Vestel 17IPS62 is a widely used Power Supply Unit (PSU) found in 32" to 55" television models under various brand names like Finlux, Telefunken, and Hitachi. Its schematic revolves around a high-voltage primary stage and a secondary stage that provides 12V, 24V, and 35V rails to the mainboard and LED backlight. 1. Core Circuit Overview
Cross-referencing
Block 3: Secondary Side Rectification and Regulation
- Input Stage: 110V-240V AC input with standard noise filtering (Line Filter, Fuse F101, NTC Thermistor, and X/Y Capacitors).
- PFC (Power Factor Correction): Usually controlled by a PWM IC (commonly a part number like L6562 or integrated into the main SoC). The schematic highlights the PFC MOSFET and the PFC coil, stepping up voltage to roughly 380V-400V DC.
- Standby Power (3.3V): A small switching circuit generates the Always-On 3.3V (STB) for the MCU. This allows the TV to accept remote commands while "off."
- Backlight Driver: This board uses an LED Driver Boost Converter. The schematic should show the Boost Diode and Boost Inductor generating high voltage (60V-120V) for the LED strips, controlled by a PWM dimming signal.
If you give up on the repair and decide to buy a replacement board on a site like eBay, do not just search for "17IPS62"