This service manual provides comprehensive information for technicians working on Panasonic Colour televisions with the Z7 chassis. Models covered include the TX-21JT1P, TC-21JR1P, TX-14JT1P, and TC-14JR1P. The manual begins with essential safety precautions, followed by helpful service hints to guide technicians through repair procedures. Detailed adjustment procedures and factory settings are outlined, ensuring correct configuration and optimal performance. A waveform pattern table assists technicians in identifying and diagnosing specific problems. Alignment settings are clearly documented, enabling precise tuning for optimal picture quality. The manual also includes comprehensive block diagrams, providing a visual representation of the television's circuitry and components. This detailed information allows technicians to quickly identify and troubleshoot malfunctions.