that as you turn the pot down, you lessen resistance to ground. Lower resistance = less high end and gain. So if your pot doesn't have as much resistance as it should, your losing high end even with the guitar on full. I'ts as if your guitar volume only goes up to five. Conversely, higher resistance =more high end and gain. That's the Breezy sound story. The difference pots make isn't as noticeable as going from a 5.8k vintage pickup to a 12k overwound one, but it is significant.
I've measured many vintage Fender pots and all were significantly less than 250K. This undoubtedly, along with many other factors, contributes to vintage tone. The effect of pot values is more apparent on single coil pickups as they are more nuanced and subtle.
Printed circuit boards should have no noticeable effect on tone. Theoretically, the circuit board traces that are really close to each other may cause some capacitance, but that's too silly to talk about.
If your Love Rock has good clarity and high end I wouldn't change a thing.
Although on my Humbucker guitars I always disconnect the tone controls, (even if you don't use them they bleed signal to ground), and add a bypass capacitor to make up for the high end loss as I turn the pot down. Great idea for humbuckers, crappy idea for most single coils. I've never seen a Love Rock with bypass capacitor on the circuit board, so I'm not surprised yours didn't have one. Bottom line if it ain't broke..........