The power supply is a Switch-Mode Power Supply (SMPS) designed for high efficiency and wide voltage tolerance.
51cm (21 inches) measured diagonally with a 90° deflection. Common Repair & Adjustment Guide panasonic tc-21rx20c circuit diagram pdf
Euro-4 / TX-21RX Series Region: PAL/SECAM Markets (Europe, Middle East, Asia) The power supply is a Switch-Mode Power Supply
: Guides for fine-tuning white balance, CRT cut-off, and focus. panasonic tc-21rx20c circuit diagram pdf
: You can often enter the "Factory Mode" or "Service Mode" using the remote control to adjust white balance, CRT cutoff, and vertical geometry without opening the back cover.