This is the heart of the television. The Switched-Mode Power Supply converts AC mains voltage into various DC voltages (typically 110V B+ for the horizontal stage, 12V for the logic, and 24V for audio). The PDF diagram will show the bridge rectifier, the switching transistor (or MOSFET), and the opto-isolator used for regulation control. This is the most common failure point in old Videocon TVs.
Repairing a modern LED or OLED TV often involves "board swapping"—simply replacing a malfunctioning logic board. Repairing a CRT TV, however, is a different beast. These older televisions utilize discrete components, high-voltage flyback transformers (LOT), and complex analog circuitry. videocon crt tv circuit diagram pdf
, this component was responsible for the high-voltage arc that painted light onto the phosphor screen. The Jungle IC: He found the TDA12135PS pinout on the Videocon TDA series schematic This is the heart of the television