Note: While I have accessed technical database references for this specific chassis, I do not host files directly. This analysis is based on the standard schematic diagrams for the Panasonic (also known as the TX-21RX series), which the TC-21RX20C utilizes.
I understand you're looking for the circuit diagram (service manual) for the TV. panasonic tc-21rx20c circuit diagram pdf
Many schematics include voltage tables next to ICs or test points. For the TC-21RX20C, typical voltages are: Note: While I have accessed technical database references