[morzh]

If the tone pot is higher in-circuit, it means it high or even higher (depending on the circuit) out of circuit.

This said, the tone pot almost does not matter in this situation.

What would happen if: (top/right is used as from the sch point of view, not physical locations)

1. Fully disconnect C200 top pin from J200 test terminal (fully disconnect, the pin should be unsoldered).
2. Fully disconnect C202 right pin from the volume pot's wiper terminal.
3. Connect that C202 pin to the J200 Test terminal.

Does the volume become loud, as if at maximum volume? (be careful with local stations).