F+15V, DTV9V, SUB5V SOS Detect Circuit

The F+15V, DTV9V, and SUB5V are monitored for over-voltage and over-current conditions by the SOS circuit on the A board.

Under normal condition, pin 114 of the main CPU (IC1100) is low. When a short circuit or an over-voltage condition occurs, the SOS detect circuit is triggered causing pin 114 to go high. When pin 114 goes high, the TV shuts down and the power LED blinks 10 times.

When the F+STB15V line is shorted, the base of Q3503 goes low turning it on. When Q3503 is on, a high is applied to pin 114 of IC1100 triggering the shutdown operation.

The same will happen if a short circuit develops in the DTV9V line and the SUB5V line.

The transistor Q3505 monitors the SUB5V and the DTV9V lines. If any of these supply voltages becomes excessive, the inline zener diode (D3505 or D3506) goes into conduction and turns on transistor Q3505. As a result, a voltage drop appears at the base of Q3503, causing it to turn on and output a high to pin 114 of the MPU, IC1100. The MPU shuts down the unit.

42

Page 42
Image 42
Panasonic Generation Plasma Display Television manual +15V, DTV9V, SUB5V SOS Detect Circuit

Generation Plasma Display Television specifications

The Panasonic Generation Plasma Display Television, a remarkable innovation in home entertainment technology, has set the standard for high-quality visual experience since its introduction. Renowned for their stunning display quality, these televisions employ advanced plasma technology to deliver vibrant colors, deep blacks, and exceptional contrast ratios. The screens are designed to produce lifelike images, available in various sizes, catering to both casual viewers and dedicated cinephiles.

One of the standout features of Panasonic’s plasma TVs is their superior color accuracy. With the ability to reproduce a wide color spectrum, these displays bring scenes to life, making colors appear more vivid and true to the original. The Real Black Drive technology enhances the display's ability to produce deeper blacks, resulting in richer image quality and an overall more immersive viewing experience, especially in dark environments.

In addition to impressive visuals, Panasonic also focuses on audio quality. Many models feature integrated sound systems that complement the stunning visuals, providing clear, balanced sound. For users looking for even more audio fidelity, the televisions are compatible with various external sound systems, enhancing the home theater experience.

The Panasonic Generation Plasma televisions are equipped with advanced connectivity options. HDMI ports, USB inputs, and built-in Wi-Fi functionality allow users to connect a wide range of devices, from gaming consoles to streaming set-top boxes, ensuring compatibility with modern technology. With smart TV capabilities, users can access streaming services, browse the internet, and enjoy a multitude of apps from the comfort of their couch.

Furthermore, energy efficiency is a key consideration in Panasonic’s design philosophy. Many models are built with energy-saving features that reduce power consumption without compromising performance, appealing to environmentally conscious consumers.

Durability and reliability are also notable characteristics of Panasonic plasma TVs. Designed for extended use, their robust screens are less prone to image retention, a common concern with plasma technology. With proper care, these televisions can deliver exceptional performance for years.

In summary, the Panasonic Generation Plasma Display Television exemplifies the pinnacle of plasma technology, offering superior imaging, impressive audio capabilities, extensive connectivity, and energy efficiency. This television series remains popular among consumers seeking a premium viewing experience. The fusion of these cutting-edge technologies ensures that every movie, show, or sporting event is enjoyed to its fullest potential, marking Panasonic as a leader in the realm of home entertainment technology.